:root{--blue:#174178;--muted:#64748b;--line:#dbe3ee;--bg:#eef4fb;--text:#172033}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:var(--bg)}.bg{position:fixed;inset:0;background:radial-gradient(circle at 20% 10%,#dbeafe 0,transparent 34%),linear-gradient(135deg,#f8fafc,#eef4fb);z-index:-1}header{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;background:#174178;color:white;box-shadow:0 8px 28px rgba(15,23,42,.14)}header b{display:block;font-size:23px}header span{display:block;color:#dbeafe;margin-top:4px;font-size:13px}button{border:0;border-radius:12px;padding:11px 14px;background:#1d4ed8;color:white;font-weight:900;cursor:pointer}button:hover{filter:brightness(1.05)}button.danger{background:#be123c}button:disabled{opacity:.55;cursor:not-allowed}main{max-width:1500px;margin:0 auto;padding:18px}.login-card{width:min(430px,100%);margin:10vh auto;background:white;border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:0 20px 60px rgba(15,23,42,.12);text-align:center}.login-card h1{margin:0 0 8px}.login-card p{color:var(--muted);line-height:1.7}.login-card input{width:100%;border:1px solid var(--line);border-radius:12px;padding:13px 14px;font-size:16px}.login-card button{width:100%;margin-top:14px}.msg{min-height:22px;color:#be123c;margin-top:10px}.hidden{display:none!important}.app{display:grid;grid-template-columns:280px minmax(0,1fr) 320px;gap:14px}.panel{background:white;border:1px solid var(--line);border-radius:20px;padding:16px;box-shadow:0 12px 35px rgba(15,23,42,.07)}.controls{display:flex;flex-direction:column;gap:10px}.controls h2,.files h2{margin:0 0 4px}.hint{background:#f8fafc;border:1px solid var(--line);border-radius:14px;padding:12px;color:var(--muted);font-size:13px;line-height:1.65}.hint ol{margin:8px 0 0;padding-left:18px}.status{background:#eef4fb;border-radius:12px;padding:10px;font-size:13px;color:#334155;white-space:pre-wrap}.viewer{min-height:720px}.viewer-head{display:flex;justify-content:space-between;align-items:center;gap:10px}.viewer-head h2{margin:0}.viewer-head span,.viewer-tip{color:var(--muted);font-size:13px}#shot{display:block;width:100%;min-height:620px;object-fit:contain;background:#0f172a;border-radius:16px;margin-top:12px;border:1px solid #0f172a;cursor:crosshair}.file-list{display:grid;gap:10px}.file{border:1px solid var(--line);border-radius:14px;padding:12px;background:#f8fafc}.file b{display:block;word-break:break-all}.file span{display:block;color:var(--muted);font-size:12px;margin:5px 0 10px}.file a{display:inline-block;text-decoration:none;border-radius:10px;background:#174178;color:white;padding:8px 11px;font-weight:900}.empty{color:var(--muted);padding:14px;border:1px dashed var(--line);border-radius:12px;background:#f8fafc}@media(max-width:1100px){.app{grid-template-columns:1fr}.viewer{min-height:500px}#shot{min-height:420px}}@media(max-width:560px){header{padding:14px;align-items:flex-start;gap:10px}header b{font-size:19px}main{padding:10px}.panel{border-radius:16px;padding:12px}#shot{min-height:360px}.login-card{margin:7vh auto;padding:20px}}