:root{--bg: #0f1115;--bg-panel: #171a21;--bg-hover: #1e222b;--border: #2a2f3a;--text: #e8eaf0;--text-dim: #9aa3b2;--accent: #4f8cff;--accent-2: #22c1a4;--danger: #ff5c5c;--radius: 12px}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%}body{font-family:PingFang SC,Microsoft YaHei,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}button{font-family:inherit}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-thumb{background:#2e3442;border-radius:4px}::-webkit-scrollbar-track{background:transparent}.app{max-width:1200px;margin:0 auto;padding:28px 20px 60px}.app-header{display:flex;align-items:center;gap:14px;margin-bottom:24px}.logo{width:50px;height:50px;display:grid;place-items:center;font-size:26px;background:linear-gradient(135deg,var(--accent),var(--accent-2));border-radius:14px;box-shadow:0 4px 20px #4f8cff59;flex-shrink:0}.app-header h1{font-size:22px;font-weight:700;letter-spacing:.5px}.app-header p{color:var(--text-dim);font-size:13px;margin-top:4px}.layout{display:grid;grid-template-columns:380px minmax(0,1fr);gap:20px;align-items:start}.col-left,.col-right{display:flex;flex-direction:column;gap:16px;min-width:0}.card{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.card-title{font-size:15px;margin-bottom:14px}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:36px 16px;text-align:center;cursor:pointer;transition:all .2s ease;background:var(--bg-panel)}.dropzone:hover{border-color:var(--accent);background:var(--bg-hover)}.dropzone.over{border-color:var(--accent);background:#4f8cff14;transform:scale(1.01)}.dz-icon{font-size:34px;margin-bottom:10px}.dz-main{font-size:15px;font-weight:600}.dz-sub{font-size:12px;color:var(--text-dim);margin-top:6px}.il-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:13px;color:var(--text-dim)}.il-head b{color:var(--text)}.btn-link{background:none;border:none;color:var(--danger);font-size:12px;cursor:pointer;padding:0}.btn-link:hover{text-decoration:underline}.image-list ul{list-style:none;max-height:280px;overflow-y:auto;display:flex;flex-direction:column;gap:6px}.image-list li{display:flex;align-items:center;gap:10px;background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:8px 10px}.image-list li img{width:40px;height:40px;-o-object-fit:contain;object-fit:contain;border-radius:6px;background:repeating-conic-gradient(#2a2f3a 0% 25%,#1e222b 0% 50%) 0 0 / 12px 12px;flex-shrink:0}.il-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.il-name{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.il-size{font-size:11px;color:var(--text-dim)}.il-remove{width:24px;height:24px;border-radius:6px;border:none;background:transparent;color:var(--text-dim);cursor:pointer;font-size:12px;flex-shrink:0}.il-remove:hover{background:#ff5c5c26;color:var(--danger)}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field>span{font-size:13px;color:var(--text-dim)}.field input[type=text],.field input[type=number]{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:8px 10px;color:var(--text);font-size:14px;outline:none;width:100%}.field input:focus{border-color:var(--accent)}.seg{display:flex;background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:3px}.seg button{flex:1;padding:7px 0;border:none;background:transparent;color:var(--text-dim);font-size:13px;border-radius:7px;cursor:pointer;transition:all .15s}.seg button.active{background:var(--accent);color:#fff;font-weight:600}.check{display:flex;align-items:center;gap:8px;font-size:14px;margin-bottom:10px;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none}.check input{accent-color:var(--accent);width:16px;height:16px;cursor:pointer;flex-shrink:0}.preview-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:10px}.preview-head h3{font-size:15px}.preview-meta{font-size:12px;color:var(--text-dim);white-space:nowrap}.preview-box{min-height:340px;border-radius:10px;border:1px solid var(--border);display:grid;place-items:center;padding:16px;overflow:auto}.preview-empty{color:var(--text-dim);font-size:13px;text-align:center;line-height:2}.preview-box canvas{max-width:100%;image-rendering:pixelated;border-radius:4px;box-shadow:0 4px 24px #0006}.checkerboard{background-color:#191d25;background-image:linear-gradient(45deg,#22262f 25%,transparent 25%),linear-gradient(-45deg,#22262f 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#22262f 75%),linear-gradient(-45deg,transparent 75%,#22262f 75%);background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0}.actions{display:flex;gap:12px}.btn{padding:12px 18px;border-radius:10px;border:none;font-size:14px;font-weight:600;cursor:pointer;transition:all .15s}.btn.primary{background:linear-gradient(135deg,var(--accent),#3a6fe0);color:#fff;flex:1}.btn.primary:hover:not(:disabled){filter:brightness(1.12)}.btn.ghost{background:var(--bg-panel);border:1px solid var(--border);color:var(--text);flex:1}.btn.ghost:hover:not(:disabled){border-color:var(--accent)}.btn:disabled{opacity:.4;cursor:not-allowed}.tip{font-size:12px;color:var(--text-dim);line-height:1.8}@media(max-width:920px){.layout{grid-template-columns:1fr}}