/* ToolBox v5 设计系统（impeccable critique 修复版） */
:root{
  --bg:#f6f7fb; --card:#fff; --ink:#171a26; --muted:#5b6472;
  --brand1:#6366f1; --brand2:#8b5cf6; --brand:#6d5ef0; --brand-ink:#4f46e5;
  --brand-soft:#eef0ff; --border:#e8eaf2; --radius:16px;
  --shadow:0 2px 12px rgba(23,26,38,.06);
  --shadow-lg:0 12px 32px rgba(23,26,38,.14);
  /* 分类色 */
  --c-hot:#ef4444; --c-text:#3b82f6; --c-code:#8b5cf6; --c-image:#10b981;
  --c-life:#f59e0b; --c-office:#6366f1; --c-math:#0ea5e9; --c-file:#64748b;
  --c-media:#ec4899; --c-finance:#14b8a8; --c-info:#a855f7; --c-health:#f43f5e;
  --c-market:#eab308; --c-other:#78716c;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.hidden{display:none!important}

/* 顶栏 */
.topbar{background:rgba(255,255,255,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:60}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:18px}
.logo img{width:34px;height:34px;border-radius:9px}
.logo em{font-style:normal;font-weight:600;font-size:13px;color:var(--muted);margin-left:4px}
.topnav a{color:var(--muted);text-decoration:none;margin-left:6px;padding:8px 14px;border-radius:9px;font-size:14px;font-weight:500;transition:.15s}
.topnav a:hover{color:var(--brand-ink);background:var(--brand-soft)}
.topnav a.active{color:var(--brand-ink);background:var(--brand-soft);font-weight:700}

/* Hero（瘦身版） */
.hero{background:linear-gradient(135deg,#1e1b4b 0%,#312e81 45%,#4c1d95 100%);color:#fff;padding:38px 0 42px;position:relative}
.hero-bg{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.hero-bg::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 20% 0%,rgba(139,92,246,.32),transparent),radial-gradient(500px 280px at 85% 100%,rgba(99,102,241,.28),transparent)}
.hero .wrap{position:relative}
.hero h1{margin:0 0 8px;font-size:clamp(22px,3.5vw,30px);font-weight:800;letter-spacing:.5px}
.hero h1 b{color:#c7d2fe}
.hero p{margin:0 0 20px;color:#c7d2fe;font-size:13.5px}
.hero-search{position:relative;max-width:620px;z-index:70}
.hero-search input{width:100%;padding:13px 20px;border-radius:999px;border:1px solid rgba(255,255,255,.22);font-size:14.5px;background:rgba(255,255,255,.12);color:#fff;outline:none;transition:.2s}
.hero-search input::placeholder{color:#cdd6fe}
.hero-search input:focus{background:rgba(255,255,255,.2);border-color:rgba(255,255,255,.55);box-shadow:0 0 0 3px rgba(255,255,255,.35)}
.search-result{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border-radius:14px;box-shadow:0 20px 50px rgba(0,0,0,.25);max-height:380px;overflow-y:auto;z-index:80}
.search-result a{display:flex;justify-content:space-between;align-items:center;padding:11px 18px;color:var(--ink);text-decoration:none;font-size:14px;border-bottom:1px solid var(--border)}
.search-result a:last-child{border-bottom:none}
.search-result a:hover{background:var(--brand-soft)}
.search-result a small{color:var(--muted);font-size:12px}
.hero-stats{display:flex;gap:26px;margin-top:18px;flex-wrap:wrap}
.hero-stats b{font-size:19px;font-weight:800;margin-right:6px}
.hero-stats span{font-size:12px;color:#a5b4fc}
/* 回访紧凑模式 */
.hero.compact{padding:24px 0}
.hero.compact p,.hero.compact .hero-stats{display:none}
.hero.compact h1{font-size:20px;margin-bottom:14px}

/* 分类 */
.sec-head{display:flex;align-items:baseline;justify-content:space-between;margin:30px 0 14px}
.sec-title{font-size:18px;font-weight:750;margin:0;display:flex;align-items:center;gap:9px}
.sec-title .cicon{font-size:20px}
.more{font-size:13px;color:var(--brand-ink);text-decoration:none;font-weight:600}
.more:hover{text-decoration:underline}
.cats{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin:24px 0 8px}
.cat{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:14px;background:var(--card);border:1px solid var(--border);font-size:14px;font-weight:600;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:.18s}
.cat .cicon{font-size:20px}
.cat small{display:block;font-weight:400;color:var(--muted);font-size:11.5px}
.cat:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow-lg)}

/* 工具卡片 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;text-decoration:none;color:var(--ink);transition:.18s;display:block;box-shadow:var(--shadow)}
.tool-card:hover{border-color:var(--brand);box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.tool-card .thead{display:flex;align-items:center;gap:11px;margin-bottom:7px}
.tico{width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:800;flex-shrink:0;background:color-mix(in srgb,var(--tc,#6366f1) 12%,#fff);color:var(--tc,#6366f1)}
.tool-card h3{margin:0;font-size:14.5px;font-weight:700;line-height:1.4}
.tool-card p{margin:0;font-size:12.5px;color:var(--muted);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tool-card .tag{display:inline-block;font-size:11px;border-radius:6px;padding:2px 8px;margin-bottom:9px;font-weight:600;background:color-mix(in srgb,var(--tc,#6366f1) 10%,#fff);color:var(--tc,#6366f1)}

/* 工具页 */
.crumb{font-size:13px;color:var(--muted);margin:20px 0 6px}
.crumb a{color:var(--brand);text-decoration:none}
.tool-head{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:24px;margin:10px 0 18px;box-shadow:var(--shadow);display:flex;gap:18px;align-items:flex-start}
.tool-head .big-ico{width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;flex-shrink:0;background:color-mix(in srgb,var(--tc,#6366f1) 12%,#fff);color:var(--tc,#6366f1)}
.tool-head h1{font-size:20px;margin:0 0 6px}
.tool-head p{color:var(--muted);margin:0 0 14px;font-size:13.5px;max-width:640px}
.tool-head .actions{display:flex;gap:8px;flex-wrap:wrap}
.btn{padding:9px 20px;border-radius:10px;border:1px solid var(--border);background:var(--card);cursor:pointer;font-size:14px;font-weight:600;transition:.15s}
.btn.primary{background:linear-gradient(135deg,var(--brand1),var(--brand2));color:#fff;border:none;box-shadow:0 4px 14px rgba(23,26,38,.28)}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg)}
.panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:16px;box-shadow:var(--shadow)}
.panel h4{margin:0 0 12px;font-size:15px;font-weight:700}
textarea.io,input.io{width:100%;padding:11px 13px;border:1.5px solid var(--border);border-radius:10px;font-size:14px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;transition:.15s;background:#fbfcfe}
textarea.io:focus,input.io:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,26,38,.08);background:#fff}
textarea.io{min-height:160px;resize:vertical;line-height:1.7}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:14px 0}
.row label{font-size:13px;color:var(--muted)}
.stat{font-size:13px;color:var(--muted)}
pre.out{background:#14162b;color:#e2e8f0;padding:16px;border-radius:12px;overflow-x:auto;font-size:13px;max-height:440px;overflow-y:auto;line-height:1.7}

/* Toast */
.toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%) translateY(20px);background:#171a26;color:#fff;padding:12px 24px;border-radius:12px;font-size:14px;font-weight:600;opacity:0;pointer-events:none;transition:.25s;z-index:200;box-shadow:0 12px 32px rgba(0,0,0,.3)}
.toast.show{opacity:1;transform:translateX(-50%)}

/* 页脚 */
footer{margin-top:52px;padding:32px 0 38px;border-top:1px solid var(--border);color:var(--muted);font-size:13px;text-align:center;background:#fff}
.foot-logo{display:flex;align-items:center;justify-content:center;gap:10px;font-weight:800;font-size:16px;color:var(--ink);margin-bottom:10px}
.foot-logo img{width:30px;height:30px;border-radius:8px}
footer .muted{font-size:12px;opacity:.75}
footer b{color:var(--brand)}

@media (max-width:640px){
  .topnav a{margin-left:2px;padding:8px 10px}
  .hero{padding:30px 0 34px}
  .grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
  .tool-card{padding:13px}
  .tool-card .tico{width:32px;height:32px;font-size:14px}
  .cats{grid-template-columns:repeat(2,1fr)}
  .tool-head{flex-direction:column}
}