:root{
    --bg:#f4f5fb;
    --card:#ffffff;
    --line:#e3e5f0;
    --txt:#1d2130;
    --sub:#6a7087;
    --accent:#4f46e5;
    --accent2:#7c3aed;
    --ok:#10b981;
    --err:#ef4444;
    --warn-bg:#fff7ed;
    --warn-line:#fde0c0;
    --warn-txt:#9a5b12;
}
*{box-sizing:border-box;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(--txt);line-height:1.65;
    -webkit-font-smoothing:antialiased;
}
.wrap{max-width:840px;margin:0 auto;padding:0 16px 48px}

/* 头部 */
.hero{background:linear-gradient(135deg,#4f46e5 0%,#7c3aed 55%,#a855f7 100%);color:#fff;padding:34px 0 30px;text-align:center}
.hero h1{font-size:27px;letter-spacing:.3px}
.hero .subtitle{margin-top:8px;font-size:14px;opacity:.92}
.badges{margin-top:14px;display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.badge{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);border-radius:999px;padding:3px 13px;font-size:12px}

/* 模式 tab */
.tabs{display:flex;gap:8px;margin:22px 0 4px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:6px}
.tab{flex:1;padding:10px 8px;border:none;border-radius:10px;background:transparent;font-size:14px;color:var(--sub);cursor:pointer;font-weight:600;transition:.15s}
.tab:hover{background:#f0f1fa;color:var(--txt)}
.tab.active{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 3px 10px rgba(79,70,229,.3)}
.mode-hint{font-size:13px;color:var(--sub);margin:8px 4px 14px}

/* 卡片 */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:14px;box-shadow:0 1px 3px rgba(30,34,60,.04)}
.drop-card{border:2px dashed #c7cbf0;text-align:center;cursor:pointer;background:#fbfbff;transition:.18s;padding:34px 16px}
.drop-card:hover,.drop-card.dragover{border-color:var(--accent);background:#f4f3ff}
.drop-icon{font-size:38px}
.drop-title{font-size:16px;font-weight:600;margin-top:8px}
.drop-sub{font-size:12.5px;color:var(--sub);margin-top:6px}

/* 文件列表 */
.list-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.list-head h3{font-size:15px}
.count{font-size:12px;color:var(--sub);font-weight:400;margin-left:4px}
.list-actions{display:flex;gap:8px}
.btn{border:1px solid var(--line);background:#fff;border-radius:9px;padding:6px 12px;font-size:12.5px;cursor:pointer;color:var(--txt)}
.btn:hover{background:#f4f5fa}
.btn.danger{color:var(--err)}
.btn.danger:hover{background:#fef2f2;border-color:#f5c6c6}
.file-list{list-style:none}
.file-list li{
    display:flex;align-items:center;gap:10px;padding:9px 10px;border:1px solid var(--line);
    border-radius:10px;margin-bottom:7px;background:#fff;transition:box-shadow .15s,opacity .15s;
}
.file-list li.dragging{opacity:.45;box-shadow:0 4px 14px rgba(30,34,60,.15)}
.file-list li.drag-over{border-color:var(--accent);background:#f4f3ff}
.drag-handle{cursor:grab;color:#b3b8cc;font-size:14px;user-select:none;padding:0 2px}
.drag-handle:active{cursor:grabbing}
.order{background:var(--accent);color:#fff;min-width:22px;height:22px;border-radius:6px;font-size:11.5px;display:flex;align-items:center;justify-content:center;padding:0 5px;flex-shrink:0}
.fname{flex:1;font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fsize{font-size:12px;color:var(--sub);flex-shrink:0}
.rm{cursor:pointer;border:none;background:#f2f2f8;color:var(--sub);width:24px;height:24px;border-radius:7px;font-size:13px;flex-shrink:0}
.rm:hover{background:#fee2e2;color:var(--err)}
.tip{font-size:12.5px;color:var(--sub);background:#f6f7fb;border:1px solid var(--line);border-radius:9px;padding:8px 11px;margin-top:10px}
.tip.warn{background:var(--warn-bg);border-color:var(--warn-line);color:var(--warn-txt)}

/* 进度 */
.status-line{display:flex;justify-content:space-between;align-items:center;font-size:13.5px;margin-bottom:10px}
.eta{color:var(--sub);font-size:12px}
.progress-container{height:10px;background:#eceef7;border-radius:999px;overflow:hidden}
.progress-bar{height:100%;width:0%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:999px;transition:width .25s ease}

/* 结果 */
#resultList .rfile{display:flex;align-items:center;gap:10px;margin-bottom:8px;font-size:13.5px}
.dl-btn{display:inline-block;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;text-decoration:none;border-radius:9px;padding:7px 14px;font-size:13px;margin-left:auto}
.dl-btn:hover{filter:brightness(1.08)}

/* 开始按钮 */
.actions{margin-top:4px}
.run-btn{width:100%;border:none;background:linear-gradient(135deg,#4f46e5,#7c3aed);color:#fff;border-radius:13px;padding:15px;font-size:16px;font-weight:700;cursor:pointer;box-shadow:0 6px 18px rgba(79,70,229,.32)}
.run-btn:hover:not(:disabled){filter:brightness(1.07);transform:translateY(-1px)}
.run-btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}

/* 说明 */
.info{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin-top:18px}
.info h3{font-size:15px;margin:14px 0 8px}
.info h3:first-child{margin-top:0}
.info p{font-size:13.5px;color:#3c4156;margin-bottom:10px}

.foot{text-align:center;color:var(--sub);font-size:12.5px;margin-top:24px}
.foot a{color:var(--accent);text-decoration:none}

@media(max-width:640px){
    .hero h1{font-size:22px}
    .tabs{gap:4px;padding:4px}
    .tab{font-size:13px;padding:8px 4px}
    .fname{font-size:12.5px}
}