:root{--ink:#18231e;--muted:#79847d;--line:#e3e8e4;--paper:#fbfcfa;--green:#1f5a45;--soft:#e8f1ec;--coral:#dd6b45}
*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{background:#f3f5f2;color:var(--ink);font-family:"Segoe UI","Microsoft YaHei",sans-serif}button,textarea{font:inherit;color:inherit}
.topbar{position:fixed;z-index:20;inset:0 0 auto;height:66px;display:grid;grid-template-columns:330px 1fr auto;align-items:center;padding:0 24px;background:#fbfcfaf5;border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}.brand>span{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--green);color:white;font:700 18px Georgia}.brand em{padding:3px 7px;border-radius:6px;background:#edf1ee;color:#748078;font:normal 9px sans-serif}
.connection{justify-self:center;display:flex;align-items:center;gap:9px;color:#66716b;font-size:12px}.connection i{width:7px;height:7px;border-radius:50%;background:#e09a45;box-shadow:0 0 0 5px #e09a4515}.connection.online i{background:#3f956e}.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#e7ebe8;font-size:11px;font-weight:700}.menu{display:none;border:0;background:transparent}
.layout{min-height:100vh;padding-top:66px;display:grid;grid-template-columns:340px minmax(520px,1fr) 286px;max-width:1600px;margin:auto;background:white}.sidebar{padding:29px 20px;border-right:1px solid var(--line);background:#f8faf7;overflow:auto}.sidebar-title{display:flex;justify-content:space-between;align-items:end;margin:0 8px 22px}.sidebar-title small,.context>small{color:#7c877f;font-size:9px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}.sidebar-title h1{margin:7px 0 0;font:600 23px Georgia,"Songti SC",serif}.sidebar-title b{display:grid;place-items:center;min-width:28px;height:28px;border-radius:50%;background:#e5eee8;color:var(--green);font-size:11px}
.filters{display:flex;gap:3px;padding:4px;margin-bottom:15px;border-radius:10px;background:#ecefeb}.filters button{flex:1;padding:8px 3px;border:0;border-radius:7px;background:transparent;color:#748078;font-size:10px;cursor:pointer}.filters button.active{background:white;color:var(--ink);font-weight:700;box-shadow:0 1px 5px #243a2b12}
.message-list{display:grid;gap:8px}.message-card{position:relative;display:grid;grid-template-columns:34px 1fr;gap:11px;width:100%;padding:14px;border:1px solid transparent;border-radius:13px;background:transparent;text-align:left;cursor:pointer}.message-card:hover,.message-card.selected{background:white;border-color:#dfe6e1;box-shadow:0 8px 28px #2f49370d}.message-icon{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--soft);color:var(--green);font-weight:800}.type-report{background:#173f32;color:#efd39f;font-family:Georgia}.type-choice{background:#f8e9e3;color:#bc5c3e}.type-web{background:#e8edf6;color:#526a92}.message-content{min-width:0;display:grid}.message-meta{display:flex;justify-content:space-between;gap:8px;color:#7d8781;font-size:9px}.message-content strong{margin:5px 0 4px;font-size:13px;line-height:1.35}.preview{overflow:hidden;color:#7b857f;font-size:10px;white-space:nowrap;text-overflow:ellipsis}.tag-row{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-top:8px}.tag{padding:3px 7px;border-radius:5px;background:#edf1ee;color:#62716a;font-size:9px;font-weight:700}.status-tag{font-size:9px;font-weight:700}.status-waiting_for_user{color:#b64f36}.status-user_done_ai_unseen{color:#9a6b21}.status-ai_seen{color:#5a7668}.star{color:#a8752b;font-size:9px}.unread{position:absolute;top:12px;right:8px;width:6px;height:6px;border-radius:50%;background:var(--coral)}
.detail{min-width:0}.detail-head{height:72px;display:flex;align-items:center;justify-content:space-between;padding:15px 30px;border-bottom:1px solid var(--line)}.sender{display:flex;align-items:center;gap:10px}.sender>span{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--green);color:white;font-size:11px;font-weight:700}.sender>div{display:grid;gap:3px}.sender strong{font-size:12px}.sender small{color:#8a938d;font-size:9px}.message-actions{display:flex;gap:7px}.favorite,.delete-message,.back{padding:7px 10px;border:1px solid #dfe5e1;border-radius:8px;background:white;color:#748078;font-size:10px;cursor:pointer}.favorite.active{color:#986a26;background:#fff9ed;border-color:#ead7b4}.delete-message{color:#ad4f3b}.delete-message:hover{background:#fff4f1;border-color:#e8c6bd}.back{display:none;border:0}
.letter{max-width:760px;margin:auto;padding:48px 48px 64px}.eyebrow{margin:0 0 10px;color:var(--coral);font-size:10px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.letter h2{margin:0 0 16px;font:600 clamp(28px,3vw,39px)/1.15 Georgia,"Songti SC",serif;letter-spacing:-.035em}.lead{margin:0;color:#536058;font:15px/1.8 Georgia,"Songti SC",serif}
.options{display:grid;gap:8px;margin:28px 0}.options button{display:flex;justify-content:space-between;align-items:center;padding:14px;border:1px solid #dfe5e1;border-radius:11px;background:white;text-align:left;cursor:pointer}.options button:hover,.options button.selected{background:#eef6f1;border-color:#6f9d87}.options button.selected{box-shadow:0 0 0 2px #dcece3}.options span{font-size:12px;font-weight:700}.options b{color:#84978d}.options button.selected b{color:var(--green)}
.attachment{margin:28px 0 14px;overflow:hidden;border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 35px #253c2c10}.attachment img,.attachment iframe{display:block;width:100%;height:280px;border:0;object-fit:cover}.attachment figcaption{display:flex;justify-content:space-between;padding:10px 13px;background:white;color:#7c8780;font-size:9px}
.report{margin:28px 0;overflow:hidden;border:1px solid #dde5df;border-radius:14px}.report-head{padding:18px;background:#173f32;color:white}.report-head small{color:#bdd2c7;font-size:9px}.report-head h3{margin:5px 0 0;font:600 18px Georgia}.metrics{display:grid;grid-template-columns:repeat(3,1fr)}.metrics div{padding:16px;text-align:center;border-right:1px solid var(--line)}.metrics div:last-child{border:0}.metrics b{display:block;font:600 19px Georgia}.metrics span{color:#828c86;font-size:9px}
.wait-banner{display:flex;gap:10px;align-items:flex-start;margin:22px 0;padding:12px 14px;border:1px solid #e1e6e2;border-radius:10px;background:#f6f8f6}.wait-banner b{flex:0 0 auto;font-size:10px}.wait-banner span{color:#748078;font-size:10px;line-height:1.5}.wait-banner.wait-blocking{background:#fdf5f2;border-color:#f0d9d1}.note{display:grid;gap:8px;margin-top:25px}.note label{font-size:10px;font-weight:700}.note textarea{min-height:75px;padding:12px;border:1px solid #dfe5e1;border-radius:10px;background:#fbfcfb;resize:vertical}.submit-reply{justify-self:start;min-width:128px;padding:11px 18px;border:0;border-radius:9px;background:var(--green);color:white;font-size:11px;font-weight:700;cursor:pointer;box-shadow:0 8px 22px #1f5a4528}.submit-reply:hover{background:#174c39}.submit-reply:focus-visible{outline:3px solid #9fc7b4;outline-offset:2px}.saved{color:var(--green);font-size:10px}.empty{padding:80px 0;text-align:center;color:#89938c}
.context{padding:30px 23px;border-left:1px solid var(--line);background:#fafbf9}.context h2{margin:8px 0 24px;font:600 17px/1.35 Georgia,"Songti SC",serif}.context dl{margin:0}.context dl div{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid #e8ece9;font-size:10px}.context dt{color:#89928c}.context dd{margin:0;font-weight:650}.workspace{margin-top:23px;padding:13px;border-radius:10px;background:#edf2ee}.workspace label,.timeline label{display:block;margin-bottom:8px;color:#7c877f;font-size:9px;font-weight:800;letter-spacing:.08em}.workspace code{display:block;overflow-wrap:anywhere;color:#385346;font:9px/1.55 Consolas,monospace}.workspace button{margin-top:9px;padding:5px 8px;border:1px solid #d4ddd7;border-radius:6px;background:white;font-size:9px;cursor:pointer}.timeline{margin-top:28px}.timeline p{display:flex;gap:10px;margin:0 0 15px}.timeline i{display:grid;place-items:center;width:17px;height:17px;border-radius:50%;background:#dfeae3;color:var(--green);font:normal 9px sans-serif}.timeline i.wait{width:9px;height:9px;margin:4px;background:var(--coral);box-shadow:0 0 0 4px #dd6b4515}.timeline span{display:grid;gap:3px}.timeline b{font-size:10px}.timeline small{color:#8b948e;font-size:9px}.toast{position:fixed;z-index:50;left:50%;bottom:28px;transform:translateX(-50%);padding:11px 15px;border-radius:10px;background:#183f32;color:white;box-shadow:0 12px 40px #13281e40;font-size:11px}
@media(max-width:1100px){.layout{grid-template-columns:320px 1fr}.context{display:none}}
@media(max-width:740px){.topbar{height:58px;grid-template-columns:auto 1fr auto;padding:0 14px}.menu{display:block}.brand{justify-self:center}.brand>span{display:none}.connection{display:none}.layout{padding-top:58px;display:block}.sidebar{position:fixed;z-index:15;inset:58px 0 0;transform:translateX(-105%);transition:.2s}.sidebar.open{transform:none}.detail-head{height:64px;padding:12px 18px}.back{display:block}.letter{padding:34px 22px 54px}.letter h2{font-size:29px}}