:root{--bg:#f4f6f5;--surface:#fff;--ink:#16201d;--muted:#63706b;--line:#dce3e0;--brand:#176b52;--brand-dark:#104c3b;--danger:#c73535;--danger-bg:#fff3f2;--success:#16845e;--shadow:0 16px 48px rgba(18,42,34,.09);--r:8px;font-family:"Microsoft YaHei UI","PingFang SC",system-ui,sans-serif;color:var(--ink);letter-spacing:0}*{box-sizing:border-box}body{margin:0;background:var(--bg);min-width:320px}button,input,textarea{font:inherit;letter-spacing:0}button{cursor:pointer;touch-action:manipulation}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(23,107,82,.25);outline-offset:2px}[hidden]{display:none!important}.brand-lockup{display:flex;align-items:center;gap:12px;color:#fff}.brand-lockup.dark{color:var(--ink)}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:8px;background:var(--brand);color:#fff;font-weight:800}.eyebrow{margin:0 0 16px;color:#58a68b;font-size:13px;font-weight:800}.auth-layout{display:grid;grid-template-columns:minmax(420px,1.05fr) minmax(480px,.95fr);min-height:100dvh}.auth-brand{display:flex;flex-direction:column;padding:44px clamp(40px,7vw,112px);background:#13251f;color:#fff}.auth-message{margin:auto 0;max-width:620px}.auth-message h1{margin:0 0 24px;font-size:clamp(42px,5vw,72px);line-height:1.13;font-weight:650}.auth-message>p:last-child{max-width:500px;color:#b8c8c2;font-size:18px;line-height:1.8}.service-status{display:flex;align-items:center;gap:10px;color:#c6d4cf}.service-status span,.chat-header i{width:8px;height:8px;border-radius:50%;background:#3dcc95;box-shadow:0 0 0 5px rgba(61,204,149,.12)}.auth-panel{display:grid;place-items:center;padding:40px}.auth-box{width:min(420px,100%)}.mobile-brand{display:none}.auth-tabs{display:flex;border-bottom:1px solid var(--line);margin-bottom:40px}.auth-tabs button{position:relative;flex:1;border:0;background:none;padding:15px;color:var(--muted);font-weight:700}.auth-tabs button.active{color:var(--ink)}.auth-tabs button.active:after{content:"";position:absolute;inset:auto 20% -1px;height:3px;background:var(--brand)}.auth-heading h2{font-size:32px;margin:0 0 8px}.auth-heading p{color:var(--muted);margin:0 0 32px}.auth-box label,.profile-form label{display:block;margin:18px 0 8px;font-size:14px;font-weight:700}.auth-box input,.profile-form input,.profile-form textarea{width:100%;min-height:52px;border:1px solid var(--line);border-radius:var(--r);padding:13px 15px;background:#fff;color:var(--ink)}.profile-form textarea{resize:vertical}.password-field{position:relative}.password-field input{padding-right:64px}.password-field button{position:absolute;right:6px;top:6px;min-width:48px;height:40px;border:0;background:none;color:var(--brand)}.field-hint{margin:8px 0 0;color:var(--muted);font-size:13px}.form-error{margin-top:16px;padding:11px 13px;border-radius:6px;background:var(--danger-bg);color:#9e2525;font-size:14px}.primary-button{width:100%;min-height:52px;margin-top:24px;border:0;border-radius:var(--r);background:var(--brand);color:#fff;font-weight:800}.primary-button:hover{background:var(--brand-dark)}.primary-button:disabled{cursor:wait;opacity:.62}.simple-header{display:flex;align-items:center;justify-content:space-between;height:72px;padding:0 clamp(24px,5vw,72px);background:#fff;border-bottom:1px solid var(--line)}.text-button{min-height:44px;border:0;background:none;color:var(--muted)}.profile-main{display:grid;grid-template-columns:minmax(300px,440px) minmax(380px,520px);justify-content:center;gap:clamp(48px,8vw,120px);padding:clamp(60px,8vw,110px) 32px}.profile-copy h1{font-size:44px;line-height:1.2;margin:0 0 20px}.profile-copy>p{color:var(--muted);line-height:1.8}.profile-steps{display:grid;grid-template-columns:32px 80px 32px;margin-top:48px;align-items:center}.profile-steps span{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800}.profile-steps i{height:2px;background:var(--brand)}.profile-steps b{margin-top:10px;font-size:13px;white-space:nowrap}.profile-steps b:last-child{grid-column:3}.profile-form{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px;box-shadow:var(--shadow)}.profile-form h2{margin:0 0 24px}.chat-app{display:grid;grid-template-columns:280px minmax(0,1fr);height:100dvh;background:#fff}.sidebar{display:flex;flex-direction:column;min-width:0;padding:22px 16px 16px;background:#f0f3f2;border-right:1px solid var(--line)}.sidebar-brand{display:flex;align-items:center;justify-content:space-between;padding:0 8px 20px}.new-chat{display:flex;align-items:center;gap:10px;min-height:48px;border:1px solid #cbd6d2;border-radius:var(--r);padding:0 14px;background:#fff;color:var(--ink);font-weight:700}.new-chat span{font-size:22px;color:var(--brand)}.section-label{margin:28px 10px 10px;color:#78837f;font-size:12px;font-weight:800}.conversation-list{flex:1;min-height:0;overflow:auto}.conversation-item{display:block;width:100%;border:0;border-radius:6px;padding:12px;background:none;text-align:left;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversation-item:hover,.conversation-item.active{background:#e2e8e5}.conversation-item small{display:block;margin-top:5px;color:var(--muted)}.account-card{display:flex;align-items:center;gap:10px;padding:14px 8px 2px;border-top:1px solid var(--line)}.account-card>span{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:#d7e7e1;color:var(--brand-dark);font-weight:800}.account-card div{min-width:0;flex:1}.account-card strong,.account-card small{display:block;overflow:hidden;text-overflow:ellipsis}.account-card small{color:var(--muted);font-size:12px}.account-card button{border:0;background:none;color:var(--muted);min-height:44px}.chat-main{display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;min-width:0;background:#fff}.chat-header{display:flex;align-items:center;justify-content:space-between;height:72px;padding:0 clamp(18px,3vw,40px);border-bottom:1px solid #edf0ef}.chat-header>div>strong,.chat-header>div>span{display:block}.chat-header>div>span{margin-top:5px;color:var(--muted);font-size:12px}.chat-header i{display:inline-block;margin-right:8px;width:6px;height:6px;box-shadow:none}.address-button{max-width:320px;border:0;background:none;text-align:right}.address-button span,.address-button b{display:block}.address-button span{font-size:11px;color:var(--muted)}.address-button b{max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.messages{overflow:auto;padding:36px max(24px,calc((100% - 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.quick-icon{background:#f9dddd;color:var(--danger);font-size:23px}.quick-action strong,.quick-action small{display:block}.quick-action small{margin-top:4px;color:var(--muted)}.quick-action>b{color:var(--brand);font-size:13px}.emergency>b{color:var(--danger)}.message-row{display:flex;gap:12px;margin:22px 0}.message-row.user{justify-content:flex-end}.message-bubble{max-width:min(680px,82%);padding:13px 16px;border-radius:8px;background:#f0f3f2;white-space:pre-wrap;line-height:1.7}.user .message-bubble{background:#176b52;color:#fff}.message-row.failed .message-bubble{background:var(--danger-bg);color:#9e2525}.chat-notice{margin:0 auto 8px;width:min(840px,calc(100% - 32px));padding:10px 14px;border-radius:6px;background:var(--danger-bg);color:#9e2525}.composer-wrap{padding:12px max(24px,calc((100% - 840px)/2)) 18px}.composer{display:flex;align-items:flex-end;gap:10px;border:1px solid #cbd6d2;border-radius:8px;padding:9px 9px 9px 16px;box-shadow:0 6px 24px rgba(18,42,34,.06)}.composer:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,107,82,.1)}.composer textarea{flex:1;max-height:150px;min-height:38px;border:0;outline:0;resize:none;padding:8px 0;line-height:1.5}.composer button{width:44px;height:44px;border:0;border-radius:7px;background:var(--brand);color:#fff;font-size:20px;font-weight:800}.composer button:disabled{opacity:.5}.composer-wrap>p{text-align:center;margin:8px 0 0;color:#7c8783;font-size:12px}.icon-button{width:44px;height:44px;border:0;background:none;font-size:22px}.mobile-only{display:none}.scrim{position:fixed;inset:0;background:rgba(0,0,0,.48);z-index:20}@media(max-width:800px){.auth-layout{grid-template-columns:1fr}.auth-brand{display:none}.auth-panel{padding:24px;min-height:100dvh}.mobile-brand{display:flex;align-items:center;gap:10px;margin-bottom:48px}.profile-main{grid-template-columns:1fr;padding:48px 20px}.profile-copy 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