:root{--bg: #0f0f13;--surface: #16161e;--surface-hover: #1e1e28;--border: #2a2a3a;--text: #e8e8f2;--text-muted: #7878a0;--accent: #6c63ff;--accent-hover: #5850e8;--accent-2: #ff6584;--success: #10b981;--success-hover: #059669;--error: #ef4444;--warning: #f59e0b;--radius: 14px;--radius-sm: 8px;--radius-xs: 4px;--shadow: 0 4px 24px rgba(0, 0, 0, .4);--font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif}@media (prefers-color-scheme: light){:root{--bg: #f2f2f8;--surface: #ffffff;--surface-hover: #f5f5ff;--border: #dddde8;--text: #111128;--text-muted: #6666aa;--shadow: 0 4px 24px rgba(0, 0, 0, .1)}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;min-height:100dvh}img{max-width:100%;height:auto;display:block}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app{display:flex;flex-direction:column;min-height:100dvh}.header{background:linear-gradient(135deg,#1a0a2e,#0f0f13 60%);border-bottom:1px solid var(--border);padding:2rem 1rem;text-align:center}.header-inner{max-width:600px;margin:0 auto}.site-title{font-size:clamp(1.6rem,5vw,2.4rem);font-weight:800;background:linear-gradient(135deg,#6c63ff,#ff6584);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:flex;align-items:center;justify-content:center;gap:.35em}.site-subtitle{color:var(--text-muted);font-size:.95rem;margin-top:.25rem;letter-spacing:.1em}.main{flex:1;max-width:720px;width:100%;margin:0 auto;padding:1.5rem 1rem 3rem;display:flex;flex-direction:column;gap:1.25rem}.input-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:.875rem}.textarea-wrapper{position:relative}textarea{width:100%;resize:none;overflow:hidden;scrollbar-width:none;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text);font-family:var(--font);font-size:.9rem;line-height:1.6;padding:1rem 2.5rem 1.25rem 1rem;outline:none;transition:border-color .2s}textarea:focus{border-color:var(--accent)}textarea::placeholder{color:var(--text-muted);font-size:.85rem}textarea:disabled{opacity:.6;cursor:not-allowed}textarea::-webkit-scrollbar{width:0;height:0;display:none}.btn-clear{position:absolute;top:.5rem;right:.5rem;background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:.85rem;padding:.25rem .4rem;border-radius:var(--radius-xs);line-height:1;transition:color .15s}.btn-clear:hover{color:var(--error)}.url-preview{display:flex;flex-wrap:wrap;gap:.4rem;align-items:center}.url-preview-label{font-size:.78rem;color:var(--success);font-weight:600;white-space:nowrap}.url-chip{font-size:.72rem;background:#6c63ff1f;border:1px solid rgba(108,99,255,.3);color:var(--accent);border-radius:100px;padding:.15rem .6rem;max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.input-actions{display:flex;gap:.75rem;flex-wrap:wrap}.btn-primary,.btn-secondary,.btn-success{display:inline-flex;align-items:center;gap:.4em;border:none;cursor:pointer;font-family:var(--font);font-weight:600;border-radius:var(--radius-sm);transition:all .18s;white-space:nowrap;padding:.65rem 1.25rem;font-size:.9rem;text-decoration:none}.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}.btn-primary:hover:not(:disabled){filter:brightness(1.1);transform:translateY(-1px);text-decoration:none}.btn-primary:disabled{opacity:.55;cursor:not-allowed;transform:none}.btn-secondary{background:var(--surface-hover);border:1px solid var(--border);color:var(--text)}.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){background:var(--success-hover)}.btn-success:disabled{opacity:.55;cursor:not-allowed}.btn-sm{padding:.4rem .875rem;font-size:.82rem}.spinner{display:inline-block;width:1em;height:1em;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .65s linear infinite;flex-shrink:0}.spinner-lg{width:2rem;height:2rem;border-width:3px}@keyframes spin{to{transform:rotate(360deg)}}.loading-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:2.5rem;text-align:center;display:flex;flex-direction:column;align-items:center;gap:1rem;box-shadow:var(--shadow);color:var(--text-muted)}.result-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:1rem}.result-header{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}.platform-badge,.media-type-badge{font-size:.72rem;font-weight:700;padding:.2rem .65rem;border-radius:100px;letter-spacing:.03em}.platform-douyin{background:#000000d9;color:#fff}.platform-xiaohongshu{background:#ff2442;color:#fff}.platform-kuaishou{background:#ff5000;color:#fff}.media-type-badge{background:#6c63ff26;color:var(--accent);border:1px solid rgba(108,99,255,.3)}.result-title{font-size:.95rem;line-height:1.5;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.result-actions{display:flex;gap:.75rem;flex-wrap:wrap}.hint{font-size:.78rem;color:var(--text-muted);line-height:1.5;padding:.5rem .75rem;background:#6c63ff0f;border-left:3px solid var(--accent);border-radius:0 var(--radius-xs) var(--radius-xs) 0}.video-cover-wrapper{position:relative;border-radius:var(--radius-sm);overflow:hidden;max-height:400px;display:flex;justify-content:center;align-items:center;background:#000}.video-cover{width:100%;max-height:400px;object-fit:contain;opacity:.85}.play-overlay{position:absolute;font-size:3rem;pointer-events:none;text-shadow:0 2px 8px rgba(0,0,0,.8)}.image-toolbar{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}.checkbox-label{display:inline-flex;align-items:center;gap:.4em;font-size:.85rem;cursor:pointer;-webkit-user-select:none;user-select:none;color:var(--text-muted)}.checkbox-label input[type=checkbox]{width:1em;height:1em;cursor:pointer;accent-color:var(--accent)}.image-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:.75rem}@media (max-width: 400px){.image-grid{grid-template-columns:repeat(2,1fr)}}.image-item{position:relative;border-radius:var(--radius-sm);overflow:hidden;cursor:pointer;aspect-ratio:3/4;background:var(--border);border:2px solid transparent;transition:border-color .15s,transform .15s}.image-item:hover{transform:scale(1.02)}.image-item.selected{border-color:var(--accent)}.image-item img{width:100%;height:100%;object-fit:cover}.image-overlay{position:absolute;top:.4rem;left:.4rem;display:flex;gap:.35rem;align-items:center}.image-index{background:#0009;color:#fff;font-size:.7rem;padding:.1rem .35rem;border-radius:var(--radius-xs);font-weight:700}.image-overlay input[type=checkbox]{width:1.1em;height:1.1em;cursor:pointer;accent-color:var(--accent)}.btn-download-single{position:absolute;bottom:.4rem;right:.4rem;background:#000000a6;color:#fff;border:none;cursor:pointer;font-size:1rem;width:2rem;height:2rem;border-radius:var(--radius-xs);display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .15s}.image-item:hover .btn-download-single{opacity:1}.progress-bar-wrapper{position:relative;background:var(--border);border-radius:100px;height:6px;overflow:hidden}.progress-bar{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:100px;transition:width .3s}.progress-label{display:block;font-size:.75rem;color:var(--text-muted);margin-top:.3rem;text-align:center}.error-card{background:var(--surface);border:1px solid rgba(239,68,68,.35);border-radius:var(--radius);padding:1.25rem;display:flex;gap:1rem;align-items:flex-start;box-shadow:var(--shadow)}.error-icon{font-size:1.5rem;flex-shrink:0;line-height:1}.error-content{flex:1;display:flex;flex-direction:column;gap:.4rem}.error-message{font-size:.9rem;color:var(--error);line-height:1.5}.error-hint{font-size:.8rem;color:var(--text-muted);line-height:1.5}.footer{border-top:1px solid var(--border);padding:1.25rem 1rem;text-align:center;font-size:.76rem;color:var(--text-muted);line-height:1.8}.footer-links{margin-top:.25rem}.footer-links a{color:var(--text-muted)}.footer-links a:hover{color:var(--accent)}