/* 快工具 - 公共样式（hub 与各落地页共用） */
:root{
  --bg:#f5f7fb; --card:#ffffff; --text:#1f2733; --muted:#6b7686;
  --brand:#2b5cff; --brand-2:#1e42c8; --ok:#0aa670; --warn:#e6a23c;
  --line:#e6eaf2; --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--brand);text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}

/* header */
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.hrow{display:flex;align-items:center;justify-content:space-between;height:60px;gap:10px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:19px;color:var(--text)}
.logo .bolt{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,#2b5cff,#7c4dff);display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px}
.site-nav{display:flex;gap:4px;flex-wrap:wrap}
.site-nav a{font-size:13px;color:#48546a;padding:6px 10px;border-radius:8px}
.site-nav a:hover{background:#f0f4ff;color:var(--brand)}
.btn{display:inline-block;border:none;cursor:pointer;font-size:14px;font-weight:600;border-radius:10px;padding:8px 16px;transition:.15s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-2)}
.btn-outline{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn-outline:hover{background:#f0f4ff}

/* hero + breadcrumb */
.crumbs{font-size:13px;color:var(--muted);padding:14px 16px 0}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.hero{text-align:center;padding:22px 16px 12px}
.hero h1{font-size:26px;font-weight:800}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero p{color:var(--muted);margin-top:8px;font-size:15px}

/* ad slots —— 暂时隐藏广告位；恢复展示时删除下面的 display:none 即可 */
.ad-slot{border:2px dashed #c3cde0;border-radius:var(--radius);background:#fbfcff;color:#8a97ab;text-align:center;padding:18px 10px;font-size:13px;margin:18px 0;display:none}
.ad-slot b{color:#5f6d85}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin:16px 0;box-shadow:0 2px 10px rgba(31,39,51,.04)}
.card h2{font-size:19px;margin-bottom:4px}
.card .desc{color:var(--muted);font-size:13px;margin-bottom:16px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:720px){.grid2{grid-template-columns:1fr}}

/* forms */
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:5px;color:#37424f}
.field input,.field select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:15px;background:#fbfcff}
.field input:focus,.field select:focus{outline:2px solid #bcd0ff;border-color:var(--brand)}
.range-row{display:flex;align-items:center;gap:10px}
.range-row input[type=range]{flex:1;accent-color:var(--brand)}
.range-val{font-weight:700;color:var(--brand);min-width:52px;text-align:right}

/* results */
.result-box{background:#f0f6ff;border:1px solid #d6e2ff;border-radius:12px;padding:16px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin-bottom:12px}
.kpi{background:#fff;border:1px solid #d6e2ff;border-radius:10px;padding:10px 12px;text-align:center}
.kpi .num{font-size:18px;font-weight:800;color:var(--brand)}
.kpi .lbl{font-size:12px;color:var(--muted)}
.table{width:100%;border-collapse:collapse;font-size:13px;background:#fff;border-radius:10px;overflow:hidden}
.table th,.table td{border-bottom:1px solid var(--line);padding:7px 10px;text-align:right}
.table th{background:#f0f4ff;text-align:right}
.table td:first-child,.table th:first-child{text-align:left}
.table tr.hi td{color:var(--brand);font-weight:700}

/* dropzone */
.dropzone{border:2px dashed #b9c7e0;border-radius:12px;padding:34px 16px;text-align:center;color:var(--muted);cursor:pointer;background:#fbfcff;transition:.15s}
.dropzone:hover,.dropzone.over{border-color:var(--brand);background:#f0f4ff;color:var(--brand)}
.thumb-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;margin-top:14px}
.thumb{background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px;font-size:12px;text-align:center}
.thumb img{width:100%;height:80px;object-fit:contain;background:#f5f5f5;border-radius:6px;margin-bottom:6px}
.save-link{display:inline-block;font-size:12px;background:var(--brand);color:#fff;padding:4px 10px;border-radius:8px;cursor:pointer}

/* qr */
#qrbox{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;display:flex;justify-content:center;min-height:200px;align-items:center}
#qrbox img{max-width:220px;height:auto}
#qr-fallback{display:none;color:var(--muted);font-size:13px;text-align:center;padding:30px 10px}

/* faq */
.faq{max-width:820px;margin:8px auto}
.faq h2{font-size:20px;text-align:center;margin:18px 0 4px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin:10px 0;padding:16px 18px}
.faq-item h3{font-size:15px;margin-bottom:6px}
.faq-item p{font-size:14px;color:#48546a}

/* related tools */
.related{max-width:820px;margin:0 auto 10px}
.related h2{font-size:18px;margin:16px 0 8px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.rel-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center;font-size:14px}
.rel-card .ico{font-size:22px;display:block;margin-bottom:2px}
.rel-card:hover{border-color:var(--brand);color:var(--brand)}

/* footer */
footer{background:#fff;border-top:1px solid var(--line);padding:24px 0;text-align:center;color:var(--muted);font-size:12px;margin-top:24px}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);background:#1f2733;color:#fff;padding:10px 20px;border-radius:99px;font-size:14px;opacity:0;transition:.3s;z-index:99}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}