:root{color-scheme:light;--bg:#f7f8fa;--paper:#fff;--ink:#202735;--muted:#747d8c;--line:#e5e8ee;--blue:#3157d5;--pale:#eef2ff;--red:#b94343;--amber:#8b641e}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button,a{touch-action:manipulation}button{transition:background .15s,color .15s,box-shadow .15s}button:disabled{opacity:.55;cursor:wait}button:active{opacity:.8}a{color:var(--blue)}:focus-visible{outline:3px solid #d49a36;outline-offset:4px}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.page{max-width:1180px;margin:auto;padding:0 40px}.site-header{height:106px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--ink);font-size:23px;font-weight:700;letter-spacing:2px}.brand-icon{display:grid;place-items:center;background:var(--blue);color:#fff;width:43px;height:43px;border-radius:13px;font-size:31px;font-weight:400;line-height:1}.brand small{display:block;color:var(--muted);font-size:8px;letter-spacing:2.2px;font-weight:550;margin-top:-3px}.header-right{display:flex;gap:27px;align-items:center}.connection{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:12px;white-space:nowrap}.connection:before{content:"";width:6px;height:6px;background:currentColor;border-radius:50%}.connection.online{color:#288065}.connection.offline{color:var(--red)}.device{display:flex;align-items:center;gap:10px;padding:8px 13px;border:1px solid var(--line);border-radius:8px;background:#fff}.device label{color:var(--muted);font-size:12px;white-space:nowrap}.device input{background:none;border:0;outline-offset:3px;color:var(--ink);width:112px;min-width:0;font-size:13px}.intro{padding:51px 0 34px;display:flex;justify-content:space-between;align-items:center;gap:30px}.eyebrow{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted);letter-spacing:1.4px;margin:0 0 15px}.eyebrow>span{width:15px;height:2px;background:var(--blue)}h1{font-size:44px;line-height:1.3;letter-spacing:-1.5px;margin:0;font-weight:650}h1 br{display:none}h1 span{color:var(--blue)}.intro-copy{margin:14px 0 0;color:var(--muted);font-size:14px}.mobile-break{display:none}.intro-note{display:flex;align-items:center;gap:30px;padding-top:25px;flex-shrink:0}.intro-note div{display:flex;flex-direction:column;gap:6px}.intro-note b{font-size:23px;line-height:1.25;font-weight:600;letter-spacing:-.5px}.intro-note span,.intro-note p{color:var(--muted);font-size:11px;margin:0}.intro-note .note-line{width:1px;height:40px;background:var(--line)}.public-notice{display:flex;align-items:center;gap:12px;padding:14px 18px;background:#fff9ec;border:1px solid #efdfb9;border-radius:10px;color:var(--amber);margin-bottom:29px}.notice-icon{display:grid;place-items:center;border:1.5px solid #c39a4f;width:19px;height:19px;font-size:12px;border-radius:50%;font-weight:650;flex-shrink:0}.public-notice p{margin:0;font-size:12px}.public-notice strong{font-size:13px;margin-right:13px;font-weight:600}.public-badge{font-size:10px;white-space:nowrap;letter-spacing:1px;margin-left:auto;border:1px solid #ead6aa;border-radius:4px;padding:2px 7px}.workspace{display:grid;grid-template-columns:350px minmax(0,1fr);gap:30px;align-items:start;min-height:440px}.panel{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 5px 18px #222c4310}.compose{position:sticky;top:24px}.section-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:25px}h2{font-size:16px;font-weight:650;letter-spacing:.1px;margin:0}.step-label{color:#a5acb8;font-size:9px;letter-spacing:1.7px}.input-label{display:block;color:var(--muted);font-size:12px;margin-bottom:9px}textarea{display:block;width:100%;background:#f9fafc;border:1px solid var(--line);border-radius:8px;padding:13px;min-height:156px;max-height:400px;resize:vertical;line-height:1.7;color:var(--ink);font-size:14px}textarea::placeholder{color:#a0a7b3}.send-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:13px}.send-toolbar>span{color:#8c94a2;font-size:10px}.primary{display:flex;gap:17px;align-items:center;border:0;background:var(--blue);color:#fff;min-height:43px;padding:10px 16px;border-radius:7px;font-size:13px;white-space:nowrap}.primary:hover{background:#2549bd}.primary>span{font-size:19px;line-height:1}.divider{display:flex;align-items:center;gap:13px;color:#9199a6;font-size:11px;margin:26px 0 19px}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--line)}.file-picker{width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;background:#fafbff;border:1px dashed #c6d1f1;border-radius:9px;padding:21px 10px;color:var(--muted);font-size:12px}.file-picker:hover{background:var(--pale);border-color:var(--blue)}.upload-icon{font-size:25px;color:var(--blue);line-height:1.2;margin-bottom:5px}.file-picker strong{font-size:14px;color:var(--blue);font-weight:600}.file-picker small{font-size:10px;color:#939cac;margin-top:7px}.compose-foot{margin:17px 0 0;color:#929aa7;font-size:10px;display:flex;align-items:center;justify-content:center;gap:5px}.compose-foot>span:first-child{font-size:15px}.feed{min-width:0}.feed-header{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:1px 0 5px;min-height:35px}.feed-title{display:flex;align-items:center;gap:8px}.count{font-size:11px;min-width:21px;text-align:center;padding:1px 5px;background:#e9edf4;color:#6d7789;border-radius:5px}.filters{display:flex;gap:3px}.filters button{border:0;border-radius:5px;color:var(--muted);background:none;min-height:35px;min-width:45px;padding:7px 12px;font-size:12px}.filters button[aria-pressed=true]{background:#e9eefc;color:var(--blue);font-weight:550}.filters button:hover{background:#e9eefc}.feed-caption{margin:0 0 20px;color:#9098a6;font-size:11px}.message{background:#fff;border:1px solid var(--line);border-radius:11px;padding:19px 20px;margin-bottom:13px;min-width:0}.message-meta{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:10px;flex-wrap:wrap;margin-bottom:13px}.kind-tag{display:flex;align-items:center;gap:5px;color:var(--blue);background:var(--pale);border-radius:4px;padding:2px 6px}.message-device{max-width:180px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.message-meta time{margin-left:auto;white-space:nowrap;color:#959dab}.message pre{font-family:inherit;font-size:14px;line-height:1.8;white-space:pre-wrap;overflow-wrap:anywhere;margin:0;max-height:300px;overflow:auto;tab-size:4}.message-bottom{display:flex;gap:12px;align-items:center;justify-content:space-between;margin-top:16px}.expires{font-size:10px;color:#949caa;white-space:nowrap}.actions{display:flex;align-items:center;gap:5px}.actions button,.download{border:0;background:none;padding:8px 11px;min-height:36px;min-width:44px;color:var(--muted);font-size:12px;border-radius:5px;text-decoration:none;white-space:nowrap}.actions button:hover{background:var(--bg)}.actions .copy,.download{color:var(--blue);background:#f1f4ff}.actions .copy:hover,.download:hover{background:#e5ebff}.actions .delete:hover{background:#fff0f0;color:var(--red)}.file-content{display:flex;align-items:center;gap:13px;min-width:0}.file-icon{height:46px;width:42px;background:#f1f3f9;color:#6d7ca6;border-radius:7px;display:grid;place-items:center;flex-shrink:0;font-size:9px;font-weight:700;letter-spacing:.4px}.file-info{min-width:0}.filename{font-size:14px;font-weight:550;overflow-wrap:anywhere;line-height:1.6}.file-size{color:#929aaa;font-size:11px;margin-top:3px}.empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:65px 16px;text-align:center;min-height:330px;border:1px dashed #d8deea;border-radius:11px;color:var(--muted)}.empty-icon{height:56px;width:56px;border-radius:17px;display:grid;place-items:center;background:#eaf0ff;color:#7991db;font-size:33px;margin-bottom:18px}.empty h3{font-size:16px;font-weight:550;color:#687486;margin:0 0 7px}.empty p{font-size:12px;line-height:1.9;margin:0;max-width:270px}.empty small{font-size:10px;margin-top:24px;color:#a0a8b6;letter-spacing:1px}.upload{padding:13px 0 0;margin-top:13px;border-top:1px solid var(--line);font-size:11px}.upload-top{display:flex;align-items:start;gap:10px;justify-content:space-between}.upload-name{overflow-wrap:anywhere;min-width:0}.upload-name strong{display:block;font-weight:500;color:var(--ink)}.upload-status{color:var(--muted)}.upload button{border:0;color:var(--red);background:none;font-size:11px;padding:4px 7px;min-height:32px;white-space:nowrap}.upload progress{width:100%;height:5px;accent-color:var(--blue);display:block;margin-top:8px}.upload.failed .upload-status{color:var(--red)}footer{display:flex;justify-content:space-between;gap:12px;margin-top:49px;border-top:1px solid var(--line);padding:24px 0 29px;color:#9199a6;font-size:10px}.footer-dot{margin:0 8px}#toast{position:fixed;bottom:max(25px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);background:#242e45;color:#fff;padding:12px 19px;border-radius:9px;z-index:30;box-shadow:0 4px 24px #222c4320;font-size:13px;max-width:calc(100vw - 32px);overflow-wrap:anywhere}#drop{position:fixed;inset:14px;border:2px dashed var(--blue);border-radius:20px;z-index:40;background:#f0f4ffed;display:grid;place-items:center;text-align:center;pointer-events:none;color:var(--blue)}#drop div>span{display:block;font-size:56px;line-height:1.4}#drop strong{font-size:26px;font-weight:600}#drop p{font-size:14px;color:#7785a6}.noscript{padding:20px;text-align:center;color:var(--red)}
@media(min-width:1400px){.intro{padding-top:61px;padding-bottom:41px}.workspace{gap:38px;grid-template-columns:360px minmax(0,1fr)}}
@media(max-width:1050px){.page{padding:0 28px}.intro-note{gap:20px}.intro-note>p,.note-line{display:none}h1{font-size:37px}.public-badge{display:none}.public-notice strong{display:block;margin-bottom:2px}.workspace{grid-template-columns:310px minmax(0,1fr);gap:23px}.panel{padding:21px}.send-toolbar>span{font-size:9px}.primary{padding:10px 13px;gap:9px}}
@media(max-width:760px){.page{padding:0 20px}.site-header{height:87px;gap:10px}.brand{font-size:21px;gap:9px}.brand-icon{width:37px;height:37px;font-size:28px;border-radius:11px}.brand small{font-size:7px;letter-spacing:1.5px}.header-right{gap:8px;flex-direction:column-reverse;align-items:flex-end}.device{padding:5px 9px;gap:6px;border-radius:6px}.device input{width:86px;font-size:12px}.device label{font-size:10px}.connection{font-size:10px;gap:5px}.connection:before{width:5px;height:5px}.intro{padding:29px 0 24px;gap:15px;align-items:flex-end}.eyebrow{font-size:10px;letter-spacing:.7px;margin-bottom:12px}h1{font-size:34px;letter-spacing:-1px}h1 br{display:block}.intro-copy{font-size:12px;line-height:1.8;margin-top:12px}.mobile-break{display:block}.intro-note{flex-direction:column;align-items:flex-start;gap:15px;padding:0 0 5px}.intro-note b{font-size:19px}.intro-note span{font-size:9px}.intro-note div{gap:2px}.public-notice{padding:12px;gap:9px;margin-bottom:21px;align-items:flex-start}.notice-icon{width:16px;height:16px;font-size:10px;margin-top:2px}.public-notice p{font-size:11px}.public-notice strong{font-size:12px;margin:0 0 3px}.workspace{grid-template-columns:minmax(0,1fr);gap:28px;min-height:0}.compose{position:static;padding:20px;box-shadow:0 3px 12px #222c4308}.section-title{margin-bottom:18px}textarea{font-size:16px;min-height:130px}.send-toolbar>span{font-size:10px}.primary{padding:10px 16px;gap:17px}.divider{margin:21px 0 15px}.file-picker{padding:16px 10px}.compose-foot{margin-top:13px}.feed-caption{margin-bottom:15px}.filters button{min-height:40px;min-width:44px}.message{padding:17px}.message-device{max-width:140px}.message-meta time{font-size:9px}.empty{min-height:250px;padding:35px 16px}.empty h3{font-size:15px}.empty small{margin-top:17px}.actions button,.download{min-height:44px}.message-bottom{margin-top:12px}.expires{font-size:9px}footer{flex-direction:column;gap:5px;margin-top:31px;padding-bottom:max(25px,env(safe-area-inset-bottom))}}
@media(max-width:360px){.page{padding:0 14px}.intro-note b{font-size:17px}h1{font-size:30px}.message-meta{gap:6px}.message-device{max-width:115px}.message-bottom{gap:5px}.actions button,.download{padding:8px}.send-toolbar>span{font-size:9px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

dialog{width:min(390px,calc(100vw - 40px));padding:25px;border:1px solid var(--line);border-radius:14px;color:var(--ink);box-shadow:0 20px 80px #14203e30}dialog::backdrop{background:#19263e66;backdrop-filter:blur(3px)}dialog h2{font-size:18px}dialog p{font-size:13px;color:var(--muted);margin:11px 0 25px}dialog form{display:flex;justify-content:flex-end;gap:9px}dialog button{min-height:44px;border:0;border-radius:7px;background:var(--bg);color:var(--muted);padding:10px 16px;font-size:13px}dialog .danger{background:var(--red);color:white}dialog .danger:hover{background:#a33131}