:root{font-family:"Microsoft YaHei UI","PingFang SC",system-ui,sans-serif;color:var(--text);background:var(--background);font-synthesis:none;--green:var(--accent)}
*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button,a,input,textarea{outline-offset:4px}button{cursor:pointer}a{color:var(--green);text-decoration:none}button{border:1px solid var(--border);border-radius:9px;background:var(--surface);padding:9px 15px;color:inherit}button:hover{background:var(--background)}button:disabled{opacity:.5;cursor:default}[hidden]{display:none!important}h1,h2,h3,p{margin-top:0}.muted{color:var(--muted)}.small{font-size:12px}.brand{display:flex;align-items:center;gap:18px;font-size:24px;font-weight:750;letter-spacing:0;color:var(--green)}.brand span{font-size:12px;font-weight:400;letter-spacing:0}.primary{background:var(--green);color:var(--surface);border-color:var(--green);padding:12px 25px}.primary:hover{background:var(--text)}.full{width:100%}.quiet{background:transparent;border-color:transparent;padding:8px}.error{color:var(--danger);font-size:13px;min-height:20px;white-space:pre-wrap}input{width:100%;border:1px solid var(--border);padding:12px;border-radius:8px;background:var(--soft);color:inherit}label{display:block;font-size:13px;margin-bottom:15px}label input{margin-top:7px}textarea{resize:none;border:none;color:inherit}.auth-layout{min-height:100dvh;display:grid;grid-template-columns:1.15fr 1fr;max-width:1480px;margin:auto;padding:40px;gap:7vw}.welcome{display:flex;flex-direction:column;justify-content:space-between;padding:10px 3vw;background:radial-gradient(ellipse at 30% 50%,var(--hover) 0,transparent 65%)}.welcome-copy{padding:70px 0}.eyebrow{font-size:13px;letter-spacing:0;color:var(--green);margin-bottom:24px}h1{font-size:56px;font-weight:600;line-height:1.3;letter-spacing:0}.welcome-copy p{max-width:400px;color:var(--muted);line-height:2}.feature-tags{display:flex;gap:12px;margin-top:30px}.feature-tags span{font-size:12px;border:1px solid var(--selected);border-radius:20px;padding:7px 13px;color:var(--text)}.welcome-foot{color:var(--muted);font-size:12px}.auth-card{max-width:450px;width:100%;align-self:center;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:32px;box-shadow:0 18px 60px color-mix(in srgb,var(--text) 6%,transparent)}.auth-card h2{font-size:26px;margin-bottom:8px}.auth-card>p{font-size:13px;line-height:1.7}.tabs{display:flex;gap:15px;border-bottom:1px solid var(--border);margin:24px 0}.tabs button{border:none;border-radius:0;color:var(--muted);padding:12px 2px}.tabs .active{border-bottom:2px solid var(--green);color:var(--green)}.auth-links{display:flex;justify-content:space-between;font-size:12px;margin-top:25px}#workspace{display:flex;height:100dvh;overflow:hidden}#sidebar{width:300px;flex-shrink:0;border-right:1px solid var(--border);background:var(--soft);display:flex;flex-direction:column}.side-head{display:flex;justify-content:space-between;align-items:center;padding:25px 22px}.side-head .brand{font-size:21px}.identity{display:flex;flex-direction:column;gap:6px;margin:0 22px 22px}.search{width:calc(100% - 40px);margin:0 20px;background:var(--background);border:none}.section-caption{font-size:11px;color:var(--muted);margin:25px 23px 10px;letter-spacing:0}#contacts{overflow:auto;flex:1}.contact{width:100%;display:flex;align-items:center;gap:12px;text-align:left;border:none;border-radius:0;padding:15px 22px;background:transparent}.contact.selected{background:var(--hover)}.avatar{display:grid;place-items:center;width:42px;height:42px;flex-shrink:0;border-radius:13px;color:var(--accent);background:var(--hover);font-size:16px}.contact-info{flex:1;min-width:0}.contact-info strong{display:block;font-size:14px;font-weight:550;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.contact-info small{color:var(--muted);font-size:11px}.badge{border-radius:12px;background:var(--danger);color:var(--surface);font-size:11px;padding:2px 7px}.side-foot{padding:16px 22px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted)}#conversation{flex:1;min-width:0;display:flex;flex-direction:column;background:var(--soft)}.chat-head{height:86px;flex-shrink:0;padding:20px 32px;background:var(--surface);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.chat-head h2{font-size:18px;margin:0 0 5px;font-weight:600}#back{display:none}#messages{flex:1;overflow-y:auto;padding:24px 32px;scroll-behavior:smooth}.empty{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--muted);padding:25px}.empty-icon{border:1px solid var(--hover);color:var(--muted);border-radius:26px;font-size:32px;padding:20px 28px;margin-bottom:22px;background:var(--background)}.empty h3{font-weight:500;font-size:18px}.empty p{font-size:13px}.message{margin:0 0 20px;display:flex;flex-direction:column;align-items:flex-start}.message.mine{align-items:flex-end}.message-meta{color:var(--muted);font-size:11px;margin-bottom:7px}.bubble{max-width:80%;padding:12px 16px;border:1px solid var(--border);border-radius:3px 12px 12px;background:var(--surface);color:var(--text);white-space:pre-wrap;word-break:break-word;line-height:1.65;font-size:14px}.mine .bubble{background:var(--hover);border-color:var(--hover);border-radius:12px 3px 12px 12px}.file-card{display:flex;flex-direction:column;gap:8px;min-width:160px}.file-card button{font-size:12px;text-align:left}#composer{border-top:1px solid var(--border);background:var(--surface);flex-shrink:0}.composer-toolbar{display:flex;align-items:center}.file-button{cursor:pointer;font-size:13px;margin:0;color:var(--green)}#message-text{width:100%;outline:none}.composer-bottom{display:flex;align-items:center}#transfer{padding:10px 25px;display:flex;gap:12px;align-items:center;background:var(--background);font-size:12px}#transfer-label{max-width:50%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}progress{accent-color:var(--green);width:120px}#toast{position:fixed;top:18px;left:50%;transform:translateX(-50%);background:var(--text);color:var(--surface);padding:12px 22px;border-radius:10px;z-index:100;max-width:90vw;font-size:13px;box-shadow:0 5px 20px color-mix(in srgb,var(--text) 13%,transparent)}.history-note{text-align:center;font-size:12px;color:var(--muted);padding:10px}.admin-page{max-width:1150px;margin:0 auto;padding:30px 25px}.admin-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.admin-head h1{font-size:28px;margin:0}.panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:24px;margin-bottom:22px}.panel h2{font-size:18px}.metrics{display:flex;gap:20px;flex-wrap:wrap}.metric{flex:1;background:var(--surface);border:1px solid var(--border);padding:22px;border-radius:12px;margin-bottom:22px;min-width:120px}.metric strong{font-size:27px;display:block;margin-bottom:6px}.metric span{font-size:12px;color:var(--muted)}.admin-tools{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px}.table-scroll{overflow:auto}table{border-collapse:collapse;width:100%;font-size:13px}th,td{text-align:left;border-bottom:1px solid var(--border);padding:14px 12px;white-space:nowrap}th{font-weight:500;color:var(--muted)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.checkbox{display:flex;align-items:center;gap:10px}.checkbox input{width:auto;margin:0}.admin-login{max-width:450px;margin:12vh auto}.dialog{border:1px solid var(--border);border-radius:8px;padding:25px;width:min(480px,90vw);color:inherit}.dialog::backdrop{background:color-mix(in srgb,var(--text) 33%,transparent)}.dialog h2{font-size:20px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px}
@media(max-width:760px){h1{font-size:36px}.auth-layout{display:block;padding:25px 18px}.welcome{padding:0;background:none}.welcome-copy,.welcome-foot,.brand span{display:none}.welcome .brand{margin:5px 0 30px}.auth-card{margin:auto;padding:25px;box-shadow:none}.side-head{padding-top:20px}#sidebar{width:100%;border-right:none}#conversation{display:none}.chat-open #sidebar{display:none}.chat-open #conversation{display:flex}.chat-head{padding:14px;height:76px;gap:8px;justify-content:flex-start}.chat-head h2{font-size:16px}.chat-head #assist{margin-left:auto;font-size:12px}#back{display:block;padding-left:0}#messages{padding:20px 15px}.bubble{max-width:90%}.composer-toolbar .small{display:none}#transfer{padding:9px 12px;gap:4px;flex-wrap:wrap}#transfer-label{max-width:100%}#transfer button{font-size:11px}progress{flex:1}.admin-page{padding:20px 15px}.admin-head h1{font-size:22px}.form-grid{display:block}.panel{padding:18px}}@media(max-width:760px){}
/* 统一电脑与手机的会话视觉；所有导航和工具均连接真实入口。 */
:root{--green:var(--accent);color:var(--text);background:var(--background)}
button{transition:box-shadow .15s}button:hover{background:var(--background)}button:focus-visible,a:focus-visible{outline:2px solid var(--accent)}
.primary{background:var(--accent);border-color:var(--accent);box-shadow:0 4px 12px color-mix(in srgb,var(--text) 9%,transparent)}.primary:hover{background:var(--text)}
#workspace{background:var(--surface)}.app-rail{width:84px;flex:none;background:var(--hover);border-right:0;display:flex;align-items:center;flex-direction:column;padding:25px 10px 18px;gap:15px}
.rail-avatar{width:43px;height:43px;background:var(--selected);border:1px solid color-mix(in srgb,var(--text) 8%,transparent);border-radius:15px;display:grid;place-items:center;color:var(--text);font-size:20px;font-weight:600;margin-bottom:23px}
.rail-button{display:flex;flex-direction:column;align-items:center;gap:7px;width:64px;padding:12px 0;border:0;background:transparent;color:var(--text);font-size:12px;border-radius:13px}.rail-button:hover{background:var(--selected);color:var(--text)}
.rail-button.active{color:var(--surface);background:var(--accent);box-shadow:0 6px 18px color-mix(in srgb,var(--text) 19%,transparent)}.rail-symbol{display:flex;align-items:center;justify-content:center;line-height:28px}
.rail-download{margin-top:auto;display:flex;flex-direction:column;align-items:center;gap:5px;font-size:27px;color:var(--accent)}.rail-download small{font-size:10px}.rail-wordmark{font-size:10px;color:var(--muted);letter-spacing:2px;margin-top:12px}
#sidebar{width:294px;background:var(--surface);border-color:var(--hover)}.side-head{padding:25px 24px 18px;background:var(--background)}.side-head .brand{font-size:21px;color:var(--text)}.side-head #logout{font-size:12px;color:var(--muted)}
.identity{margin:0 24px 18px;gap:4px}.identity strong{font-size:13px;font-weight:500}.identity .muted{font-size:11px}
.search{margin:0 20px;width:calc(100% - 40px);border:1px solid var(--background);background:var(--background);padding:10px 14px;font-size:12px;border-radius:10px}.search:focus{background:var(--surface);border-color:var(--muted);outline:0}
.contact-filters{display:flex;align-items:center;gap:6px;padding:19px 20px 14px}.contact-filters button{border:0;background:transparent;padding:6px 12px;font-size:12px;color:var(--muted)}.contact-filters button.active{background:var(--hover);color:var(--accent);font-weight:600}
#unread-count:not(:empty){margin-left:5px;font-size:10px}.contact{gap:12px;padding:17px 14px;min-height:81px;border:0;border-radius:12px;width:calc(100% - 16px);margin:3px 8px}.contact:hover{background:var(--background)}.contact.selected{background:var(--hover)}
.avatar{width:44px;height:44px;border-radius:15px;background:var(--muted);color:var(--surface);font-weight:550;position:relative;box-shadow:0 2px 5px color-mix(in srgb,var(--text) 4%,transparent)}
.tone-0{background:linear-gradient(135deg,var(--muted),var(--muted))}.tone-1{background:linear-gradient(135deg,var(--danger),var(--border))}.tone-2{background:linear-gradient(135deg,var(--accent),var(--muted))}.tone-3{background:linear-gradient(135deg,var(--border),var(--muted))}.tone-group{background:linear-gradient(135deg,var(--muted),var(--muted))}
.online-dot{position:absolute;right:-1px;bottom:0;width:11px;height:11px;border:2px solid var(--soft);border-radius:50%;background:var(--accent)}.contact-info strong{font-size:14px;font-weight:550;margin-bottom:6px}.contact-info small{display:block;color:var(--muted);overflow:hidden;white-space:nowrap;text-overflow:ellipsis;max-width:175px;font-size:11px}
.badge{background:var(--danger);min-width:19px;text-align:center;padding:2px 6px}.contact-empty{padding:32px 20px;text-align:center;color:var(--muted);font-size:12px}.side-foot{padding:17px 20px;color:var(--muted);font-size:10px}.side-foot #connection:before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:currentColor;margin-right:6px}
#conversation{background:var(--background)}.chat-head{height:88px;padding:20px 30px;background:var(--surface);border-color:var(--hover)}.chat-heading{display:flex;align-items:center;gap:13px;min-width:0}.chat-heading>div{min-width:0}.chat-head h2{font-size:18px;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:40vw}.chat-head .small{font-size:11px}.heading-avatar{width:40px;height:40px;border-radius:13px;background:var(--muted);font-size:16px}
#assist{font-size:12px;color:var(--muted);border:1px solid var(--hover);border-radius:9px;padding:9px 14px}
#messages{padding:22px 30px;scrollbar-width:thin;scrollbar-color:var(--hover) transparent;overflow-anchor:none}.day-divider{text-align:center;font-size:10px;letter-spacing:.4px;color:var(--muted);margin:8px 0 28px}
.message{display:flex;flex-direction:row;align-items:flex-start;gap:12px;margin:0 0 28px}.message.mine{flex-direction:row-reverse;align-items:flex-start}.message-avatar{width:36px;height:36px;border-radius:12px;font-size:14px;margin-top:22px}
.message-content{display:flex;align-items:flex-start;flex-direction:column;max-width:min(74%,640px);min-width:0}.mine .message-content{align-items:flex-end}.message-meta{color:var(--muted);font-size:10px;margin-bottom:8px;line-height:14px}
.bubble{max-width:100%;background:var(--surface);border:1px solid var(--hover);border-radius:4px 14px 14px;padding:12px 17px;font-size:14px;line-height:1.8;color:var(--text);box-shadow:0 2px 4px color-mix(in srgb,var(--text) 1%,transparent);overflow-wrap:anywhere}
.mine .bubble{background:var(--hover);color:var(--text);border-color:transparent;border-radius:14px 4px 14px 14px;box-shadow:none}
.file-card{position:relative;min-width:210px;max-width:310px;gap:5px;padding-right:42px;white-space:normal}.file-card strong{font-weight:550;overflow-wrap:anywhere;font-size:13px}.file-icon{position:absolute;right:0;top:0;font-size:34px;line-height:40px;opacity:.8}.file-card .muted{color:inherit;opacity:.65;font-size:11px}.file-card button{margin-top:10px;border-radius:6px;padding:6px 10px;background:var(--soft);border-color:var(--selected);color:var(--accent)}.mine .file-card button{background:var(--soft);border-color:var(--border);color:var(--accent)}
#composer{position:relative;background:var(--background);border-color:var(--selected)}.composer-toolbar{min-height:28px}.file-button,.emoji-toggle{font-size:12px;color:var(--muted)}.emoji-toggle{padding:2px 0}.composer-toolbar>.small{margin-left:auto;color:var(--muted);font-size:10px}
.composer-label{margin:2px 0 7px;font-size:12px;color:var(--accent)}#message-text{display:block;font-size:14px;line-height:1.7;background:var(--surface);border:1px solid var(--border);border-radius:10px;transition:box-shadow .15s}#message-text:focus{border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--text) 10%,transparent)}#message-text:disabled{background:var(--soft)}#message-text::placeholder{color:var(--muted)}
#emoji-picker{position:absolute;bottom:100%;left:25px;width:min(448px,calc(100vw - 32px));display:block;background:var(--surface);padding:16px;border:1px solid var(--hover);border-radius:14px;box-shadow:0 12px 40px color-mix(in srgb,var(--text) 15%,transparent);z-index:5}
.emoji-heading{display:flex;align-items:center;gap:10px;font-size:14px;margin-bottom:12px}.emoji-heading span{font-size:11px;color:var(--muted)}.emoji-heading button{margin-left:auto;font-size:18px;border:0;min-width:28px;padding:2px 6px}
.emoji-categories{display:flex;gap:3px;border-bottom:1px solid var(--hover);padding-bottom:9px;margin-bottom:10px}.emoji-categories button{flex:1;padding:7px 2px;border:0;border-radius:7px;font-size:12px;color:var(--muted);white-space:nowrap}.emoji-categories button[aria-selected=true]{background:var(--hover);color:var(--accent);font-weight:600}
.emoji-grid{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:3px;min-height:224px;align-content:start}.emoji-grid button{font-family:'Apple Color Emoji','Segoe UI Emoji',sans-serif;font-size:25px;line-height:1.4;height:42px;padding:3px 0;border:0;border-radius:8px;background:transparent}.emoji-grid button:hover{background:var(--hover)}
.emoji-footer{display:flex;align-items:center;justify-content:flex-end;gap:10px;border-top:1px solid var(--hover);padding-top:10px;margin-top:8px;color:var(--muted);font-size:11px}.emoji-footer>span:first-child{margin-right:auto}.emoji-footer button{border:0;padding:5px 7px;font-size:11px}.emoji-footer button:disabled{opacity:.35}
@media(max-width:480px){#emoji-picker{left:12px;width:calc(100vw - 24px);padding:12px}.emoji-categories button{font-size:11px}.emoji-grid{gap:2px;min-height:209px}.emoji-grid button{height:39px;font-size:23px}.emoji-footer{gap:6px}}

.composer-toolbar .tool-action{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-width:44px;min-height:40px;margin:0;padding:2px 6px;border:0;border-radius:8px;color:var(--accent);font-size:11px;line-height:15px;background:transparent}.tool-action svg{display:block;width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}.tool-action .icon-dot{fill:currentColor;stroke:none}.composer-toolbar .tool-action:hover{color:var(--accent);background:var(--background)}.tool-action:focus-within{outline:2px solid var(--accent);outline-offset:2px}
.empty-icon{background:var(--hover);border-color:var(--selected);color:var(--accent);box-shadow:0 12px 35px color-mix(in srgb,var(--text) 4%,transparent);border-radius:24px}.empty{color:var(--muted)}.empty h3{color:var(--text);font-size:19px}.empty p{font-size:12px}
#transfer{background:var(--background);color:var(--accent)}.devices-open{background:var(--background)!important;border:1px solid var(--selected)!important;color:var(--accent)!important;font-size:12px;padding:9px 13px}.devices-dialog{color:var(--text)!important;border-radius:16px!important}
.welcome{background:radial-gradient(ellipse at 30% 50%,var(--hover) 0,transparent 65%)}.welcome-copy p{color:var(--muted)}.feature-tags span{border-color:var(--selected);color:var(--muted)}.welcome-foot{color:var(--muted)}.auth-card{border-radius:20px;box-shadow:0 18px 60px color-mix(in srgb,var(--text) 7%,transparent)}.auth-card input{background:var(--soft)}.auth-card h2{color:var(--text)}.brand{color:var(--accent)}
@media(min-width:1500px){#sidebar{width:330px}#messages{padding-left:46px;padding-right:46px}.chat-head{padding-left:42px}}
.contact{position:relative}.contact-time{position:absolute;right:14px;top:12px;color:var(--muted);font-size:10px}.contact-info strong{max-width:calc(100% - 38px)}
.chat-heading{min-width:0}.chat-head h2{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#conversation-files-open{white-space:nowrap}
@media(max-width:760px){#conversation-files-open{font-size:10px;padding:7px 9px}.chat-head .chat-heading h2{max-width:100%}}
@media(max-width:1000px) and (min-width:761px){#sidebar{width:250px}.app-rail{width:64px}.contact{padding-left:14px;padding-right:14px}.contact-info small{max-width:135px}.composer-toolbar>.small{display:none}}
@media(max-width:760px){.app-rail{display:none}.chat-open .app-rail{display:none}#sidebar{width:100%;background:var(--surface)}.side-head{padding:24px 22px 18px}.side-head .brand{font-size:25px}.identity{margin-bottom:16px}.devices-open{margin-bottom:15px}#contacts{background:var(--surface)}.contact{padding:17px 22px;border-bottom:1px solid var(--soft);min-height:84px}.contact-info small{max-width:65vw}.contact.selected{border-left-color:transparent}.contact-filters{padding-top:17px}.avatar{width:46px;height:46px}.chat-head{height:78px;padding:12px;gap:8px;justify-content:space-between}.heading-avatar{display:none}.chat-heading{flex:1}.chat-head h2{max-width:48vw;font-size:16px}.chat-head .small{font-size:10px;display:block;max-width:50vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#back{font-size:12px;flex:none}#assist{font-size:10px;padding:7px 9px}#messages{padding:18px 12px}.message{gap:8px;margin-bottom:23px}.message-avatar{width:32px;height:32px;border-radius:10px}.message-content{max-width:calc(100% - 54px)}.message-meta{font-size:9px}.bubble{font-size:14px;padding:10px 13px}.day-divider{margin-bottom:22px}.file-card{min-width:170px;max-width:230px}#message-text{font-size:16px}.side-foot{padding:15px 22px}.auth-card{border-radius:16px}#emoji-picker{left:12px}.empty p{line-height:1.8}}

/* 紧凑输入区：上沿拖动、输入区填充剩余空间、发送选项收在分体按钮。 */
#composer-resizer{height:7px;flex:0 0 7px;cursor:ns-resize;touch-action:none;background:var(--rail);position:relative}
#composer-resizer::after{content:"";position:absolute;left:calc(50% - 18px);top:2px;width:36px;height:3px;border-radius:2px;background:var(--border)}
#composer-resizer:hover::after,#composer-resizer:focus-visible::after{background:var(--accent)}
#composer-resizer:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
#messages{min-height:80px}
#composer{height:212px;min-height:176px;display:flex;flex-direction:column;padding:6px 20px 8px}
.composer-toolbar{gap:8px;margin-bottom:4px;flex:0 0 40px}
.composer-toolbar>.small{margin-left:8px}
.composer-label{flex:none;margin:0 0 4px;font-size:11px}
#message-text{flex:1;min-height:50px;height:auto;margin:0 0 6px;padding:8px 12px}
.composer-bottom{flex:0 0 30px;justify-content:flex-end}
.send-controls{display:flex;position:relative;flex:none;height:30px}
.composer-bottom .send-controls>.primary{margin:0;padding:0;border-radius:7px 0 0 7px;height:30px;font-size:12px}
#send{width:62px;min-width:62px}
.composer-bottom #send-options-toggle{width:26px;border-left:1px solid color-mix(in srgb,var(--surface) 40%,transparent);border-radius:0 7px 7px 0;opacity:1}
#send-options{position:absolute;right:0;bottom:36px;z-index:8;width:210px;padding:5px;background:var(--surface);border:1px solid var(--border);border-radius:9px;box-shadow:0 8px 24px color-mix(in srgb,var(--text) 15%,transparent)}
#send-options button{display:block;width:100%;text-align:left;padding:9px 10px;border:0;background:transparent;color:var(--text);font-size:12px}
#send-options button[aria-checked=true]::before{content:"✓ ";color:var(--accent)}
#send-options button:hover,#send-options button:focus-visible{background:var(--hover);outline-color:var(--accent)}
@media(max-width:760px){#composer{height:188px;padding:5px 14px max(8px,env(safe-area-inset-bottom))}#message-text{font-size:16px}.composer-toolbar{gap:8px}.composer-bottom{flex-basis:32px}.composer-bottom .send-controls>.primary,.send-controls{height:32px}#send-options{bottom:38px}}

/* 简约登录：头像、账号、密码与主操作，配色入口收进右上角。 */
.auth-layout{min-height:100dvh;display:grid;grid-template-columns:minmax(0,1fr);place-items:center;padding:24px;gap:0;max-width:none;background:var(--background)}
.auth-card{position:relative;align-self:center;width:360px;max-width:100%;padding:48px 32px 24px;border:1px solid var(--border);border-radius:16px;background:linear-gradient(155deg,var(--rail),var(--background));box-shadow:0 12px 40px color-mix(in srgb,var(--text) 6%,transparent)}
.auth-avatar{width:80px;height:80px;display:grid;place-items:center;border:2px solid var(--surface);border-radius:50%;background:var(--accent);color:var(--surface);font-size:36px;font-weight:600;margin:0 auto 12px}
.auth-card h2{text-align:center;font-size:16px;font-weight:600;margin:0 0 4px}.auth-card #auth-subtitle{text-align:center;font-size:11px;margin:0 0 22px}
.auth-card #auth-form>label{display:grid;grid-template-columns:44px minmax(0,1fr);align-items:center;gap:8px;font-size:14px;margin:0 0 12px}.auth-card #auth-form>label input{margin:0;text-align:center;font-size:16px;height:44px;background:var(--surface);border-radius:9px}.auth-card input::placeholder{color:var(--muted);font-size:13px}
.auth-card .auth-remember{display:flex;justify-content:flex-end;align-items:center;gap:6px;font-size:12px;height:24px;margin:0}.auth-card .auth-remember input{height:15px;width:15px;accent-color:var(--accent)}
.auth-card .error{min-height:24px;margin:4px 0 8px;font-size:12px;line-height:1.6}.auth-card #auth-submit{height:42px;padding:0;border-radius:9px;font-size:14px}
.auth-switch{text-align:center;margin-top:24px}.auth-switch button{font-size:12px;border:0;background:transparent;padding:4px 10px;color:var(--accent)}.auth-links{display:flex;flex-direction:column;align-items:center;gap:10px;margin-top:14px;font-size:10px}.auth-links span{color:var(--muted)}
.auth-settings{position:absolute;right:14px;top:12px;z-index:2}.auth-settings summary{display:flex;align-items:center;justify-content:center;list-style:none;cursor:pointer;width:30px;height:28px;color:var(--muted);border-radius:6px}.auth-settings summary::-webkit-details-marker{display:none}.auth-settings summary:hover{background:var(--hover)}.auth-settings .theme-control{position:absolute;right:0;top:30px;padding:12px;display:block;width:184px;border:1px solid var(--border);border-radius:9px;background:var(--surface);font-size:12px;box-shadow:0 8px 24px color-mix(in srgb,var(--text) 10%,transparent)}.auth-settings select{margin-top:8px;max-width:160px!important}
.registering .auth-card{width:400px;padding-top:36px}.registering .auth-avatar{width:54px;height:54px;font-size:26px}.registering #auth-form label{font-size:12px}.registering #auth-form>label{display:block}.registering #auth-form input{text-align:left!important;font-size:14px!important;margin-top:6px!important}.registering #auth-form label{margin-bottom:12px}
@media(max-width:480px){.auth-layout{padding:16px;min-height:100dvh}.auth-card{padding-left:26px;padding-right:26px}.registering .auth-card{padding-top:32px}}

.auth-password-options{display:flex;align-items:center;justify-content:space-between;min-height:24px}.auth-password-options>button{padding:0;border:0;border-radius:4px;background:transparent;font-size:12px;color:var(--accent)}.auth-card .auth-remember{margin:0!important}
.recovery-dialog{max-width:400px}.recovery-dialog p{line-height:1.8}.recovery-dialog #recovery-message{min-height:48px}.recovery-dialog .dialog-actions{flex-wrap:wrap}.recovery-dialog .dialog-actions button{font-size:12px;padding:9px 13px}

/* 聊天层次：中性导航与列表、浅灰消息画布、白色编辑区；强调色沿用所选皮肤。 */
#workspace{background:var(--chat-canvas)}
#workspace .app-rail{width:64px;padding:20px 8px 16px;gap:12px;background:var(--chat-rail)}
#workspace .rail-avatar{width:36px;height:36px;border-radius:50%;margin-bottom:12px;box-shadow:none}
#workspace .rail-button{width:48px;min-height:58px;padding:8px 0;gap:5px;border-radius:9px;font-size:11px}
#workspace .rail-symbol svg{width:20px;height:20px}
#workspace .rail-button.active{background:var(--chat-selection);color:var(--accent);box-shadow:none}
#workspace .rail-button:hover{background:var(--chat-selection)}
#workspace #sidebar{width:260px;background:var(--chat-sidebar);border-right:1px solid var(--chat-divider)}
#workspace .side-head{padding:18px 18px 14px;background:var(--chat-sidebar)}
#workspace .side-head .brand{font-size:18px}
#workspace .identity{margin:0 18px 14px}
#workspace .search{margin:0 16px;width:calc(100% - 32px);padding:8px 12px;border:1px solid transparent;border-radius:8px;background:var(--chat-rail)}
#workspace .search:focus{border-color:var(--accent);background:var(--surface)}
#workspace .contact-filters{padding:12px 16px 10px;gap:4px}
#workspace #contacts{background:var(--chat-sidebar)}
#workspace .contact{min-height:72px;padding:12px 10px;gap:12px;margin:3px 6px;width:calc(100% - 12px);border-radius:8px}
#workspace .contact.selected,#workspace .contact:hover{background:var(--chat-selection);border-left-color:transparent}
#workspace .contact .avatar{width:40px;height:40px;border-radius:50%;box-shadow:none}
#workspace .contact-info strong{margin-bottom:5px;font-weight:500}
#workspace .contact-info small{max-width:150px}
#workspace #conversation{background:var(--chat-canvas)}
#workspace .chat-head{height:68px;padding:12px 24px;background:var(--surface);border-bottom:1px solid var(--chat-divider)}
#workspace .chat-head h2{font-size:18px;font-weight:600}
#workspace #assist{border:0;background:transparent;padding:8px 10px;color:var(--text)}
#workspace #messages{background:var(--chat-canvas);padding:24px}
#workspace .bubble{border:1px solid transparent;box-shadow:none;border-radius:10px;background:var(--surface)}
#workspace .mine .bubble{background:var(--bubble)}
#workspace .message-avatar{border-radius:50%;box-shadow:none}
#workspace #composer-resizer{height:5px;flex-basis:5px;background:var(--chat-canvas)}
#workspace #composer-resizer::after{height:1px;top:2px;background:var(--chat-divider)}
#workspace #composer-resizer:hover::after{background:var(--accent)}
#workspace #composer{padding:4px 18px 8px;background:var(--surface);border-top:1px solid var(--chat-divider)}
#workspace .composer-toolbar{flex-basis:34px;gap:4px;margin-bottom:4px}
#workspace .composer-toolbar .tool-action{flex-direction:row;gap:7px;min-width:72px;min-height:30px;padding:4px 8px;color:var(--text);font-size:12px}
#workspace .composer-toolbar .tool-action svg{width:17px;height:17px}
#workspace .composer-toolbar .tool-action:hover{background:var(--chat-rail);color:var(--accent)}
#workspace .composer-label{color:var(--muted);margin-bottom:5px}
#workspace #message-text{border-radius:8px;background:var(--surface);box-shadow:none}
#workspace #message-text:focus{box-shadow:0 0 0 1px var(--accent)}
#workspace .composer-bottom .primary{box-shadow:none}
@media(max-width:760px){
  #workspace .app-rail{display:none}
  #workspace #sidebar{width:100%;border-right:0}
  #workspace .chat-head{height:68px;padding:10px 12px}
  #workspace #messages{padding:18px 12px}
  #workspace .contact-info small{max-width:62vw}
  #workspace #composer{padding:4px 12px max(8px,env(safe-area-inset-bottom))}
  #workspace .composer-toolbar .tool-action{min-width:64px;padding:4px 6px}
}

.account-dialog{width:min(760px,calc(100vw - 36px));max-height:90vh;overflow:auto}
.account-info,.account-columns form{border:1px solid var(--border,#dbe2ed);border-radius:12px;padding:16px;background:var(--surface,#f7f9fd)}
.account-info{margin:12px 0}.account-info p{white-space:pre-wrap;overflow-wrap:anywhere}
.account-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}.account-columns h3{margin-top:0}
.account-columns label{display:grid;gap:7px;margin:12px 0}.account-columns input{width:100%;box-sizing:border-box}
@media(max-width:620px){.account-columns{grid-template-columns:1fr}}

#rail{border-right:1px solid var(--chat-divider)}
.history-empty{font-size:13px;color:var(--muted)}

/* 版本发布表单沿用后台主题，给说明和策略完整的输入区域。 */
#client-update-form textarea,#client-update-form select{display:block;width:100%;margin-top:7px;border:1px solid var(--border);border-radius:8px;padding:12px;background:var(--soft);color:inherit;font:inherit}
#client-update-form textarea{min-height:120px;resize:vertical;line-height:1.7}
#update-package-state{overflow-wrap:anywhere}