/* ===== PDF工具站公共样式 | MIT ===== */
:root{
  --bg:#f5f7fa; --card:#ffffff; --text:#1f2937; --muted:#6b7280;
  --brand:#2563eb; --brand-dark:#1d4ed8; --border:#e5e7eb;
  --ok:#16a34a; --warn:#d97706; --err:#dc2626;
  --radius:12px; --shadow:0 1px 3px rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.04);
  --maxw:1100px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;font-size:16px;
  display:flex;flex-direction:column;min-height:100vh;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;width:100%;padding:0 16px}
/* Header */
.site-header{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.logo{font-weight:700;font-size:18px;color:var(--text);display:flex;align-items:center;gap:8px;white-space:nowrap}
.logo .dot{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:800}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{padding:8px 12px;border-radius:8px;color:var(--muted);font-size:14px}
.nav a:hover{background:var(--bg);text-decoration:none;color:var(--text)}
.nav a.active{color:var(--brand);background:#eff6ff}
/* Main */
.main{flex:1;padding:28px 0 48px}
.hero{text-align:center;padding:32px 16px 24px}
.hero h1{font-size:30px;margin:0 0 12px;font-weight:800;letter-spacing:-.5px}
.hero p{color:var(--muted);font-size:16px;margin:0 auto;max-width:640px}
.hero .badge{display:inline-block;background:#eff6ff;color:var(--brand);font-size:13px;padding:4px 12px;border-radius:999px;margin-bottom:14px}
/* Tool grid */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin-top:16px}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;display:flex;flex-direction:column}
.tool-card:hover{transform:translateY(-2px);box-shadow:0 4px 8px rgba(0,0,0,.08),0 16px 40px rgba(0,0,0,.06)}
.tool-card .ico{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:12px}
.tool-card h3{margin:0 0 6px;font-size:17px}
.tool-card p{margin:0;color:var(--muted);font-size:14px;flex:1}
.tool-card .go{margin-top:12px;color:var(--brand);font-size:14px;font-weight:600}
.c1{background:#eff6ff;color:#2563eb}.c2{background:#ecfdf5;color:#16a34a}
.c3{background:#fef3c7;color:#d97706}.c4{background:#fae8ff;color:#a21caf}.c5{background:#fee2e2;color:#dc2626}
/* Tool page */
.tool-header{margin-bottom:20px}
.tool-header h1{font-size:24px;margin:0 0 6px}
.tool-header p{color:var(--muted);margin:0;font-size:14px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin-bottom:16px}
.card h2{margin:0 0 12px;font-size:17px}
.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:36px 16px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}
.dropzone:hover,.dropzone.drag{border-color:var(--brand);background:#eff6ff}
.dropzone .big{font-size:40px;color:var(--brand);margin-bottom:8px}
.dropzone p{margin:4px 0;color:var(--muted)}
.dropzone strong{color:var(--text)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:8px;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:14px;font-weight:600;cursor:pointer;transition:background .15s,opacity .15s;font-family:inherit}
.btn:hover{background:var(--bg)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-dark)}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.field{margin-bottom:14px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.field .hint{font-size:12px;color:var(--muted);font-weight:400;margin-top:4px}
input[type=range]{width:100%;max-width:300px}
input[type=number],select{padding:8px 10px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;width:100%;max-width:300px;background:#fff}
.chk{display:flex;align-items:center;gap:8px;font-size:14px;margin:6px 0}
.chk input{width:16px;height:16px}
.progress{height:8px;background:var(--bg);border-radius:999px;overflow:hidden;margin:12px 0}
.progress .bar{height:100%;background:linear-gradient(90deg,var(--brand),var(--brand-dark));width:0;transition:width .2s}
.status{padding:10px 14px;border-radius:8px;font-size:14px;margin:10px 0}
.status.info{background:#eff6ff;color:#1e40af}
.status.ok{background:#ecfdf5;color:#166534}
.status.err{background:#fef2f2;color:#991b1b}
.status.warn{background:#fffbeb;color:#92400e}
.preview{margin-top:14px;border:1px solid var(--border);border-radius:8px;overflow:hidden;background:#f3f4f6}
.preview .ph{padding:10px 14px;background:#fafafa;border-bottom:1px solid var(--border);font-size:13px;color:var(--muted)}
.preview canvas,.preview img{display:block;max-width:100%;margin:auto;background:#fff}
.page-strip{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.page-thumb{width:90px;border:1px solid var(--border);border-radius:6px;overflow:hidden;cursor:pointer;background:#fff}
.page-thumb img{display:block;width:100%}
.page-thumb.sel{border-color:var(--brand);box-shadow:0 0 0 2px #bfdbfe}
/* Ad slot */
.ad-slot{margin:18px 0;padding:14px;border:1px dashed var(--border);border-radius:var(--radius);background:#fafafa;text-align:center;color:var(--muted);font-size:13px}
/* Footer */
.site-footer{background:#111827;color:#9ca3af;padding:32px 0 20px;margin-top:auto}
.site-footer .wrap{display:flex;flex-direction:column;gap:14px;align-items:center;text-align:center}
.site-footer .links{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;font-size:14px}
.site-footer .links a{color:#9ca3af}
.site-footer .links a:hover{color:#fff}
.site-footer .copy{font-size:12px;color:#6b7280}
.site-footer .ad-mini{font-size:12px;color:#4b5563;border:1px dashed #374151;border-radius:8px;padding:6px 12px}
/* Responsive */
@media(max-width:720px){
  .hero h1{font-size:24px}
  .site-header .wrap{height:auto;padding:10px 16px;flex-direction:column;align-items:flex-start}
  .nav{width:100%;overflow-x:auto}
  .card{padding:16px}
}
/* Small helpers */
.muted{color:var(--muted)}
.small{font-size:13px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.tag{display:inline-block;font-size:12px;padding:2px 8px;border-radius:999px;background:var(--bg);color:var(--muted);border:1px solid var(--border)}
hr{border:none;border-top:1px solid var(--border);margin:16px 0}
.legal h2{font-size:18px;margin:22px 0 8px}
.legal h3{font-size:15px;margin:16px 0 6px}
.legal p,.legal li{font-size:14px;color:#374151}
.legal ul{padding-left:20px}
.legal .update{color:var(--muted);font-size:13px}

/* 备案号 */
.site-footer .beian{font-size:12px;color:#6b7280}
.site-footer .beian a{color:#6b7280}
.site-footer .beian a:hover{color:#fff}