:root{
  --brand:#4f46e5; --brand-dark:#4338ca; --brand-soft:#eef2ff;
  --ink:#0f172a; --muted:#64748b; --faint:#94a3b8;
  --line:#e5e9f2; --bg:#f5f6fb; --card:#ffffff;
  --ok:#059669; --ok-soft:#ecfdf5; --warn:#b45309; --warn-soft:#fffbeb; --danger:#dc2626; --danger-soft:#fef2f2;
  --r:14px; --r-sm:10px; --shadow:0 1px 2px rgba(15,23,42,.05),0 8px 24px -12px rgba(15,23,42,.18);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,sans-serif;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;line-height:1.6}
a{color:var(--brand);text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

/* 顶栏 */
.nav{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav-in{max-width:1180px;margin:0 auto;padding:0 20px;height:62px;display:flex;align-items:center;gap:14px}
.logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:16px;color:var(--ink)}
.logo .mark{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--brand),#7c3aed);display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px}
.nav .sp{flex:1}
.nav a.link{color:var(--muted);font-size:14px;padding:8px 10px;border-radius:8px}
.nav a.link:hover{background:var(--brand-soft);color:var(--brand)}
.nav a.link.on{color:var(--brand);font-weight:600}

/* 通用 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.pad{padding:20px}
.h1{font-size:26px;font-weight:700;letter-spacing:-.4px}
.h2{font-size:17px;font-weight:600}
.sub{color:var(--muted);font-size:14px}
.muted{color:var(--muted)}
.faint{color:var(--faint)}
.row{display:flex;align-items:center;gap:10px}
.col{display:flex;flex-direction:column;gap:6px}
.grow{flex:1}
.mt{margin-top:16px}.mt-s{margin-top:8px}.mt-l{margin-top:26px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:10px;padding:10px 16px;font-size:14px;font-weight:600;cursor:pointer;transition:.15s;background:#eef1f7;color:var(--ink)}
.btn:hover{filter:brightness(.97)}
.btn.primary{background:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-dark)}
.btn.ghost{background:transparent;border:1px solid var(--line)}
.btn.danger{background:var(--danger-soft);color:var(--danger)}
.btn.ok{background:var(--ok-soft);color:var(--ok)}
.btn.sm{padding:6px 11px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.block{width:100%}

label.f{display:block;font-size:13px;font-weight:600;color:#334155;margin-bottom:6px}
input.i,select.i,textarea.i{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit;background:#fff;color:var(--ink);outline:none;transition:.15s}
input.i:focus,select.i:focus,textarea.i:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,70,229,.12)}
.hint{font-size:12px;color:var(--faint)}

.badge{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:600;padding:2px 9px;border-radius:999px}
.badge.ok{background:var(--ok-soft);color:var(--ok)}
.badge.warn{background:var(--warn-soft);color:var(--warn)}
.badge.gray{background:#eef1f7;color:var(--muted)}
.badge.brand{background:var(--brand-soft);color:var(--brand)}

table.t{width:100%;border-collapse:collapse;font-size:14px}
table.t th{text-align:left;font-size:12px;font-weight:600;color:var(--muted);padding:10px 12px;border-bottom:1px solid var(--line);background:#fafbfe}
table.t td{padding:12px;border-bottom:1px solid var(--line);vertical-align:middle}
table.t tr:last-child td{border-bottom:none}
.empty{padding:44px 20px;text-align:center;color:var(--faint);font-size:14px}

.tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-bottom:18px}
.tab{padding:11px 16px;font-size:14px;font-weight:600;color:var(--muted);cursor:pointer;border:none;background:none;border-bottom:2px solid transparent;margin-bottom:-1px}
.tab.on{color:var(--brand);border-bottom-color:var(--brand)}

.toast{position:fixed;left:50%;top:22px;transform:translateX(-50%);background:#0f172a;color:#fff;padding:11px 18px;border-radius:10px;font-size:14px;z-index:9999;box-shadow:0 10px 30px rgba(0,0,0,.25);opacity:0;transition:.25s;pointer-events:none}
.toast.show{opacity:1;top:30px}
.toast.err{background:var(--danger)}

/* 模态 */
.mask{position:fixed;inset:0;background:rgba(15,23,42,.45);display:none;align-items:center;justify-content:center;z-index:200;padding:16px}
.mask.show{display:flex}
.modal{background:#fff;border-radius:16px;width:100%;max-width:440px;padding:24px;box-shadow:0 24px 60px rgba(0,0,0,.3);max-height:92vh;overflow:auto}
.modal h3{font-size:17px;margin-bottom:16px}

/* 首页 */
.hero{padding:64px 0 44px;text-align:center}
.hero .tag{display:inline-block;background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:38px;font-weight:800;letter-spacing:-1px;line-height:1.25}
.hero p{color:var(--muted);font-size:16px;margin-top:14px;max-width:620px;margin-left:auto;margin-right:auto}
.hero .cta{margin-top:26px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feat{padding:22px}
.feat .ico{width:40px;height:40px;border-radius:11px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:12px}
.feat h3{font-size:15px;margin-bottom:6px}
.feat p{font-size:13.5px;color:var(--muted)}

/* 统计卡 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stat{padding:16px 18px}
.stat .k{font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:6px}
.stat .v{font-size:24px;font-weight:700;margin-top:6px;letter-spacing:-.5px}

/* 盖章页布局 */
.sign-grid{display:grid;grid-template-columns:1fr 340px;gap:18px;align-items:start}
.canvas-box{border:1px solid var(--line);border-radius:12px;background:#fbfcfe;padding:14px;overflow:auto;max-height:720px;position:relative;text-align:center;cursor:crosshair}
.canvas-box .inner{position:relative;display:inline-block;vertical-align:top}
.canvas-box canvas{max-width:100%;display:block}
#markerCanvas{position:absolute;left:0;top:0;pointer-events:none}
.pos-list{max-height:230px;overflow:auto;display:flex;flex-direction:column;gap:8px}
.pos-item{display:flex;align-items:center;gap:8px;background:#f8fafc;border:1px solid var(--line);border-radius:9px;padding:8px 10px;font-size:12.5px}
.seal-prev{width:96px;height:96px;border:1px dashed var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden;background:#fff}
.seal-prev img{max-width:100%;max-height:100%}

/* 验证结果 */
.vresult{border-radius:14px;padding:22px;text-align:center;margin-bottom:18px}
.vresult.ok{background:var(--ok-soft);border:1px solid #a7f3d0}
.vresult.bad{background:var(--danger-soft);border:1px solid #fecaca}
.vresult .ic{font-size:40px}
.vresult h2{font-size:19px;margin-top:6px}
.kv{display:grid;grid-template-columns:130px 1fr;gap:10px 14px;font-size:13.5px}
.kv .k{color:var(--muted)}
.kv .v{font-weight:600;word-break:break-all}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px}

@media(max-width:900px){
  .sign-grid{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:28px}
  .kv{grid-template-columns:100px 1fr}
}