:root{
  --bg:#f4f7f6;--card:#fff;--ink:#1f2937;--muted:#6b7280;
  --brand:#0d9488;--brand2:#10b981;--line:#e5e7eb;
  --shadow:0 1px 3px rgba(0,0,0,.08),0 8px 24px rgba(0,0,0,.04);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.brand{font-weight:700;font-size:18px;display:flex;align-items:center;gap:8px}
.brand .dot{width:11px;height:11px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2))}
.nav a{color:var(--muted);text-decoration:none;font-size:14px;margin-left:18px}
.nav a.active,.nav a:hover{color:var(--brand)}
.wrap{max-width:1080px;margin:0 auto;padding:28px 24px}
.hero h1{font-size:26px;margin:0 0 6px}
.hero p{color:var(--muted);margin:0 0 22px;line-height:1.6}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow);margin-bottom:22px}
.row{display:flex;gap:14px;flex-wrap:wrap;align-items:flex-end}
.field{flex:1;min-width:260px}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
input[type=text]{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:9px;font-size:14px;background:#fafafa}
input[type=text]:focus{outline:none;border-color:var(--brand);background:#fff}
.btn{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border:0;padding:12px 22px;border-radius:9px;font-size:14px;font-weight:600;cursor:pointer;white-space:nowrap}
.btn:disabled{opacity:.55;cursor:not-allowed}
.hint{font-size:12px;color:var(--muted);margin-top:10px;word-break:break-all}
.range{display:flex;align-items:center;gap:10px}
.range input{flex:1}
.range span{font-size:12px;color:var(--muted)}
.stat{display:flex;gap:30px}
.stat .n{font-size:26px;font-weight:700;color:var(--brand)}
.stat .l{font-size:12px;color:var(--muted)}
.qhead{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.qhead img{width:64px;height:64px;border-radius:10px;object-fit:cover;border:2px solid var(--brand2)}
.qhead .t{font-weight:600}
.qhead .s{font-size:13px;color:var(--muted);margin-top:2px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(148px,1fr));gap:12px}
.thumb{position:relative;border-radius:10px;overflow:hidden;background:#eee;aspect-ratio:1;cursor:pointer;display:block}
.thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .2s}
.thumb:hover img{transform:scale(1.05)}
.thumb .badge{position:absolute;left:6px;bottom:6px;background:rgba(0,0,0,.7);color:#fff;font-size:11px;padding:2px 7px;border-radius:20px}
.thumb .vtag{position:absolute;right:6px;top:6px;background:rgba(13,148,136,.92);color:#fff;font-size:11px;padding:2px 7px;border-radius:20px;font-weight:600}
.thumb[data-kind=video]::after{content:'▶';position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:40px;height:40px;line-height:40px;text-align:center;background:rgba(0,0,0,.5);color:#fff;border-radius:50%;font-size:16px;pointer-events:none}
.empty{color:var(--muted);font-size:14px;padding:8px 0}
.spinner{display:inline-block;width:16px;height:16px;border:2px solid #fff;border-top-color:transparent;border-radius:50%;animation:spin .7s linear infinite;vertical-align:-2px;margin-right:6px}
@keyframes spin{to{transform:rotate(360deg)}}
.toast{padding:12px 14px;border-radius:9px;font-size:14px;margin-top:14px}
.toast.ok{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.toast.err{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.drop{border:2px dashed #cbd5e1;border-radius:12px;padding:30px;text-align:center;color:var(--muted);cursor:pointer;background:#fafafa;transition:.15s}
.drop:hover,.drop.over{border-color:var(--brand);background:#f0fdfa;color:var(--brand)}
.preview{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.pv{position:relative;width:84px;height:84px;border-radius:10px;overflow:hidden;border:1px solid var(--line)}
.pv img{width:100%;height:100%;object-fit:cover}
.pv .x{position:absolute;top:3px;right:3px;width:20px;height:20px;line-height:18px;text-align:center;background:rgba(0,0,0,.6);color:#fff;border-radius:50%;font-size:14px;cursor:pointer}
.count-head{font-size:18px;font-weight:700;margin-bottom:14px}
.count-head b{color:var(--brand)}
.count-head .sub{font-size:13px;color:var(--muted);font-weight:400}
.thumb.body{outline:2px solid #f59e0b;outline-offset:-2px}
.section-body .count-head b{color:#d97706}
.fbtn{padding:6px 13px;margin:0 6px 6px 0;border:1px solid var(--line);background:#fff;border-radius:20px;font-size:13px;cursor:pointer;color:var(--ink)}
.fbtn:hover{border-color:var(--brand)}
.fbtn.active{background:var(--brand);color:#fff;border-color:var(--brand)}
#results .thumb{cursor:pointer}
#results .thumb.sel{outline:3px solid var(--brand);outline-offset:-3px}
.stage{margin:0 0 18px;text-align:center}
.stage .hint{color:var(--muted);font-size:14px;text-align:center;padding:28px;background:#fff;border:1px dashed var(--line);border-radius:12px}
.stage-img{max-width:100%;max-height:68vh;display:block;margin:0 auto;border-radius:10px}
.cmp{position:relative;display:inline-block;max-width:100%;max-height:68vh;user-select:none;touch-action:none}
.cmp .before{display:block;max-width:100%;max-height:68vh}
.cmp .after{position:absolute;top:0;left:0;height:100%;width:50%;overflow:hidden}
.cmp .after img{height:100%;max-width:none;display:block}
.cmp .divider{position:absolute;top:0;bottom:0;left:50%;width:3px;margin-left:-1.5px;background:#fff;cursor:ew-resize;box-shadow:0 0 8px rgba(0,0,0,.6)}
.cmp .divider::after{content:'⇄';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;color:#333;border-radius:50%;width:32px;height:32px;text-align:center;line-height:32px;font-size:16px}
.cmp .label{position:absolute;top:10px;color:#fff;background:rgba(0,0,0,.55);padding:3px 10px;border-radius:12px;font-size:12px}