:root{--pg-app-vh: 100dvh;--pg-chat-footer-h: 96px;--pg-footer-lift: 0px;--pg-footer-offset-top: 0px;--pg-footer-obscured-bottom: 0px;--ocean-500: #1a78ff;--ocean-600: #0f5fd6;--lagoon-500: #22d3ee;--sand-200: #fde68a;--ink-900: #0f172a;--ink-700: #334155;--ink-500: #64748b;--ink-200: #e2e8f0;--paper: #f8fafc;--glass: rgba(255, 255, 255, .78);--shadow: 0 28px 65px -40px rgba(15, 23, 42, .55)}*{box-sizing:border-box}html,body{width:100%;height:var(--pg-app-vh)}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans CJK SC,Source Han Sans SC,sans-serif;color:var(--ink-900);background:linear-gradient(150deg,#dbeafe,#ecfeff 40%,#fef9c3);min-height:var(--pg-app-vh);height:var(--pg-app-vh);display:flex;justify-content:center;padding:calc(env(safe-area-inset-top,0px) + 12px) 12px calc(env(safe-area-inset-bottom,0px) + 12px);position:relative;overflow-x:hidden}#app{width:100%;min-height:0;flex:1 1 auto;display:flex;justify-content:center}body:before,body:after{content:"";position:fixed;width:320px;height:320px;border-radius:50%;z-index:-1;filter:blur(0px);opacity:.35}body:before{top:-120px;right:-80px;background:radial-gradient(circle at center,#38bdf8,transparent 70%)}body:after{bottom:-140px;left:-60px;background:radial-gradient(circle at center,#facc15,transparent 70%)}.chat-shell{width:min(1400px,calc(100vw - 24px));height:calc(var(--pg-app-vh) - env(safe-area-inset-top,0px) - env(safe-area-inset-bottom,0px) - 24px);max-height:none;background:var(--glass);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-radius:30px;box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden;border:1px solid rgba(255,255,255,.65);animation:shellIn .6s ease}@keyframes shellIn{0%{transform:translateY(12px);opacity:0}to{transform:translateY(0);opacity:1}}.chat-header{padding:18px 20px;background:linear-gradient(135deg,#0ea5e9,#1d4ed8);color:#fff;display:flex;align-items:center;gap:14px;position:relative;overflow:hidden}.chat-header:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.35),transparent 55%);opacity:.6}.chat-header>*{position:relative;z-index:1}.avatar{width:48px;height:48px;border-radius:16px;background:#ffffff40;display:flex;align-items:center;justify-content:center;font-weight:700;letter-spacing:1px;overflow:hidden}.avatar img{width:100%;height:100%;-o-object-fit:cover;object-fit:cover}.header-info{flex:1}.header-info h1{margin:0;font-size:18px;font-weight:700}.header-info p{margin:4px 0 0;font-size:12px;opacity:.9}.status-pill{font-size:11px;padding:5px 12px;border-radius:999px;background:#ffffff38}.chat-body{flex:1;display:flex;flex-direction:column;min-height:0;background:linear-gradient(180deg,#fff9,#f8fafcf2)}.message-list{flex:1;overflow-y:auto;padding:20px 18px 12px;scroll-padding-bottom:120px}.message-row{display:flex;gap:10px;margin-bottom:18px;animation:messageIn .32s ease both}@keyframes messageIn{0%{transform:translateY(8px);opacity:0}to{transform:translateY(0);opacity:1}}.message-row.outgoing{flex-direction:row-reverse}.message-content{max-width:72%;min-width:0;display:flex;flex-direction:column;align-items:flex-start}.message-row.outgoing .message-content{align-items:flex-end}.bubble{max-width:100%;display:inline-block;padding:12px 16px;border-radius:18px 18px 18px 6px;font-size:14px;line-height:1.6;background:#fff;color:var(--ink-900);box-shadow:0 16px 35px -30px #0f172a66;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;position:relative}.bubble.outgoing{background:linear-gradient(135deg,#1a78ff,#38bdf8);color:#fff;border-radius:18px 18px 6px}.bubble img,.bubble video,.bubble audio{max-width:100%;border-radius:12px}.chat-image{cursor:zoom-in;display:block;width:180px;height:180px;-o-object-fit:cover;object-fit:cover}.bubble video,.bubble audio{width:100%}.file-card{display:flex;gap:12px;align-items:center}.file-icon{width:36px;height:36px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:#0f172a14;font-size:18px}.file-info{flex:1;display:flex;flex-direction:column;gap:4px}.file-name{font-weight:600;font-size:13px}.file-size{font-size:11px;opacity:.75}.file-download{padding:6px 10px;border-radius:999px;border:1px solid rgba(15,23,42,.15);font-size:11px;text-decoration:none;color:inherit;background:#0f172a14}.bubble.outgoing .file-icon{background:#fff3}.bubble.outgoing .file-download{border-color:#ffffff59;background:#fff3;color:#fff}.message-time{font-size:10px;color:var(--ink-500);margin-top:6px;text-align:left}.message-row.outgoing .message-time{text-align:right}.empty-tip{text-align:center;padding:30px 12px;color:var(--ink-500);font-size:12px}.chat-footer{padding:12px 14px 14px;border-top:1px solid #e5e7eb;background:#fff;display:flex;flex-direction:column;gap:8px;flex-shrink:0;position:sticky;bottom:0;z-index:6;box-shadow:0 -10px 24px -22px #0f172a59}.toolbar{display:flex;gap:8px;align-items:center;font-size:12px;color:var(--ink-500)}.tool-btn{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:999px;background:#f3f4f6;border:1px solid #edf2f7;cursor:pointer;transition:transform .2s ease,background .2s ease;font-size:16px}.tool-btn:hover{transform:translateY(-1px);background:#e5e7eb}.tool-btn input{display:none}.emoji-panel{display:none;flex-wrap:wrap;gap:6px;padding:12px;border-radius:16px;background:#fff;border:1px solid rgba(15,23,42,.08);max-height:160px;overflow-y:auto}.emoji-panel.active{display:flex}.emoji-item{font-size:20px;cursor:pointer}.input-area{display:flex;gap:8px;align-items:center}textarea{flex:1;resize:none;height:44px;border-radius:22px;border:1px solid #e5e7eb;padding:10px 14px;font-size:14px;line-height:20px;outline:none;background:#fff;transition:border .2s ease,box-shadow .2s ease}textarea:focus{border-color:#93c5fd;box-shadow:0 0 0 4px #3b82f626}.send-btn{background:linear-gradient(135deg,#3b82f6,#22d3ee);border:none;color:#fff;border-radius:18px;min-width:78px;height:44px;padding:0 14px;font-weight:600;font-size:14px;cursor:pointer;box-shadow:0 12px 30px -24px #1a78ffcc;transition:transform .2s ease}.send-btn:hover{transform:translateY(-1px)}.send-btn:disabled{opacity:.6;cursor:not-allowed}.toast{position:fixed;left:50%;transform:translate(-50%);bottom:24px;background:#0f172ae0;color:#fff;padding:8px 16px;border-radius:999px;font-size:12px;opacity:0;transition:opacity .2s ease;pointer-events:none}.toast.show{opacity:1}.loading-mask{position:fixed;top:0;right:0;bottom:0;left:0;z-index:900;display:flex;align-items:center;justify-content:center;padding:16px;background:#f8fafcb8;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.loading-card{width:min(320px,calc(100vw - 32px));border-radius:18px;background:#ffffffeb;border:1px solid rgba(15,23,42,.06);box-shadow:0 18px 36px -26px #0f172a52;padding:16px 14px 14px;text-align:center}.loading-spinner{width:28px;height:28px;margin:0 auto 10px;border-radius:999px;border:2px solid rgba(59,130,246,.18);border-top-color:#3b82f6;animation:loadingSpin .9s linear infinite}.loading-title{font-size:14px;font-weight:600;color:var(--ink-900)}.loading-desc{margin-top:4px;font-size:12px;color:var(--ink-500)}.loading-progress{margin-top:12px;height:4px;border-radius:999px;background:#94a3b82e;overflow:hidden;position:relative}.loading-progress>span{position:absolute;inset:0 auto 0 0;width:42%;border-radius:inherit;background:linear-gradient(90deg,#3b82f6,#22d3ee);animation:loadingProgressSlide 1.15s ease-in-out infinite}@keyframes loadingSpin{to{transform:rotate(360deg)}}@keyframes loadingProgressSlide{0%{transform:translate(-110%)}60%{transform:translate(155%)}to{transform:translate(155%)}}.image-preview-mask{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;background:#0f172ad1;display:flex;align-items:center;justify-content:center;padding:16px}.image-preview-img{max-width:min(1200px,94vw);max-height:90dvh;-o-object-fit:contain;object-fit:contain;border-radius:12px;box-shadow:0 24px 56px -28px #000000a6;background:#0b1220}.image-preview-close{position:absolute;top:calc(env(safe-area-inset-top,0px) + 12px);right:12px;height:34px;min-width:60px;border:0;border-radius:999px;padding:0 12px;background:#ffffff29;color:#fff;font-size:12px;cursor:pointer}@media (max-width: 768px){body{padding:0;overflow:hidden}#app{display:block;width:100%;height:var(--pg-app-vh)}.chat-shell{width:100%;height:var(--pg-app-vh);max-height:none;border-radius:0;border:0}.chat-body{min-height:0;overflow:hidden}.message-list{padding:14px 12px 8px;padding-bottom:calc(var(--pg-chat-footer-h) + var(--pg-footer-obscured-bottom) + 8px);scroll-padding-bottom:calc(var(--pg-chat-footer-h) + var(--pg-footer-obscured-bottom))}.chat-footer{position:fixed;left:0;right:0;bottom:var(--pg-footer-lift);z-index:20;width:100%;transform:translate3d(0,var(--pg-footer-offset-top),0);padding:6px 8px calc(env(safe-area-inset-bottom,0px) + 6px);gap:4px;border-top:1px solid #e5e7eb;box-shadow:0 -10px 24px -22px #0f172a59}.toolbar{gap:4px;min-height:26px}.tool-btn{width:26px;height:26px;font-size:13px}.emoji-panel{padding:6px;max-height:120px;gap:4px}.emoji-item{font-size:18px;line-height:1}.input-area{gap:4px}textarea{height:38px;border-radius:16px;padding:7px 11px;line-height:18px}.send-btn{min-width:62px;height:38px;border-radius:14px;padding:0 10px;font-size:13px}}