*{box-sizing:border-box}
:root{--green:#07c160;--green2:#10c96a;--bg:#f5f7f9;--panel:#fff;--text:#202225;--muted:#8b949e;--line:#e9edf0;--dark:#24272a;--sidebar:#f9fafb}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Segoe UI","Microsoft YaHei",Arial,sans-serif;overflow:hidden}
button,input,textarea{font:inherit}
button{cursor:pointer}
.app-shell{height:100vh;display:flex}
.rail{width:70px;background:var(--dark);display:flex;flex-direction:column;align-items:center;padding:15px 0;color:#aeb5bc;box-shadow:inset -1px 0 #303438;z-index:5}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(145deg,#15cf73,#04ad56);color:#fff;display:grid;place-items:center;font-weight:900;font-size:21px;box-shadow:0 7px 20px #07c16035;margin-bottom:19px}
.rail-btn{width:46px;height:46px;border:0;background:transparent;border-radius:12px;color:#aeb5bc;display:grid;place-items:center;text-decoration:none;font-size:20px;margin:3px 0;transition:.18s}
.rail-btn:hover{background:#303438;color:#fff;transform:translateY(-1px)}
.rail-btn.active{background:#34383c;color:#fff}
.rail-spacer{flex:1}
.sidebar{width:278px;background:var(--sidebar);border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0}
.sidebar-top{padding:19px 16px 12px;display:flex;align-items:center;justify-content:space-between}
.user-mini{min-width:0}
.user-mini .mini-wrap{display:flex;align-items:center;gap:10px}
.avatar{width:42px;height:42px;border-radius:12px;background:#e8f8ef;color:#078b47;display:grid;place-items:center;overflow:hidden;font-weight:800;flex:none}
.avatar.small{width:34px;height:34px;border-radius:10px;font-size:13px}
.avatar img{width:100%;height:100%;object-fit:cover}
.mini-text{min-width:0}.mini-text b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:160px}.mini-text small{color:var(--muted)}
.round-btn{width:34px;height:34px;border:0;border-radius:10px;background:#edf0f2;color:#5d646b;font-size:20px}
.search-box{margin:0 14px 10px;height:39px;border-radius:10px;background:#eef1f3;display:flex;align-items:center;padding:0 11px;color:#8b949e}
.search-box input{width:100%;border:0;outline:0;background:transparent;margin-left:7px;color:#333}
.section-tabs{display:flex;padding:2px 12px 8px;gap:4px}
.tab{border:0;background:transparent;color:#90979e;padding:7px 12px;border-radius:8px;font-size:12px}
.tab.active{background:#e8f8ef;color:#078b47;font-weight:700}
.side-list{padding:0 8px;overflow:auto;flex:1}
.side-item{display:flex;gap:10px;align-items:center;padding:11px 9px;border-radius:11px;margin:2px 0;cursor:pointer;transition:.15s}
.side-item:hover{background:#eef1f3}.side-item.active{background:#e6f6ed}
.side-copy{min-width:0;flex:1}.side-copy b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px}
.side-copy small{display:block;color:#969da4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:3px;font-size:11px}
.side-time{font-size:10px;color:#a2a8ae;align-self:flex-start;margin-top:2px}
.sidebar-footer{height:45px;border-top:1px solid var(--line);padding:0 15px;display:flex;align-items:center;justify-content:space-between;color:#9aa1a8;font-size:11px}
#onlineState{color:#07a956}
.workspace{flex:1;min-width:0;display:flex;flex-direction:column;background:#f7f8fa}
.topbar{height:74px;padding:0 28px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.84);backdrop-filter:blur(14px);display:flex;align-items:center;justify-content:space-between}
.eyebrow{font-size:11px;color:#9aa1a8;margin-bottom:3px}.topbar h1{font-size:21px;margin:0;letter-spacing:-.2px}
.top-actions{display:flex;align-items:center;gap:10px}.top-user{display:flex;align-items:center;gap:9px}
.top-user span{font-size:13px;font-weight:700}.top-actions button{border:0;border-radius:9px;padding:8px 11px;background:#eef0f2;color:#555}
.top-actions .primary{background:var(--green);color:#fff}
.content{flex:1;overflow:auto;padding:25px 28px 35px}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#e8f9ef 0%,#f9fcfa 55%,#eef8f3 100%);border:1px solid #d9eee1;border-radius:21px;padding:31px;margin-bottom:18px;box-shadow:0 10px 35px #0a8f4510}
.hero:after{content:"";position:absolute;width:190px;height:190px;border-radius:50%;right:-45px;top:-70px;background:#07c16012}
.hero h2{font-size:25px;margin:0 0 8px;position:relative;z-index:1}.hero p{color:#6f7973;margin:0 0 18px;position:relative;z-index:1}
.primary{border:0;background:var(--green);color:#fff;padding:10px 15px;border-radius:10px;font-weight:700}
.primary:hover{background:#06ae57}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}
.card,.panel{background:#fff;border:1px solid var(--line);border-radius:17px;padding:20px;box-shadow:0 6px 25px #16212b07}
.card{min-height:145px}.card h3,.panel h2{margin:0 0 8px}.card p{color:var(--muted);font-size:13px;line-height:1.6}
.icon-badge{width:42px;height:42px;border-radius:12px;background:#edf9f2;display:grid;place-items:center;font-size:20px;margin-bottom:13px}
.chat{height:calc(100vh - 134px);display:flex;flex-direction:column;max-width:1040px;margin:auto;width:100%}
.chat-head{background:#fff;border:1px solid var(--line);border-radius:16px 16px 0 0;padding:13px 16px;display:flex;align-items:center;gap:10px}
.chat-head .grow{flex:1}.chat-head b{display:block}.chat-head small{color:var(--muted)}
.messages{flex:1;background:#fff;border-left:1px solid var(--line);border-right:1px solid var(--line);padding:20px;overflow:auto}
.msg{max-width:min(72%,580px);margin:7px 0;padding:10px 13px;background:#f0f2f4;border-radius:6px 14px 14px 14px;line-height:1.55;font-size:14px}
.msg.mine{margin-left:auto;background:#d9f7e5;border-radius:14px 6px 14px 14px}
.msg small{display:block;color:#9299a1;font-size:10px;margin-bottom:4px}.msg .mine-label{color:#078b47}
.file-preview{max-width:320px;max-height:260px;border-radius:10px;display:block;margin-top:8px}
.composer{background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;padding:11px;display:flex;gap:7px;align-items:center}
.composer input[name=body]{flex:1;min-width:0;padding:11px 12px;border:1px solid #e0e4e7;border-radius:10px;outline:0}.composer input[name=body]:focus{border-color:#8fdcb2}
.composer input[type=file]{width:210px;font-size:11px;color:#777}.composer button{border:0;border-radius:9px;padding:10px 12px;background:#eef0f2;color:#555}.composer button:last-of-type{background:var(--green);color:#fff}
.list-item{display:flex;align-items:center;gap:11px;padding:13px 0;border-bottom:1px solid #f0f2f4}.grow{flex:1;min-width:0}.muted{color:var(--muted);font-size:12px}
.list-item button{border:0;border-radius:8px;padding:7px 9px;background:#eef0f2;color:#555}.list-item button.primary{background:var(--green);color:#fff}
.post{padding:16px 0;border-bottom:1px solid #edf0f2}.post h3{margin:0 0 5px;font-size:17px}.post p{line-height:1.75;color:#555}
.mini-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.mini-grid a{border:1px solid var(--line);border-radius:14px;padding:17px;text-decoration:none;color:#222;background:#fff;transition:.15s}.mini-grid a:hover{border-color:#bfe8ce;transform:translateY(-2px);box-shadow:0 10px 24px #00000009}.mini-icon{font-size:25px;margin-bottom:8px}
.empty{text-align:center;color:#9aa1a8;padding:42px 15px;font-size:13px}
.modal{position:fixed;inset:0;background:#10131572;backdrop-filter:blur(4px);display:grid;place-items:center;z-index:50}.modal.hidden{display:none}
.dialog{width:min(510px,calc(100% - 30px));background:#fff;border-radius:20px;padding:24px;box-shadow:0 30px 100px #0005}.dialog h2{margin-top:0}.dialog input,.dialog textarea{width:100%;padding:11px;margin:6px 0 10px;border:1px solid #dfe3e6;border-radius:10px;outline:0}.dialog textarea{min-height:105px;resize:vertical}.dialog button{border:0;border-radius:9px;padding:10px 14px;background:var(--green);color:#fff}
#toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,15px);opacity:0;background:#24272a;color:#fff;padding:10px 15px;border-radius:10px;font-size:13px;z-index:100;pointer-events:none;transition:.2s}.toast-show{opacity:1!important;transform:translate(-50%,0)!important}
.auth-card{max-width:520px;margin:35px auto}
@media(max-width:900px){.sidebar{width:235px}.grid{grid-template-columns:1fr}.mini-grid{grid-template-columns:1fr 1fr}.content{padding:18px}.topbar{padding:0 18px}}
@media(max-width:650px){.rail{width:58px}.sidebar{display:none}.workspace{width:calc(100% - 58px)}.topbar{height:66px}.content{padding:13px}.mini-grid{grid-template-columns:1fr}.chat{height:calc(100vh - 95px)}.composer input[type=file],.composer button:nth-last-of-type(2){display:none}.msg{max-width:84%}}