:root{
  --bg:#f4f7fb;
  --panel:#ffffff;
  --primary:#2563eb;
  --primary-d:#1d4ed8;
  --primary-soft:#eef4ff;
  --text:#1e293b;
  --muted:#64748b;
  --border:#e6ecf3;
  --shadow:0 8px 28px rgba(37,99,235,.07);
  --shadow-sm:0 2px 10px rgba(37,99,235,.06);
  --radius:16px;
  --ok:#16a34a;
  --err:#dc2626;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg) linear-gradient(180deg,rgba(37,99,235,.03) 0,rgba(37,99,235,0) 420px);
  background-attachment:fixed;
  color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}

/* Topbar */
.topbar{
  position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:14px;
  height:64px;padding:0 22px;background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--border);
}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,#2563eb 0%,#38bdf8 100%);color:#fff;font-size:20px;box-shadow:var(--shadow-sm);
}
.brand-text strong{display:block;font-size:17px;letter-spacing:.5px}
.brand-text small{display:block;color:var(--muted);font-size:11.5px;margin-top:-2px}
.menu-toggle{display:none;border:none;background:none;font-size:22px;cursor:pointer;color:var(--text)}

/* Layout */
.layout{display:flex;min-height:calc(100vh - 64px)}
.sidebar{
  width:236px;flex:0 0 236px;background:var(--panel);border-right:1px solid var(--border);
  padding:18px 12px;display:flex;flex-direction:column;overflow-y:auto;max-height:calc(100vh - 64px);position:sticky;top:64px;
}
.nav{display:flex;flex-direction:column;gap:5px}
.nav-group{font-size:11px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.8px;padding:16px 12px 6px;margin-top:4px}
.nav-group:first-child{padding-top:2px}
.nav-item{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:11px;color:var(--muted);
  font-size:14px;transition:.15s;position:relative;cursor:pointer;
}
.nav-item .ic{font-size:15px;width:18px;text-align:center;filter:grayscale(.25)}
.nav-item:hover{background:var(--primary-soft);color:var(--primary)}
.nav-item.active{background:var(--primary-soft);color:var(--primary);font-weight:700;box-shadow:var(--shadow-sm)}
.nav-item.active::before{content:'';position:absolute;left:0;top:8px;bottom:8px;width:3px;background:var(--primary);border-radius:0 3px 3px 0}
.nav-item.external .ic{filter:none}
.nav-item.external::after{content:'↗';margin-left:auto;font-size:11px;color:var(--muted);opacity:.7}

.content{flex:1;padding:32px;max-width:1000px;margin:0 auto;width:100%}
.panel{display:none;animation:fade .28s ease;width:100%;margin-top:48px}
.panel.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.panel-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.panel-icon{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:24px;
  background:linear-gradient(135deg,var(--primary-soft),#e0f2fe);box-shadow:var(--shadow-sm);
}
.panel h1{font-size:24px;margin:0}
.lead{color:var(--muted);margin:0;font-size:14px}

/* Cards & inputs */
.card{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;margin-bottom:16px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;
}
.card:hover{box-shadow:0 10px 34px rgba(37,99,235,.09)}
.card label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px;font-weight:600}
textarea,input[type=text],input[type=datetime-local],input[type=number],input[type=date],select{
  width:100%;border:1px solid var(--border);border-radius:11px;padding:11px 13px;font-size:14px;
  color:var(--text);background:#fff;font-family:inherit;outline:none;transition:.15s;
}
textarea::placeholder,input::placeholder{color:#b0c0d0}
textarea:focus,input:focus,select:focus{border-color:#93c5fd;box-shadow:0 0 0 3px var(--primary-soft)}
textarea{resize:vertical;line-height:1.6}
.row{display:flex;gap:10px;align-items:center}
.row.gap{margin-top:14px}
.row.wrap{flex-wrap:wrap}
.row input[type=text]{flex:1}
.row label{margin:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.mono-prefix{color:var(--muted);font-family:ui-monospace,Menlo,Consolas,monospace;font-size:16px}

.btn{
  border:none;background:linear-gradient(135deg,var(--primary),#3b82f6);color:#fff;
  padding:10px 18px;border-radius:11px;font-size:14px;cursor:pointer;font-weight:600;transition:.15s;white-space:nowrap;box-shadow:var(--shadow-sm);
}
.btn:hover{background:linear-gradient(135deg,var(--primary-d),var(--primary));transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.ghost{background:#fff;color:var(--primary);border:1px solid var(--border);box-shadow:none}
.btn.ghost:hover{background:var(--primary-soft)}
.btn.block{width:100%;margin-top:18px;padding:13px}

.out{margin-top:12px;background:#f8fafc;border:1px solid var(--border);border-left:4px solid var(--primary);border-radius:11px;padding:14px;font-size:14px;min-height:24px;line-height:1.75;font-family:ui-monospace,Menlo,Consolas,monospace;word-break:break-all;white-space:pre-wrap}
.hint{margin-top:10px;font-size:13px}.hint.ok{color:#16a34a}.hint.err{color:#dc2626}
  .seg{display:inline-flex;background:#f1f5f9;border:1px solid var(--border);border-radius:10px;padding:3px;gap:3px;margin-bottom:14px}
  .seg-btn{border:0;background:transparent;padding:8px 18px;border-radius:8px;font-size:14px;font-weight:600;color:var(--muted);cursor:pointer;transition:.12s}
  .seg-btn.active{background:#fff;color:var(--primary);box-shadow:var(--shadow-sm)}
  .kv{display:grid;grid-template-columns:88px 1fr;gap:6px 12px;font-size:14px;line-height:1.9}
  .kv b{color:var(--muted);font-weight:600}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.stat{background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center;box-shadow:var(--shadow)}
.stat .num{display:block;font-size:30px;font-weight:800;color:var(--primary);letter-spacing:-.5px}
.stat .lab{display:block;font-size:12px;color:var(--muted);margin-top:6px}

/* QR */
.qr-box{margin-top:14px;display:flex;justify-content:center;padding:16px;background:#fff;border:1px solid var(--border);border-radius:11px;min-height:40px}
.qr-box img,.qr-box canvas{display:block}

/* Toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--text);color:#fff;padding:10px 18px;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;transition:.25s;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* 右下角悬浮入口 */
.fab-right{position:fixed;right:22px;bottom:22px;z-index:40;display:flex;align-items:center;gap:10px;padding:10px 16px 10px 12px;background:#fff;border:1px solid var(--border);border-radius:999px;box-shadow:0 6px 22px rgba(37,99,235,.12);font-size:14px;font-weight:600;color:var(--text);transition:.15s;cursor:pointer}
.fab-right:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(37,99,235,.18);color:var(--primary)}
.fab-right .ic{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),#3b82f6);color:#fff;font-size:16px}
@media(max-width:860px){.fab-right{right:14px;bottom:14px;font-size:13px;padding:9px 13px 9px 10px}.fab-right .ic{width:28px;height:28px;font-size:14px}}

/* Responsive grids */
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
@media(max-width:860px){
  .menu-toggle{display:block}
  .sidebar{position:fixed;top:64px;left:0;bottom:0;z-index:25;transform:translateX(-100%);transition:.2s;width:220px;max-height:none}
  .sidebar.open{transform:none;box-shadow:0 0 40px rgba(0,0,0,.12)}
  .content{padding:18px}
}

/* ===== 文档工具专用（.doc-* 前缀，避免与运营样式冲突）===== */
.doc-opts{display:none;margin-bottom:14px;padding:12px 14px;background:var(--primary-soft);border:1px solid var(--border);border-radius:11px;gap:14px;align-items:center;flex-wrap:wrap}
.doc-opts.show{display:flex}
.doc-opts label{font-size:13px;font-weight:600;margin:0}
.doc-opts select,.doc-opts input{width:auto;display:inline-block;padding:7px 10px}
.doc-drop{border:2px dashed var(--border);border-radius:14px;padding:34px 18px;text-align:center;transition:.15s;cursor:pointer;background:#fafbfe}
.doc-drop.over{border-color:var(--primary);background:var(--primary-soft)}
.doc-drop .big{font-size:15px;font-weight:600}
.doc-drop .small{font-size:12px;color:var(--muted);margin-top:6px}
.doc-drop .pick{color:var(--primary);text-decoration:underline}
.doc-files{margin-top:14px;display:none;flex-direction:column;gap:8px}
.doc-files.show{display:flex}
.doc-frow{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--primary-soft);border:1px solid #dbe5ff;border-radius:10px}
.doc-frow .ic{font-size:18px}
.doc-frow .nm{flex:1;font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.doc-frow .meta{font-size:12px;color:var(--muted)}
.doc-frow .x{cursor:pointer;color:var(--muted);font-size:16px}
.doc-progress{margin-top:16px;display:none}
.doc-progress.show{display:block}
.doc-bar{height:8px;background:#e8edf6;border-radius:99px;overflow:hidden}
.doc-bar>i{display:block;height:100%;width:0%;background:linear-gradient(90deg,var(--primary),#3b82f6);transition:width .2s}
.doc-ptxt{font-size:12px;color:var(--muted);margin-top:7px;text-align:center}
.doc-result{display:none;margin-top:18px;padding:14px 16px;border-radius:12px;background:#effaf2;border:1px solid #c7eccf;align-items:center;gap:12px}
.doc-result.show{display:flex}
.doc-result .ic{font-size:20px;color:var(--ok)}
.doc-result .nm{font-weight:600;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.doc-result a.dl{background:var(--ok);color:#fff;padding:8px 14px;border-radius:9px;text-decoration:none;font-size:13px;font-weight:600}
.doc-note{font-size:12px;color:var(--muted);text-align:center;margin-top:18px;line-height:1.6}
.doc-note.err{color:var(--err)}

/* ===== 运营工具补充样式 ===== */
mark,.comp-highlight mark{background:#fef08a;color:#854d0e;padding:0 2px;border-radius:3px;font-weight:700}
.comp-highlight{margin-top:12px;background:#fff;border:1px solid var(--border);border-left:4px solid #facc15;border-radius:11px;padding:14px;font-size:14px;line-height:2;white-space:pre-wrap;word-break:break-word}
.comp-list-tag{display:inline-block;background:#fee2e2;color:#b91c1c;border:1px solid #fecaca;border-radius:999px;padding:3px 12px;margin:3px;font-size:12px;font-weight:600}
.limit-table{display:grid;grid-template-columns:1fr;gap:8px}
.limit-row{display:grid;grid-template-columns:1.3fr .8fr .8fr .9fr;align-items:center;gap:8px;background:#f8fafc;border:1px solid var(--border);border-radius:11px;padding:11px 14px;font-size:13px}
.limit-row.head{background:var(--primary-soft);color:var(--primary);font-weight:700}
.limit-row .over{color:#dc2626;font-weight:700;background:#fee2e2;border-radius:999px;padding:1px 8px;justify-self:start}
.limit-row .ok{color:#16a34a;font-weight:700;background:#dcfce7;border-radius:999px;padding:1px 8px;justify-self:start}
@media(max-width:640px){.limit-row{grid-template-columns:1fr 1fr}.limit-row.head{display:none}.limit-row .over,.limit-row .ok{justify-self:end}}
.emoji-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(48px,1fr));gap:10px;margin-top:6px}
.emoji-grid button{border:1px solid var(--border);background:#fff;border-radius:12px;font-size:24px;height:48px;cursor:pointer;transition:.12s;box-shadow:var(--shadow-sm)}
.emoji-grid button:hover{background:var(--primary-soft);transform:translateY(-2px)}
.title-list{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.title-item{background:#f8fafc;border:1px solid var(--border);border-radius:11px;padding:12px 14px;font-size:14.5px;display:flex;justify-content:space-between;gap:12px;align-items:center;transition:.12s}
.title-item:hover{background:#fff;border-color:#bfdbfe}
.title-item span{flex:1;word-break:break-all}
.title-item button{border:none;background:var(--primary);color:#fff;border-radius:8px;padding:5px 12px;cursor:pointer;font-size:12px;white-space:nowrap;transition:.12s}
.title-item button:hover{background:var(--primary-d)}
input[type=file]{display:block;width:100%;font-size:13px;color:var(--muted);padding:8px 0;cursor:pointer}
.typ-source{white-space:pre-wrap;line-height:2.1;font-size:16px;word-break:break-all;background:#f8fafc;border:1px solid var(--border);border-radius:11px;padding:14px;letter-spacing:.5px}
.typ-source .tc{transition:background .08s}
.typ-source .tc.ok{color:#15803d;background:#dcfce7;border-radius:3px}
.typ-source .tc.bad{color:#b91c1c;background:#fee2e2;border-radius:3px;text-decoration:underline}
.typ-source .tc.cur{background:#bfdbfe;outline:1px solid #3b82f6;border-radius:3px}

/* ===== 首页 / 分类折叠 ===== */
.nav-group.collapsible .group-toggle{display:flex;align-items:center;justify-content:space-between;cursor:pointer;font-size:13px;font-weight:700;color:var(--text);padding:10px 12px;border-radius:10px;margin:2px 0;transition:.12s}
.nav-group.collapsible .group-toggle:hover{background:var(--primary-soft);color:var(--primary)}
.nav-group.collapsible .group-toggle span{display:flex;align-items:center;gap:8px}
.nav-group.collapsible .group-toggle::after{content:'▼';font-size:10px;color:var(--muted);transition:.15s}
.nav-group.collapsible.collapsed .group-toggle::after{transform:rotate(-90deg)}
.nav-group.collapsible.collapsed .nav-item{display:none}
/* 首页 · 按分类索引工具（统一瓷贴，避免卡片高低参差） */
.home-cats{display:flex;flex-direction:column;gap:28px}
.home-cat-h{font-size:15px;font-weight:800;color:var(--text);display:flex;align-items:center;gap:9px;margin:0 0 13px;padding-bottom:9px;border-bottom:1px solid var(--border)}
.home-cat-h .ic{font-size:20px}
.home-cat-n{font-size:11px;font-weight:600;color:var(--muted);background:var(--primary-soft);padding:2px 9px;border-radius:999px;margin-left:2px}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:10px}
.tool-tile{display:flex;align-items:center;gap:9px;padding:11px 13px;border:1px solid var(--border);border-radius:11px;background:#fff;font-size:13.5px;color:var(--text);transition:.12s;text-decoration:none;line-height:1.3}
.tool-tile:hover{background:var(--primary-soft);border-color:#bfdbfe;color:var(--primary);transform:translateY(-1px)}
.tool-tile .tt-ic{font-size:17px;width:20px;text-align:center;flex:0 0 auto}
@media(max-width:860px){
  .tool-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
}