:root{font-family:Inter,ui-sans-serif,system-ui,"Microsoft YaHei",sans-serif;color:#14213d;background:#f3f6fa}*{box-sizing:border-box}body{margin:0}header{height:64px;background:#0d2748;color:white;display:flex;align-items:center;justify-content:space-between;padding:0 24px}header b{font-size:24px;margin-right:16px;color:#46b5ff}header span{opacity:.9}main{display:grid;grid-template-columns:320px 1fr;height:calc(100vh - 64px)}aside{background:white;border-right:1px solid #dbe3ec;padding:18px;overflow:auto}section{padding:24px;overflow:auto}.chat{padding:13px;border-radius:12px;margin:6px 0;cursor:pointer}.chat:hover,.chat.active{background:#eaf5ff}.chat small{display:block;color:#667;margin-top:4px}.msg{max-width:760px;background:white;border-radius:14px;padding:14px;margin:10px 0;box-shadow:0 2px 10px #10203010}.msg.out{margin-left:auto;background:#dff3ff}.original{font-size:16px}.translation{border-top:1px solid #edf0f3;margin-top:10px;padding-top:10px;color:#334}.risk{color:#b42318;font-weight:600}.suggest{background:#f5f8fb;padding:10px;border-radius:8px;margin-top:10px;cursor:pointer}.composer{position:sticky;bottom:0;background:#f3f6fa;padding-top:14px}textarea,input{width:100%;padding:12px;border:1px solid #b9c7d5;border-radius:9px;font:inherit}button{background:#087fce;color:white;border:0;border-radius:9px;padding:12px 18px;font-weight:700;cursor:pointer}.warning{font-size:13px;color:#8a4b08;margin:8px 0}

dialog#login{width:min(920px,calc(100vw - 32px));max-width:920px;padding:0;border:0;border-radius:24px;overflow:hidden;background:#fff;box-shadow:0 30px 100px #07172e66}dialog#login::backdrop{background:radial-gradient(circle at 20% 10%,#184a78cc,#07172ef2);backdrop-filter:blur(8px)}.login-shell{display:grid;grid-template-columns:1.05fr .95fr;min-height:540px}.login-brand{position:relative;display:flex;flex-direction:column;padding:46px;color:#fff;overflow:hidden;background:linear-gradient(145deg,#072b4b 0%,#064d77 56%,#047ea5 100%)}.login-brand:before,.login-brand:after{content:"";position:absolute;border-radius:50%;pointer-events:none}.login-brand:before{width:330px;height:330px;right:-165px;top:-115px;border:1px solid #85ddff44;box-shadow:0 0 0 45px #58c7f309,0 0 0 90px #58c7f309}.login-brand:after{width:180px;height:180px;left:-85px;bottom:-75px;background:#1fc4c41c}.brand-mark{position:relative;z-index:1;width:48px;height:48px;display:grid;place-items:center;float:left;margin-right:14px;border:1px solid #8be4ff88;border-radius:14px;background:#ffffff12;color:#60d8ff;font-size:26px;font-weight:900;box-shadow:inset 0 1px #ffffff30}.brand-name{position:absolute;top:47px;left:110px;font-size:25px;font-weight:850;letter-spacing:.08em}.brand-kicker{position:absolute;top:79px;left:110px;color:#a7dced;font-size:9px;letter-spacing:.18em}.brand-copy{position:relative;z-index:1;margin:auto 0}.brand-copy h1{margin:0 0 20px;font-size:36px;line-height:1.28;letter-spacing:-.035em}.brand-copy p{max-width:370px;margin:0;color:#c6e6ef;font-size:15px;line-height:1.8}.brand-points{position:relative;z-index:1;display:flex;gap:16px;color:#dff8ff;font-size:12px}.brand-points span:before{content:"✓";display:inline-grid;place-items:center;width:18px;height:18px;margin-right:6px;border-radius:50%;background:#5de0d033;color:#7ff5df;font-weight:900}.login-form{display:flex;flex-direction:column;justify-content:center;padding:56px 54px;background:linear-gradient(180deg,#fff,#f9fbfd)}.secure-badge{align-self:flex-start;margin-bottom:20px;padding:7px 11px;border:1px solid #d9e9f2;border-radius:999px;background:#f3f9fc;color:#39708c;font-size:12px;font-weight:700}.secure-badge i{display:inline-block;width:7px;height:7px;margin-right:7px;border-radius:50%;background:#22b78b;box-shadow:0 0 0 4px #22b78b18}.login-form h2{margin:0;color:#0c2b46;font-size:30px;letter-spacing:-.03em}.login-subtitle{margin:10px 0 32px;color:#6c7e8d;font-size:14px}.login-form label{margin-bottom:9px;color:#29445b;font-size:13px;font-weight:750}.password-wrap{position:relative}.password-wrap input{height:52px;padding:0 72px 0 15px;border:1px solid #cddbe5;border-radius:12px;background:#fff;color:#102c43;outline:none;transition:.2s}.password-wrap input:focus{border-color:#168ec2;box-shadow:0 0 0 4px #168ec218}.toggle-password{position:absolute;right:6px;top:6px;height:40px;padding:0 11px;background:transparent;color:#4a6a80;font-size:12px;font-weight:700}.login-button{height:52px;margin-top:18px;display:flex;align-items:center;justify-content:center;gap:10px;border-radius:12px;background:linear-gradient(135deg,#087db7,#05a0bd);box-shadow:0 10px 24px #087db72c;transition:transform .18s,box-shadow .18s}.login-button:hover{transform:translateY(-1px);box-shadow:0 14px 28px #087db73a}.login-button:disabled{opacity:.65;cursor:wait;transform:none}.login-button b{font-size:20px;line-height:1}.login-help{margin-top:28px;color:#91a0ac;text-align:center;font-size:11px}#loginError{min-height:20px;margin:12px 0 0;color:#c03535;text-align:center;font-size:13px}

@media(max-width:720px){main{grid-template-columns:1fr}aside{height:34vh;border-right:0;border-bottom:1px solid #ddd}section{height:66vh;padding:14px}header{padding:0 14px}header span{font-size:13px}.msg{max-width:94%}dialog#login{width:calc(100vw - 24px);border-radius:20px}.login-shell{display:block;min-height:0}.login-brand{min-height:190px;padding:26px}.brand-mark{width:42px;height:42px}.brand-name{top:28px;left:82px;font-size:22px}.brand-kicker{top:56px;left:82px;font-size:8px}.brand-copy{margin-top:32px}.brand-copy h1{margin-bottom:8px;font-size:25px}.brand-copy p{font-size:12px;line-height:1.55}.brand-points{display:none}.login-form{padding:30px 26px 28px}.secure-badge{display:none}.login-form h2{font-size:25px}.login-subtitle{margin:7px 0 22px}.login-help{margin-top:20px}}

.top-actions,.aside-title,.conversation-head,.composer-actions,.msg-meta,.msg-tools{display:flex;align-items:center;justify-content:space-between;gap:10px}.icon-btn,.secondary{background:#fff;color:#27516d;border:1px solid #d6e2ea;box-shadow:none}.icon-btn{width:34px;height:34px;padding:0;border-radius:10px;font-size:19px}.healthy{color:#b9f5df}.unhealthy{color:#ffd9a1}.aside-title h2{margin:0}.aside-title small,#chatMeta{color:#708394}.live-dot{width:9px;height:9px;border-radius:50%;background:#22bd8d;box-shadow:0 0 0 5px #22bd8d18}.search{margin:16px 0;padding-left:14px;background:#f7fafc}.chat{width:100%;display:flex;align-items:center;gap:10px;text-align:left;background:transparent;color:#17344a;border:0}.avatar{width:38px;height:38px;flex:0 0 38px;display:grid;place-items:center;border-radius:12px;background:linear-gradient(145deg,#dff4ff,#dff8ee);color:#087ca5;font-weight:850}.chat-body{min-width:0;flex:1}.chat-body b,.chat-body small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-side{display:flex;flex-direction:column;align-items:flex-end;gap:6px}.chat-side time{font-size:10px;color:#8393a0}.chat-side em{min-width:20px;height:20px;display:grid;place-items:center;border-radius:99px;background:#e7f4fb;color:#1684b4;font-size:10px;font-style:normal}.chat-empty{padding:30px 10px;color:#748695;text-align:center;line-height:1.7}.empty-state{max-width:520px;margin:8vh auto;text-align:center}.empty-state .empty-icon{width:66px;height:66px;margin:0 auto 18px;display:grid;place-items:center;border-radius:20px;background:linear-gradient(145deg,#dff4ff,#ddf8ed);color:#087fa9;font-size:28px;font-weight:900}.empty-state p,.empty-state ol{color:#617688;line-height:1.7}.empty-state ol{text-align:left;background:#fff;border-radius:14px;padding:16px 24px 16px 44px}.conversation-head{position:sticky;top:-24px;z-index:3;padding:18px 0;background:#f3f6fa}.conversation-head h2{margin:0 0 4px}.msg{position:relative}.msg-meta{margin-bottom:9px;color:#82909b;font-size:11px}.translation b{display:block;margin-bottom:4px;color:#287291;font-size:11px}.translation.pending{color:#8797a3;font-style:italic}.msg-tools{justify-content:flex-start;margin-top:10px}.msg-tools button{padding:6px 9px;font-size:11px}.suggest{width:100%;border:1px solid #d6e8f1;text-align:left;color:#27485f}.suggest b,.suggest small{display:block;margin-bottom:5px}.suggest small{margin-top:7px;color:#607b8d}.composer{border-top:1px solid #dbe5ec}.composer label,.reply-preview label{display:block;margin-bottom:7px;color:#294a61;font-size:12px;font-weight:750}.composer-actions{margin-top:8px}.composer-actions span{color:#758998;font-size:12px}.reply-preview{margin-top:12px;padding:14px;border:1px solid #cce3ee;border-radius:12px;background:#fff}.translated-reply,.back-translation{padding:11px;border-radius:9px;white-space:pre-wrap;line-height:1.55}.translated-reply{margin-bottom:12px;background:#eaf7fd;color:#153c52}.back-translation{background:#f4f7f9;color:#405665}.reply-preview[hidden],#statusPanel[hidden]{display:none}.status-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:14px}.status-grid span{display:flex;justify-content:space-between;padding:9px;border-radius:8px;background:#fff;color:#667d8e;font-size:12px}.status-grid b{color:#1d526d}.status-note{font-size:11px;color:#8a5c3b}.mobile-only{display:none}button:disabled{opacity:.55;cursor:not-allowed}#toast{position:fixed;z-index:1000;left:50%;bottom:28px;transform:translateX(-50%);padding:11px 18px;border-radius:999px;background:#123d54;color:#fff;box-shadow:0 10px 30px #001b2b40;font-size:13px}#toast.error{background:#9f2f2f}

@media(max-width:720px){header .top-brand span{display:none}main{display:block;height:calc(100vh - 64px)}aside{height:100%;padding:14px}section{display:none;height:100%;padding:12px}.chat-open aside{display:none}.chat-open section{display:block}.mobile-only{display:inline-flex}.conversation-head{top:-12px}.msg{max-width:96%}.composer{padding-bottom:max(14px,env(safe-area-inset-bottom))}.status-grid{grid-template-columns:1fr}.empty-state{margin:4vh auto}.empty-state ol{font-size:13px}}