*{box-sizing:border-box}body{margin:0;padding:16px;background:#f4f6f9;color:#222;font:16px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;overflow-x:hidden}main{max-width:900px;margin:auto}img{display:block;width:100%;height:auto;max-width:100%;border-radius:12px;object-fit:contain}.intro p{margin:10px 0}.accent{color:var(--accent)}.step-card{background:#fff;border-radius:16px;padding:20px;margin:16px 0;box-shadow:0 2px 10px #00000012;border:1px solid #e8ebf0}.step-title{font-size:24px;font-weight:700;color:var(--accent);padding-bottom:10px;border-bottom:1px solid #eee;margin-bottom:14px}.cover-card{background:#fff;border-radius:16px;padding:14px;margin-bottom:16px;box-shadow:0 2px 10px #00000012}.cover-card img{max-height:360px}.topic-wrap{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}.topic-item{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:7px 9px;background:#f7f8fa;border-radius:7px;min-width:0}.topic-item span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.copy-btn{border:0;border-radius:6px;padding:6px 12px;background:var(--button);color:#fff;font-size:15px;white-space:nowrap}.upload-card{background:#fff;border-radius:24px;padding:28px 24px;margin:24px 0;box-shadow:0 2px 12px #0000000f}.upload-title{font-size:23px;font-weight:700;margin-bottom:22px}.upload-box{border:2px dashed #c9ccd2;border-radius:16px;padding:32px 16px;text-align:center;margin-bottom:24px}.upload-tip{font-size:20px;margin-bottom:16px}.file-select{padding:8px 20px;border:0;border-radius:20px;background:#e9edf2;font-size:16px}.count{margin-top:12px;color:#666;font-size:18px}.submit{width:100%;padding:18px 0;background:var(--submit);color:#fff;border:0;border-radius:50px;font-size:22px;font-weight:700;margin-bottom:20px}.notice{background:#fff3f3;border-left:4px solid #ed3838;border-radius:12px;padding:16px;color:var(--accent);font-size:18px}.demo{margin:26px 0;text-align:center;color:#228b3c;font-weight:700;font-size:20px}.demo img{margin-top:12px}.toast{display:none;position:fixed;left:50%;top:45%;transform:translate(-50%,-50%);background:#000c;color:#fff;padding:12px 26px;border-radius:8px;z-index:5}.loading{text-align:center;padding:30px;color:#666}@media(max-width:560px){.step-title{font-size:22px}.upload-card{padding:24px 16px}}
/* 两列布局下允许长话题换行，避免关键词被截断 */
.topic-item span{overflow-wrap:anywhere;white-space:normal}
.notice{padding:12px 10px;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:clip;text-align:center}
@media(max-width:560px){.notice{padding:10px 6px;font-size:11px}}
.queue-image-wrap{position:relative}.queue-image-wrap img{cursor:pointer}.image-message{text-align:center;color:var(--accent);font-weight:700;padding:14px 0}