:root{--text:#6b7280;--text-h:#111827;--bg:#fff;--border:#e5e7eb;--accent:#4f46e5;--accent-hover:#4338ca;--accent-bg:#4f46e51f;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;font-family:system-ui,Segoe UI,Roboto,PingFang SC,Microsoft YaHei,sans-serif;font-size:16px;line-height:1.5}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#111827;--border:#2e303a;--accent:#818cf8;--accent-hover:#6366f1;--accent-bg:#818cf826}}*{box-sizing:border-box}body{background:var(--bg);margin:0}h1,h2,h3,p{margin:0}#root{min-height:100svh}.page{flex-direction:column;min-height:100svh;display:flex}.header{justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.logo{color:var(--text-h);letter-spacing:-.2px;font-size:20px;font-weight:700}.lang-btn{border:1px solid var(--border);background:var(--bg);color:var(--text-h);cursor:pointer;border-radius:999px;padding:6px 16px;font-size:15px;transition:border-color .2s,background .2s}.lang-btn:hover{border-color:var(--accent);background:var(--accent-bg)}.main{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;padding:24px;display:flex}.title{letter-spacing:-.6px;max-width:720px;font-size:clamp(28px,5vw,48px);line-height:1.2}.subtitle{color:var(--text);max-width:520px;font-size:17px}.input-row{gap:10px;width:100%;max-width:680px;margin-top:20px;display:flex}.url-input{border:1px solid var(--border);background:var(--bg);color:var(--text-h);border-radius:12px;outline:none;flex:1;padding:14px 18px;font-size:16px;transition:border-color .2s,box-shadow .2s}.url-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}.summarize-btn{background:var(--accent);color:#fff;cursor:pointer;white-space:nowrap;border:none;border-radius:12px;padding:14px 26px;font-size:16px;font-weight:600;transition:background .2s,transform .1s}.summarize-btn:hover{background:var(--accent-hover)}.summarize-btn:active{transform:scale(.98)}.footer{text-align:center;color:var(--text);border-top:1px solid var(--border);padding:16px 24px;font-size:14px}.result-card{border:1px solid var(--border);background:var(--bg);text-align:left;border-radius:16px;width:100%;max-width:680px;margin-top:28px;padding:24px}.result-title{color:var(--text-h);margin-bottom:12px;font-size:18px;font-weight:700}.result-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.result-head .result-title{margin-bottom:0}.result-actions{gap:8px;display:flex}.action-btn{border:1px solid var(--border);background:var(--bg);color:var(--text-h);cursor:pointer;border-radius:8px;padding:5px 12px;font-size:13px;transition:border-color .2s,background .2s}.action-btn:hover{border-color:var(--accent);background:var(--accent-bg)}.result-summary{color:var(--text-h);font-size:16px;line-height:1.6}.result-points{flex-direction:column;gap:8px;margin:16px 0 0;padding-left:20px;display:flex}.result-points li{color:var(--text);font-size:15px;line-height:1.5}.result-error{color:#dc2626;margin-top:16px;font-size:14px}.history-card{border:1px solid var(--border);background:var(--bg);text-align:left;border-radius:16px;width:100%;max-width:680px;margin-top:28px;padding:24px}.history-list{flex-direction:column;gap:16px;margin:0;padding:0;list-style:none;display:flex}.history-item{border:1px solid var(--border);background:var(--social-bg,#f4f3ec80);border-radius:10px;padding:14px}.history-row{justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;display:flex}.history-url{color:var(--accent);word-break:break-all;font-size:13px;text-decoration:none}.history-time{color:var(--text);white-space:nowrap;font-size:12px}.history-summary{color:var(--text-h);font-size:14px;line-height:1.5}.summarize-btn:disabled{opacity:.6;cursor:not-allowed}.input-row{position:relative}.clear-btn{background:var(--border);width:26px;height:26px;color:var(--text);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;font-size:13px;transition:background .2s;display:flex;position:absolute;top:50%;right:150px;transform:translateY(-50%)}.clear-btn:hover{background:var(--accent);color:#fff}.history-item{cursor:pointer;transition:border-color .2s}.history-item:hover{border-color:var(--accent)}.history-toggle{color:var(--text);font-size:12px}.history-points{flex-direction:column;gap:6px;margin:10px 0 0;padding-left:18px;display:flex}.history-points li{color:var(--text);font-size:13px;line-height:1.5}@media (width<=640px){.input-row{flex-direction:column}.summarize-btn{width:100%}.clear-btn{right:14px}.result-head{flex-direction:column;align-items:flex-start}}.loading-wrap{align-items:center;gap:8px;display:inline-flex}.spinner{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:14px;height:14px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}