:root{--app-bg:#eef2f7;--sidebar:#fff;--panel:#fff;--panel-2:#f8fafc;--line:#e7ebf1;--text:#1b2434;--muted:#8190a7;--brand:#2a8cf4;--brand-2:#635ce6;--self:#2f8df4;--bubble:#fff;--shadow:0 12px 35px rgba(28,43,68,.06)}
[data-theme=dark]{--app-bg:#0a101a;--sidebar:#111a28;--panel:#101927;--panel-2:#0d1522;--line:#223149;--text:#eef3f8;--muted:#8da0ba;--bubble:#172235;--shadow:0 18px 45px rgba(0,0,0,.20)}
*{box-sizing:border-box}html,body{height:100%;margin:0;font-family:Inter,"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--app-bg)}button,input,textarea{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}.is-hidden{display:none!important}
.app-shell{height:100dvh;display:grid;grid-template-rows:64px;background:var(--app-bg)}.app-topbar{display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid var(--line);background:var(--panel);position:relative;z-index:20}.topbar-left,.topbar-right,.app-brand,.id-chip{display:flex;align-items:center}.topbar-left{gap:12px}.app-brand{gap:10px}.brand-mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 8px 20px rgba(64,118,231,.18);overflow:hidden}.brand-mark img{width:100%;height:100%;object-fit:cover}.brand-name{font-weight:900;letter-spacing:-.02em}.topbar-divider{height:22px;width:1px;background:var(--line)}.topbar-section{font-size:12px;color:var(--muted);font-weight:800}.topbar-right{gap:7px}.icon-btn{width:38px;height:38px;border:0;border-radius:11px;background:transparent;color:var(--muted);display:grid;place-items:center;font-size:18px}.icon-btn:hover{background:var(--panel-2);color:var(--text)}.mobile-menu{display:none}.id-chip{height:38px;gap:8px;padding:0 10px;border:1px solid var(--line);border-radius:11px;background:var(--panel-2);color:var(--muted);font-size:10px}.id-chip strong{font-family:"SFMono-Regular",Consolas,monospace;color:var(--text);font-size:11px}.id-chip i{font-size:14px}.online-dot{width:7px;height:7px;border-radius:50%;background:#2ec993;box-shadow:0 0 0 4px rgba(46,201,147,.10)}
.messenger{min-height:0;display:grid;grid-template-columns:330px 1fr 245px;overflow:hidden}.chat-sidebar{min-width:0;background:var(--sidebar);border-right:1px solid var(--line);display:flex;flex-direction:column;overflow:hidden}.sidebar-head{display:flex;align-items:center;justify-content:space-between;padding:19px 16px 12px}.sidebar-kicker,.welcome-kicker,.modal-kicker{font-size:9px;letter-spacing:.15em;color:var(--brand);font-weight:900}.sidebar-head h1{margin:4px 0 0;font-size:21px;letter-spacing:-.035em}.sidebar-tools{display:flex;gap:4px}.primary-icon{color:#fff!important;background:linear-gradient(135deg,var(--brand),var(--brand-2))!important;box-shadow:0 8px 18px rgba(58,118,238,.16)}.chat-search{position:relative;margin:0 14px 10px}.chat-search i{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted)}.chat-search input{width:100%;height:40px;border:1px solid var(--line);border-radius:11px;background:var(--panel-2);color:var(--text);padding:0 12px 0 34px;outline:0}.quick-launch{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:0 14px 11px}.quick-launch button{border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:10px;text-align:left;display:flex;gap:8px;align-items:center;color:var(--text)}.quick-launch button:hover{border-color:rgba(42,140,244,.35);box-shadow:0 7px 18px rgba(36,91,160,.05)}.quick-icon{width:30px;height:30px;border-radius:9px;background:rgba(42,140,244,.10);color:var(--brand);display:grid;place-items:center}.quick-icon--violet{color:var(--brand-2);background:rgba(99,92,230,.11)}.quick-launch strong{display:block;font-size:10px}.quick-launch small{display:block;color:var(--muted);font-size:8px;margin-top:2px}.conv-list{flex:1;overflow:auto;padding:4px 8px 8px}.empty-list{height:160px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:8px;color:var(--muted);font-size:10px}.spinner{width:20px;height:20px;border:2px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.conv-item{width:100%;border:0;background:transparent;color:var(--text);display:flex;gap:10px;align-items:center;text-align:left;padding:10px 9px;border-radius:12px}.conv-item:hover{background:var(--panel-2)}.conv-item.is-active{background:linear-gradient(90deg,rgba(42,140,244,.10),rgba(99,92,230,.06));box-shadow:inset 2px 0 0 var(--brand)}.conv-avatar{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:grid;place-items:center;flex:none;box-shadow:0 7px 15px rgba(47,141,244,.12)}.conv-main{min-width:0;flex:1}.conv-line{display:flex;justify-content:space-between;gap:8px}.conv-name{font-size:11px;font-weight:900;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-time{font-size:8px;color:var(--muted);flex:none}.conv-preview{font-size:9px;color:var(--muted);display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:4px}.conv-right{min-width:20px;display:flex;justify-content:flex-end}.unread{min-width:18px;height:18px;padding:0 5px;border-radius:999px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:8px;font-weight:900}.sidebar-bottom{padding:11px 16px;border-top:1px solid var(--line);display:flex;gap:7px;color:var(--muted);font-size:9px}
.chat-stage{min-width:0;background:var(--app-bg);position:relative;overflow:hidden}.welcome-view{height:100%;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:30px}.welcome-mark{width:58px;height:58px;border-radius:18px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;color:#fff;font-size:27px;box-shadow:0 16px 30px rgba(64,114,221,.19)}.welcome-view h2{font-size:34px;letter-spacing:-.05em;margin:17px 0 7px}.welcome-view>p{max-width:470px;text-align:center;color:var(--muted);font-size:12px;line-height:1.8;margin:0}.welcome-actions{width:min(520px,100%);display:grid;grid-template-columns:1fr 1fr;gap:11px;margin-top:23px}.welcome-card{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:15px;padding:14px;text-align:left;display:grid;grid-template-columns:38px 1fr 16px;gap:10px;align-items:center;box-shadow:var(--shadow)}.welcome-card:hover{transform:translateY(-1px);border-color:rgba(42,140,244,.32)}.welcome-card>span{width:38px;height:38px;border-radius:11px;background:rgba(99,92,230,.10);color:var(--brand-2);display:grid;place-items:center;font-size:18px}.welcome-card--blue>span{background:rgba(42,140,244,.10);color:var(--brand)}.welcome-card strong,.welcome-card small{display:block}.welcome-card strong{font-size:11px}.welcome-card small{font-size:9px;color:var(--muted);margin-top:3px}.welcome-card>i{color:var(--muted)}.welcome-id{margin-top:16px;display:flex;align-items:center;gap:7px;color:var(--muted);font-size:9px}.welcome-id button{border:0;background:transparent;font-family:"SFMono-Regular",Consolas,monospace;color:var(--text);font-size:10px}.chat-view{height:100%;display:grid;grid-template-rows:60px 1fr auto}.chat-header{height:60px;background:var(--panel);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;padding:0 16px;position:relative;z-index:4}.chat-back{display:none}.chat-avatar{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:grid;place-items:center}.chat-header-main{min-width:0;flex:1}.chat-header-main strong{display:block;font-size:12px}.chat-header-main span{display:block;font-size:9px;color:var(--muted);margin-top:2px}.chat-header-actions{display:flex;gap:3px}.typing-line{padding:5px 18px;background:var(--panel);color:var(--brand);font-size:9px;border-bottom:1px solid var(--line)}.messages{overflow:auto;padding:22px 7%;display:flex;flex-direction:column;gap:7px}.chat-empty{height:100%;display:grid;place-items:center;color:var(--muted);font-size:11px;text-align:center}.msg-row{display:flex;align-items:flex-end;gap:6px}.msg-row--self{justify-content:flex-end}.msg-bubble{max-width:min(650px,80%);padding:9px 11px;border-radius:14px 14px 14px 5px;background:var(--bubble);border:1px solid var(--line);box-shadow:0 3px 12px rgba(20,40,70,.03)}.msg-row--self .msg-bubble{border:0;color:#fff;background:linear-gradient(135deg,var(--self),#4a7bf1);border-radius:14px 14px 5px 14px;box-shadow:0 8px 20px rgba(42,122,231,.14)}.msg-sender{font-size:8px;color:var(--brand);margin:0 0 3px 8px}.msg-content{font-size:12px;line-height:1.62;white-space:pre-wrap;word-break:break-word}.msg-meta{margin-top:5px;font-size:8px;opacity:.65;text-align:right}.msg-image{display:block;max-width:min(330px,66vw);max-height:420px;border-radius:10px;object-fit:cover;cursor:zoom-in}.recall-btn{border:0;background:transparent;color:inherit;opacity:.6;font-size:8px;padding:0;margin-left:4px}.composer-wrap{padding:10px 18px 12px;background:linear-gradient(180deg,transparent,var(--app-bg) 18%)}.composer{display:flex;align-items:flex-end;gap:8px;max-width:900px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:7px;box-shadow:0 13px 30px rgba(24,46,79,.07)}.composer textarea{flex:1;border:0;outline:0;resize:none;background:transparent;color:var(--text);padding:7px 4px;line-height:1.5;max-height:140px}.composer-icon{flex:none}.send-btn{width:38px;height:38px;border:0;border-radius:11px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:grid;place-items:center;font-size:16px;flex:none}.send-btn:disabled{opacity:.4;cursor:not-allowed}.composer-hint{max-width:900px;margin:5px auto 0;display:flex;justify-content:space-between;color:var(--muted);font-size:8px}
.info-sidebar{padding:14px;background:var(--sidebar);border-left:1px solid var(--line);overflow:auto}.info-card{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:14px;margin-bottom:10px;box-shadow:var(--shadow)}.info-card-head{display:flex;justify-content:space-between;color:var(--muted);font-size:9px;margin-bottom:9px}.info-card-head i{font-size:14px}.info-card strong{display:block;font-size:17px;letter-spacing:-.02em}.info-card p{font-size:9px;color:var(--muted);line-height:1.6;margin:6px 0 11px}.btn-soft{min-height:34px;border:1px solid var(--line);background:var(--panel-2);color:var(--text);border-radius:10px;padding:0 11px;display:inline-flex;align-items:center;justify-content:center;gap:6px;font-weight:800;font-size:10px}.info-card--notice{display:flex;gap:10px;background:linear-gradient(180deg,rgba(42,140,244,.06),var(--panel))}.info-card--notice>i{font-size:18px;color:var(--brand)}.info-card--notice strong{font-size:10px}.info-card--notice p{margin:3px 0 0}
.btn{min-height:38px;border-radius:10px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid transparent;font-size:10px;font-weight:900}.btn-primary{color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 8px 18px rgba(47,141,244,.16)}
.modal-overlay{position:fixed;inset:0;background:rgba(15,23,42,.46);backdrop-filter:blur(7px);display:grid;place-items:center;padding:18px;z-index:80}.modal-overlay[hidden]{display:none}.modal-card{width:min(440px,100%);border:1px solid var(--line);border-radius:20px;background:var(--panel);box-shadow:0 30px 90px rgba(9,20,38,.24);overflow:hidden}.modal-head{padding:18px;display:flex;justify-content:space-between;align-items:flex-start}.modal-head h2{margin:6px 0 0;font-size:20px;letter-spacing:-.03em}.modal-body{padding:0 18px 18px}.modal-body label{display:block;color:var(--muted);font-size:10px;font-weight:900;margin-bottom:12px}.modal-body label span{font-weight:400;color:var(--muted)}.modal-input{display:block;width:100%;height:43px;border:1px solid var(--line);border-radius:11px;background:var(--panel-2);color:var(--text);padding:0 12px;margin-top:7px;outline:0}.modal-input:focus{border-color:rgba(42,140,244,.46);box-shadow:0 0 0 3px rgba(42,140,244,.08)}.modal-body p{font-size:9px;color:var(--muted);line-height:1.6}.modal-foot{padding:14px 18px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:8px}.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#111827;color:#fff;border-radius:10px;padding:9px 12px;font-size:10px;box-shadow:0 12px 30px rgba(0,0,0,.18);z-index:100}.toast[hidden]{display:none}
@media(max-width:1150px){.messenger{grid-template-columns:310px 1fr}.info-sidebar{display:none}}
@media(max-width:820px){.app-shell{grid-template-rows:58px}.app-topbar{padding:0 10px}.mobile-menu{display:grid}.topbar-divider,.topbar-section{display:none}.brand-name{font-size:12px}.id-chip span:nth-child(2),.id-chip i{display:none}.id-chip{padding:0 8px}.messenger{grid-template-columns:1fr}.chat-sidebar{position:absolute;left:0;top:58px;bottom:0;width:min(88vw,340px);z-index:30;transform:translateX(-105%);transition:transform .22s ease;box-shadow:16px 0 40px rgba(21,36,60,.15)}.chat-sidebar.is-open{transform:translateX(0)}.chat-stage{grid-column:1}.chat-back{display:grid}.welcome-actions{grid-template-columns:1fr}.welcome-view{padding:24px}.welcome-view h2{font-size:28px}.messages{padding:18px 15px}.msg-bubble{max-width:86%}.chat-header{padding:0 10px}.chat-header-actions{display:none}.composer-wrap{padding:8px 8px 10px}.composer-hint{padding:0 4px}.quick-launch{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.quick-launch{grid-template-columns:1fr}.welcome-view>p{font-size:11px}.welcome-mark{width:52px;height:52px}.welcome-view h2{font-size:24px}}