/* ============================================================
   站群管理系统 · 样式系统
   基于 UI 原型设计语言扩展，支持亮色主题
   ============================================================ */
:root{
  --bg:#f5f6f8; --panel:#ffffff; --ink:#1f2733; --muted:#6b7785; --faint:#9aa6b2;
  --line:#e6e9ef; --brand:#2f6bff; --brand-soft:#eaf0ff; --brand-dark:#2559e0;
  --teal:#0fa3a3; --teal-soft:#e2f6f6;
  --amber:#d98a00; --amber-soft:#fdf2dc;
  --red:#e5484d; --red-soft:#fde8e8;
  --green:#18a058; --green-soft:#e6f6ec;
  --purple:#7c5cff; --purple-soft:#f0ecff;
  --radius:12px; --shadow:0 1px 3px rgba(20,30,50,.06),0 6px 18px rgba(20,30,50,.05);
  --shadow-lg:0 20px 60px rgba(10,20,40,.18);
  --sidebar-bg:#0f1b2d; --sidebar-w:230px;
  --topbar-h:60px;
}
*{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;
  background:var(--bg);color:var(--ink);font-size:14px;line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:#cfd6df;border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:#b7c2d0}
::-webkit-scrollbar-track{background:transparent}

/* ========== 布局 ========== */
.app{display:flex;min-height:100vh}
.sidebar{
  width:var(--sidebar-w);background:var(--sidebar-bg);color:#cfd8e3;
  padding:18px 12px;flex:none;display:flex;flex-direction:column;gap:4px;
  position:fixed;top:0;left:0;bottom:0;z-index:20;
}
.main{flex:1;display:flex;flex-direction:column;min-width:0;margin-left:var(--sidebar-w)}

/* ========== 侧边栏 ========== */
.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 16px}
.brand .logo{
  width:36px;height:36px;border-radius:9px;
  background:linear-gradient(135deg,#2f6bff,#0fa3a3);
  display:grid;place-items:center;color:#fff;font-weight:700;font-size:16px;
}
.brand b{color:#fff;font-size:15px;letter-spacing:.3px;display:block}
.brand small{display:block;color:#7f8ea3;font-size:11px;font-weight:400}
.nav{display:flex;flex-direction:column;gap:2px}
.nav-group{margin-top:8px;padding:6px 10px 4px;font-size:11px;color:#5f6f82;text-transform:uppercase;letter-spacing:.5px}
.nav a{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;
  color:#b7c2d0;font-size:13.5px;cursor:pointer;transition:.15s;user-select:none;
}
.nav a:hover{background:#16263c;color:#fff}
.nav a.active{background:var(--brand);color:#fff;box-shadow:0 3px 10px rgba(47,107,255,.35)}
.nav a .ic{width:18px;text-align:center;opacity:.9;font-size:14px}
.nav a .badge{margin-left:auto;background:rgba(255,255,255,.15);color:#fff;font-size:11px;padding:1px 7px;border-radius:10px}
.nav a.active .badge{background:rgba(255,255,255,.25)}
.side-foot{margin-top:auto;font-size:11px;color:#5f6f82;padding:10px 8px 0;border-top:1px solid #1c2c40;line-height:1.7}
.side-foot b{color:#cfd8e3}

/* ========== 顶栏 ========== */
.topbar{
  height:var(--topbar-h);background:var(--panel);border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 22px;position:sticky;top:0;z-index:15;
}
.topbar h1{font-size:16px;margin:0;font-weight:600}
.topbar .sub{font-size:12px;color:var(--muted);margin-top:2px}
.topbar-right{display:flex;align-items:center;gap:14px}
.topbar .search-global{
  display:flex;align-items:center;gap:6px;background:var(--bg);border:1px solid var(--line);
  border-radius:9px;padding:7px 12px;min-width:260px;
}
.topbar .search-global input{border:0;outline:0;font-size:13px;width:100%;background:transparent}
.user{display:flex;align-items:center;gap:10px;cursor:pointer}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-weight:600;font-size:13px}
.user .uname{font-size:13px;font-weight:500}

/* ========== 内容区 ========== */
.content{padding:22px;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ========== 栅格 ========== */
.grid{display:grid;gap:14px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:1100px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.g4,.g3,.g2{grid-template-columns:1fr}}

/* ========== 卡片 ========== */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:14px}
.card .hd{padding:14px 16px;border-bottom:1px solid var(--line);font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:10px}
.card .hd .title{display:flex;align-items:center;gap:8px}
.card .hd .actions{display:flex;gap:8px;align-items:center}
.card .bd{padding:16px}
.card .bd.flush{padding:0}
.card.card-accent{border-left:3px solid var(--brand)}
.card.card-teal{border-left:3px solid var(--teal)}
.card.card-amber{border-left:3px solid var(--amber)}
.card.card-purple{border-left:3px solid var(--purple)}

/* ========== 统计卡 ========== */
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:15px 16px;box-shadow:var(--shadow);transition:.2s}
.stat:hover{transform:translateY(-2px);box-shadow:0 4px 20px rgba(20,30,50,.1)}
.stat .k{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px}
.stat .v{font-size:26px;font-weight:700;margin-top:4px;letter-spacing:-.5px}
.stat .t{font-size:11px;color:var(--faint);margin-top:4px}
.stat .v.brand{color:var(--brand)} .stat .v.teal{color:var(--teal)} .stat .v.green{color:var(--green)} .stat .v.amber{color:var(--amber)} .stat .v.red{color:var(--red)} .stat .v.purple{color:var(--purple)}
.stat .delta{display:inline-flex;align-items:center;gap:3px;font-size:11px;font-weight:600;padding:1px 6px;border-radius:8px;margin-left:6px}
.stat .delta.up{background:var(--green-soft);color:var(--green)}
.stat .delta.down{background:var(--red-soft);color:var(--red)}

/* ========== 工具栏 ========== */
.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.toolbar .spacer{flex:1}
.search{display:flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:7px 12px;min-width:240px}
.search input{border:0;outline:0;font-size:13px;width:100%;background:transparent}
.search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
select,input[type=text],input[type=number],textarea{
  font-family:inherit;font-size:13px;color:var(--ink);
}
.sel{border:1px solid var(--line);border-radius:9px;padding:7px 10px;background:#fff;color:var(--ink);cursor:pointer;outline:0}
.sel:focus{border-color:var(--brand)}
.input{border:1px solid var(--line);border-radius:9px;padding:8px 12px;width:100%;background:#fff;outline:0;transition:.15s}
.input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
textarea.input{resize:vertical;min-height:80px;font-family:inherit}

/* ========== 按钮 ========== */
.btn{
  border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:9px;
  padding:8px 14px;font-size:13px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;
  transition:.15s;white-space:nowrap;line-height:1;
}
.btn:hover{border-color:#c7ced8;background:#fafbff}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-dark)}
.btn.teal{background:var(--teal);border-color:var(--teal);color:#fff}
.btn.green{background:var(--green);border-color:var(--green);color:#fff}
.btn.amber{background:var(--amber);border-color:var(--amber);color:#fff}
.btn.danger{background:var(--red);border-color:var(--red);color:#fff}
.btn.danger-outline{color:var(--red);border-color:var(--red-soft);background:var(--red-soft)}
.btn.danger-outline:hover{background:var(--red);color:#fff;border-color:var(--red)}
.btn.ghost{background:transparent;border-color:transparent}
.btn.ghost:hover{background:#eef0f3}
.btn.sm{padding:5px 10px;font-size:12px}
.btn.lg{padding:11px 20px;font-size:14px}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ========== 表格 ========== */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
th{color:var(--muted);font-weight:600;background:#fafbfc;font-size:12px;position:sticky;top:0}
tbody tr{transition:.1s}
tbody tr:hover{background:#fafbff}
tbody tr.selected{background:var(--brand-soft)}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px}
.tx{color:var(--muted);font-size:12px}

/* ========== 标签 ========== */
.tag{display:inline-flex;align-items:center;padding:2px 9px;border-radius:999px;font-size:11.5px;font-weight:600;line-height:1.7;white-space:nowrap}
.t-green{background:var(--green-soft);color:var(--green)}
.t-blue{background:var(--brand-soft);color:var(--brand)}
.t-teal{background:var(--teal-soft);color:var(--teal)}
.t-amber{background:var(--amber-soft);color:var(--amber)}
.t-gray{background:#eef0f3;color:#5b6675}
.t-red{background:var(--red-soft);color:var(--red)}
.t-purple{background:var(--purple-soft);color:var(--purple)}

/* ========== 行操作 ========== */
.row-actions{display:flex;gap:8px;align-items:center}
.row-actions a{color:var(--brand);cursor:pointer;font-size:12.5px;padding:2px 4px;border-radius:4px;transition:.1s}
.row-actions a:hover{background:var(--brand-soft)}
.row-actions a.danger{color:var(--red)}
.row-actions a.danger:hover{background:var(--red-soft)}
.row-actions a.warn{color:var(--amber)}
.row-actions a.warn:hover{background:var(--amber-soft)}

/* ========== 分页 ========== */
.pager{display:flex;align-items:center;gap:10px;margin-top:14px;flex-wrap:wrap}
.pager .info{color:var(--muted);font-size:12.5px;display:flex;align-items:center;gap:6px}
.pager .pages{display:flex;gap:4px;margin-left:auto}
.pg{min-width:32px;height:32px;border:1px solid var(--line);background:#fff;border-radius:8px;display:grid;place-items:center;cursor:pointer;font-size:12.5px;transition:.1s;padding:0 8px}
.pg.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.pg:hover:not(.active){border-color:#c7ced8;background:#fafbff}
.pg.disabled{opacity:.4;cursor:not-allowed}

/* ========== 模态框 ========== */
.mask{position:fixed;inset:0;background:rgba(15,25,40,.5);display:none;align-items:center;justify-content:center;z-index:50;backdrop-filter:blur(2px)}
.mask.show{display:flex;animation:fade .2s}
.modal{background:#fff;border-radius:14px;width:600px;max-width:92vw;max-height:88vh;box-shadow:var(--shadow-lg);overflow:hidden;display:flex;flex-direction:column}
.modal-sm{width:420px}
.modal-lg{width:820px}
.modal .mh{padding:16px 20px;border-bottom:1px solid var(--line);font-weight:600;display:flex;justify-content:space-between;align-items:center;flex:none}
.modal .mh .title{display:flex;align-items:center;gap:8px}
.modal .mb{padding:20px;overflow-y:auto;flex:1}
.modal .mf{padding:14px 20px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:10px;flex:none}
.x{cursor:pointer;color:var(--faint);font-size:20px;border:0;background:none;line-height:1;padding:0 4px}
.x:hover{color:var(--ink)}

/* ========== 表单 ========== */
.field{margin-bottom:16px}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px;font-weight:600}
.field .ctl{display:flex;gap:10px;align-items:center}
.field .hint{font-size:12px;color:var(--faint);margin-top:5px}
.field .ctl .input{flex:1}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:600px){.form-row{grid-template-columns:1fr}}

/* ========== 开关 ========== */
.switch{position:relative;width:42px;height:24px;background:#cfd6df;border-radius:999px;transition:.2s;flex:none;cursor:pointer}
.switch.on{background:var(--brand)}
.switch::after{content:"";position:absolute;width:18px;height:18px;background:#fff;border-radius:50%;top:3px;left:3px;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.2)}
.switch.on::after{left:21px}

/* ========== 提示框 ========== */
.note{background:var(--brand-soft);border:1px solid #d4e1ff;border-radius:9px;padding:11px 14px;color:#28406e;font-size:12.5px;line-height:1.7}
.note.teal{background:var(--teal-soft);border-color:#bce8e8;color:#0a5f5f}
.note.amber{background:var(--amber-soft);border-color:#f3d999;color:#7a4f06}
.note.red{background:var(--red-soft);border-color:#f5c2c4;color:#7a1f23}
.note b{color:inherit}

/* ========== KV 列表 ========== */
.kv{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px dashed var(--line);font-size:13px;gap:10px}
.kv:last-child{border-bottom:0}
.kv .l{color:var(--muted)}
.kv .r{font-weight:500;text-align:right}

/* ========== Chips ========== */
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{background:#eef0f3;border-radius:8px;padding:5px 10px;font-size:12px;font-family:ui-monospace,monospace}
.chip.clickable{cursor:pointer;transition:.1s}
.chip.clickable:hover{background:var(--brand-soft);color:var(--brand)}
.legend{font-size:12px;color:var(--muted);margin-top:6px;line-height:1.6}
.legend code{background:#eef0f3;padding:1px 6px;border-radius:5px;font-size:11.5px;font-family:ui-monospace,monospace}
.pill-row{display:flex;gap:8px;flex-wrap:wrap}

/* ========== 上传区 ========== */
.drop{border:1.8px dashed #c7ced8;border-radius:11px;padding:32px;text-align:center;color:var(--muted);background:#fafbfc;cursor:pointer;transition:.2s}
.drop:hover,.drop.dragover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand)}
.drop b{color:var(--ink)}
.drop .ic{font-size:28px;display:block;margin-bottom:8px}

/* ========== 步骤条 ========== */
.steps{display:flex;gap:8px;margin-bottom:18px}
.step{flex:1;text-align:center;font-size:12px;color:var(--muted);padding-top:8px;border-top:3px solid var(--line);position:relative}
.step.on{border-color:var(--brand);color:var(--brand);font-weight:600}
.step.done{border-color:var(--green);color:var(--green);font-weight:600}

/* ========== 进度条 ========== */
.progress{height:6px;background:#eef0f3;border-radius:3px;overflow:hidden}
.progress .bar{height:100%;background:var(--brand);border-radius:3px;transition:.3s}
.progress .bar.teal{background:var(--teal)}
.progress .bar.green{background:var(--green)}
.progress .bar.amber{background:var(--amber)}

/* ========== Toast ========== */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
  background:#0f1b2d;color:#fff;padding:11px 20px;border-radius:10px;font-size:13px;
  opacity:0;transition:.3s;z-index:99;pointer-events:none;box-shadow:0 6px 20px rgba(0,0,0,.25);
  max-width:90vw;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.success{background:var(--green)}
.toast.error{background:var(--red)}
.toast.warn{background:var(--amber)}

/* ========== 徽章圆点 ========== */
.dot{width:8px;height:8px;border-radius:50%;display:inline-block}
.dot.green{background:var(--green)} .dot.amber{background:var(--amber)} .dot.red{background:var(--red)} .dot.gray{background:#cfd6df}

/* ========== 空状态 ========== */
.empty{text-align:center;padding:48px 20px;color:var(--faint)}
.empty .ic{font-size:40px;display:block;margin-bottom:10px;opacity:.5}

/* ========== 章节标题 ========== */
.section-title{font-size:14px;font-weight:600;margin:18px 0 10px;display:flex;align-items:center;gap:8px}
.section-title:first-child{margin-top:0}

/* ========== 图表容器 ========== */
.chart-box{position:relative;height:260px}
.chart-box.sm{height:180px}

/* ========== 面包屑 ========== */
.crumb{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px;margin-bottom:12px}
.crumb a{cursor:pointer}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--faint)}

/* ========== 代码块 ========== */
pre.code{background:#f6f8fa;border:1px solid var(--line);border-radius:8px;padding:14px;overflow-x:auto;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;line-height:1.6;color:#1f2733}
pre.code .kw{color:var(--purple)} pre.code .str{color:var(--green)} pre.code .com{color:var(--faint)}

/* ========== Tab ========== */
.tabs{display:flex;gap:2px;border-bottom:1px solid var(--line);margin-bottom:16px}
.tab{padding:9px 16px;cursor:pointer;font-size:13.5px;color:var(--muted);border-bottom:2px solid transparent;transition:.15s}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--brand);border-color:var(--brand);font-weight:600}

/* ========== 状态点 ========== */
.status-pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500}
.status-pill .dot{width:7px;height:7px}

/* ========== 友链关系图 ========== */
.link-graph{display:flex;align-items:center;justify-content:center;gap:20px;padding:20px;flex-wrap:wrap}
.link-node{background:var(--panel);border:2px solid var(--brand);border-radius:10px;padding:10px 16px;text-align:center;font-size:12px;font-weight:600;color:var(--brand)}
.link-node.muted{border-color:var(--line);color:var(--muted)}
.link-arrow{color:var(--faint);font-size:18px}

/* ========== 登录层 ========== */
.login-screen{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e293b 0%,#0f172a 100%)}
.login-card{width:340px;max-width:90vw;background:#fff;border-radius:16px;padding:38px 32px;box-shadow:0 20px 60px rgba(0,0,0,.35);text-align:center}
.login-logo{width:56px;height:56px;border-radius:14px;margin:0 auto 16px;background:linear-gradient(135deg,#2f6bff,#1e40af);color:#fff;font-size:26px;font-weight:700;display:flex;align-items:center;justify-content:center}
.login-card h2{margin:0 0 6px;font-size:20px;color:#1f2733}
.login-sub{margin:0 0 22px;font-size:13px;color:#94a3b8}
.login-form{display:flex;flex-direction:column;gap:12px}
.login-form input{height:44px;border:1px solid #e2e8f0;border-radius:10px;padding:0 14px;font-size:14px;outline:none;transition:.15s;background:#f8fafc}
.login-form input:focus{border-color:#2f6bff;background:#fff;box-shadow:0 0 0 3px rgba(47,107,255,.12)}
.login-form input[readonly]{background:#eef2f7;color:#64748b;font-weight:600}
.login-btn{height:44px;border:none;border-radius:10px;background:linear-gradient(135deg,#2f6bff,#1e40af);color:#fff;font-size:15px;font-weight:600;letter-spacing:2px;cursor:pointer;transition:.15s}
.login-btn:hover{opacity:.92}
.login-btn:disabled{opacity:.6;cursor:default}
.login-err{color:#e5484d;font-size:12.5px;min-height:16px}
.logout-btn{margin-top:10px;width:100%;padding:7px 0;border:1px solid #e2e8f0;background:#fff;color:#64748b;border-radius:8px;font-size:12px;cursor:pointer;transition:.15s}
.logout-btn:hover{border-color:#e5484d;color:#e5484d}