:root{color-scheme:light;--bg:#f4f6f8;--panel:#fff;--ink:#17212b;--muted:#687684;--line:#e4e9ed;--brand:#176b5b;--brand2:#238572;--danger:#c23b43;--soft:#e8f4f1;--shadow:0 12px 40px rgba(24,49,43,.10)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg)}button,input{font:inherit}button{cursor:pointer}.hidden{display:none!important}.shell{min-height:100vh;display:grid;place-items:center;padding:24px}.card{width:min(430px,100%);background:var(--panel);padding:32px;border-radius:22px;box-shadow:var(--shadow);border:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:var(--brand);color:#fff;font-size:22px}.brand h1{font-size:22px;margin:0}.muted{color:var(--muted)}.field{display:flex;flex-direction:column;gap:7px;margin:22px 0}.field input{width:100%;border:1px solid #ccd5da;border-radius:12px;padding:13px 14px;background:#fff;outline:none}.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,107,91,.12)}.primary,.secondary,.danger{border:0;border-radius:12px;padding:12px 16px;font-weight:650}.primary{background:var(--brand);color:#fff}.primary:hover{background:var(--brand2)}.secondary{background:#edf1f3;color:var(--ink)}.danger{background:#fff0f0;color:var(--danger)}.full{width:100%}.status{min-height:22px;color:var(--danger);font-size:14px;margin-top:10px}.home-copy{line-height:1.7;margin:22px 0 0}.chat-layout{height:100dvh;display:grid;grid-template-columns:minmax(0,1fr) 320px;max-width:1200px;margin:auto;background:var(--panel);box-shadow:var(--shadow)}.chat-main{min-width:0;display:flex;flex-direction:column}.chat-header{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 22px;border-bottom:1px solid var(--line);gap:16px}.chat-header h1{font-size:18px;margin:0}.online{font-size:13px;color:var(--muted);white-space:nowrap}.messages{flex:1;overflow:auto;padding:18px 7%;scroll-behavior:smooth}.history-button{display:block;margin:0 auto 14px;border:0;color:var(--brand);background:transparent}.message{margin:0 0 18px;max-width:78%}.message.mine{margin-left:auto}.message-head{display:flex;gap:8px;align-items:baseline;font-size:12px;color:var(--muted);margin:0 6px 5px}.mine .message-head{justify-content:flex-end}.bubble{display:inline-block;background:#eef2f3;padding:10px 13px;border-radius:5px 16px 16px 16px;line-height:1.55;word-break:break-word;white-space:pre-wrap}.mine .bubble{background:var(--soft);border-radius:16px 5px 16px 16px;float:right}.message::after{content:"";display:block;clear:both}.bubble img{display:block;max-width:min(360px,64vw);max-height:320px;border-radius:10px;cursor:zoom-in}.voice-player{display:flex;align-items:center;gap:10px;min-width:150px}.voice-player button{border:0;background:var(--brand);color:#fff;width:34px;height:34px;border-radius:50%}.system-message{text-align:center;color:var(--muted);font-size:13px;margin:12px}.composer{border-top:1px solid var(--line);padding:12px 16px;background:#fff}.composer-row{display:flex;gap:8px;align-items:flex-end}.icon-button{border:0;background:#eef2f3;border-radius:11px;min-width:42px;height:42px;font-size:19px}.composer input[type=text]{flex:1;border:1px solid #d4dce0;border-radius:12px;padding:11px 13px;outline:none}.send{height:42px;padding:0 18px}.emoji-panel{display:flex;flex-wrap:wrap;gap:4px;padding:8px 0}.emoji-panel button{border:0;background:transparent;font-size:22px;padding:5px}.recording{display:flex;align-items:center;gap:10px;color:var(--danger);font-size:14px;padding:8px 0}.pulse{width:9px;height:9px;border-radius:50%;background:var(--danger);animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.25}}.voice-panel{border-left:1px solid var(--line);padding:20px;overflow:auto}.voice-panel h2{font-size:17px;margin:0 0 4px}.voice-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:18px 0}.voice-actions button{padding:10px 8px}.member-list{list-style:none;padding:0;margin:14px 0}.member{display:flex;align-items:center;gap:9px;padding:10px 4px;border-bottom:1px solid var(--line)}.member-dot{width:10px;height:10px;border-radius:50%;background:#aab3b9}.member.voice .member-dot{background:#74a89d}.member.speaking .member-dot{background:#20b76c;box-shadow:0 0 0 4px rgba(32,183,108,.14)}.member-name{flex:1;font-size:14px}.speaking-label{font-size:12px;color:#16804e}.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);background:#17212b;color:#fff;padding:10px 16px;border-radius:10px;z-index:20;font-size:14px}.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.85);display:grid;place-items:center;z-index:30;padding:20px}.lightbox img{max-width:100%;max-height:100%;object-fit:contain}.admin-shell{max-width:980px;margin:40px auto;padding:0 20px}.admin-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.admin-grid{display:grid;grid-template-columns:280px 1fr;gap:20px}.admin-panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.room-row{padding:15px 0;border-bottom:1px solid var(--line)}.room-row:last-child{border:0}.room-row h3{font-size:15px;margin:0 0 7px}.room-meta{font-size:12px;color:var(--muted);line-height:1.7}.room-buttons{display:flex;flex-wrap:wrap;gap:7px;margin-top:9px}.room-buttons button{padding:7px 10px;border-radius:9px;border:0}.created-link{word-break:break-all;background:var(--soft);padding:10px;border-radius:9px;font-size:13px}.badge{display:inline-block;border-radius:99px;padding:3px 7px;font-size:11px;background:#eef2f3}.badge.on{background:#e7f6ed;color:#167046}
@media(max-width:760px){.chat-layout{grid-template-columns:1fr}.voice-panel{position:fixed;inset:0 0 0 15%;background:#fff;z-index:15;box-shadow:-10px 0 30px rgba(0,0,0,.15)}.voice-panel.mobile-hidden{display:none}.chat-header{height:62px;padding:0 14px}.messages{padding:14px}.message{max-width:88%}.composer{padding:9px}.send{padding:0 12px}.admin-grid{grid-template-columns:1fr}.admin-shell{margin-top:20px}.card{padding:24px}}