*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;color:#1a1a1a;background:#fff;font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}
.hidden{display:none!important}
button{font-family:inherit}

/* ---- login ---- */
.login-wrap{height:100vh;display:flex;align-items:center;justify-content:center;background:#F6F5F2}
.login-card{width:320px;background:#fff;border:1px solid #E4E3DE;border-radius:14px;padding:28px 26px}
.login-card h1{font-size:18px;font-weight:600;margin:0 0 4px;display:flex;align-items:center;gap:8px}
.login-card p{font-size:13px;color:#8c8b83;margin:0 0 18px}
.login-card input{width:100%;height:40px;border:1px solid #D8D7D1;border-radius:9px;padding:0 12px;font-size:14px;margin-bottom:12px;outline:none;font-family:inherit}
.login-card input:focus{border-color:#1a1a1a}
.login-card button{width:100%;height:40px;border:none;border-radius:9px;background:#1a1a1a;color:#fff;font-size:14px;cursor:pointer}
.login-card button:hover{background:#333}
.login-err{color:#b23b3b;font-size:13px;min-height:18px;margin-top:4px}
.gbtn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;height:42px;border:1px solid #D8D7D1;border-radius:9px;background:#fff;color:#3c3c3a;font-size:14px;text-decoration:none;cursor:pointer;margin-bottom:14px}
.gbtn:hover{background:#F6F5F2}
.divider{display:flex;align-items:center;text-align:center;color:#b3b2a8;font-size:12px;margin:2px 0 14px}
.divider:before,.divider:after{content:'';flex:1;height:1px;background:#E7E5DE}
.divider span{padding:0 10px}

/* ---- 账号菜单 ---- */
.avatar{overflow:hidden}
.avatar img{width:100%;height:100%;object-fit:cover;display:block}
.acct-menu{position:fixed;background:#fff;border:1px solid #E0DED6;border-radius:12px;box-shadow:0 8px 28px rgba(0,0,0,.14);padding:6px;min-width:220px;z-index:60}
.acct-head{display:flex;align-items:center;gap:10px;padding:10px 10px 12px}
.apic{width:40px;height:40px;border-radius:50%;overflow:hidden;background:#1a1a1a;color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:500;flex-shrink:0}
.apic img{width:100%;height:100%;object-fit:cover}
.ainfo{min-width:0}
.aname{font-size:14px;font-weight:500;color:#1a1a1a;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.aemail{font-size:12px;color:#8c8b83;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.acct-logout{display:flex;align-items:center;gap:9px;padding:9px 10px;font-size:13px;color:#3a3935;border-top:1px solid #EEEDE8;cursor:pointer}
.acct-logout:hover{background:#F0EFEA;border-radius:8px}
.iconbtn{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:8px;color:#6a6964;cursor:pointer;font-size:13px}
.iconbtn:hover{background:#ECEBE6;color:#1a1a1a}
.pageacts{display:flex;align-items:center;gap:2px;flex-shrink:0}
.pageacts .saved{margin-left:8px}

/* ---- 演示模式(全屏/幻灯片)---- */
#present{position:fixed;inset:0;z-index:1000;background:#fff;display:flex;flex-direction:column}
.present-close{position:absolute;top:14px;right:18px;font-size:22px;line-height:1;color:#6a6964;cursor:pointer;padding:6px 12px;border-radius:8px;z-index:2;user-select:none}
.present-close:hover{background:#ECEBE6;color:#111}
.present-stage{flex:1;overflow:auto;display:flex;justify-content:center}
.present-inner{width:100%;max-width:1040px;padding:64px 60px}
.present-title{font-size:40px;font-weight:600;line-height:1.2;margin:0 0 30px;color:#111}
.present-body{font-size:22px;line-height:1.8;color:#1a1a1a}
.present-body h3{font-size:30px;font-weight:600;margin:26px 0 14px}
.present-body p{margin:0 0 18px}
.present-body ul,.present-body ol{padding-left:28px;margin:0 0 18px}
.present-body table td{padding:8px 14px;font-size:18px}
.present-nav{display:flex;align-items:center;justify-content:center;gap:18px;padding:14px;color:#9b9a95;font-size:13px;flex-shrink:0}
.present-nav button{border:1px solid #D8D7D1;background:#fff;border-radius:8px;width:42px;height:34px;font-size:20px;line-height:1;cursor:pointer;color:#333}
.present-nav button:hover{background:#F0EFEA}

/* ---- 分享弹窗 ---- */
.sharepop{position:fixed;background:#fff;border:1px solid #E0DED6;border-radius:12px;box-shadow:0 8px 28px rgba(0,0,0,.14);padding:14px;width:312px;z-index:60}
.sharepop-title{font-size:12px;color:#6a6964;margin-bottom:9px}
.sharepop-url{width:100%;height:34px;border:1px solid #D8D7D1;border-radius:8px;padding:0 10px;font-size:12px;margin-bottom:10px;background:#F6F5F2;color:#333;font-family:inherit}
.sharepop-copy{width:100%;height:36px;border:none;border-radius:8px;background:#1a1a1a;color:#fff;font-size:14px;cursor:pointer}
.sharepop-copy:hover{background:#333}

/* ---- AI 对话面板 ---- */
.tbar-spacer{flex:1}
.ai-toggle{border:1px solid #D8D7D1;background:#fff;color:#444;font-size:13px;border-radius:8px;padding:5px 12px;cursor:pointer;line-height:1}
.ai-toggle:hover{background:#F0EFEA;color:#111}
.ai-panel{width:380px;flex-shrink:0;min-height:0;background:#fff;border-left:1px solid #E9E8E4;display:flex;flex-direction:column}
.ai-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid #E9E8E4;font-size:14px;font-weight:600}
.ai-close{cursor:pointer;color:#8c8b83;font-size:16px;padding:4px 8px;border-radius:6px}
.ai-close:hover{background:#ECEBE6;color:#111}
.ai-quick{display:flex;gap:8px;padding:10px 14px;border-bottom:1px solid #F0EFEA}
.ai-quick button{border:1px solid #E1E0DA;background:#F6F5F2;color:#444;font-size:12px;border-radius:20px;padding:5px 12px;cursor:pointer;font-family:inherit}
.ai-quick button:hover{background:#ECEBE6}
.ai-msgs{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:12px}
.ai-hint{color:#a9a89f;font-size:13px;text-align:center;margin:auto 0}
.ai-msg{font-size:14px;line-height:1.65;padding:9px 12px;border-radius:12px;max-width:86%;word-break:break-word}
.ai-u{align-self:flex-end;background:#1a1a1a;color:#fff;border-bottom-right-radius:4px}
.ai-a{align-self:flex-start;background:#F1F0EC;color:#1a1a1a;border-bottom-left-radius:4px}
.ai-dots{color:#9b9a95}
.ai-input{border-top:1px solid #E9E8E4;padding:10px 12px;display:flex;gap:8px;align-items:flex-end}
.ai-input textarea{flex:1;border:1px solid #D8D7D1;border-radius:10px;padding:8px 10px;font-size:14px;font-family:inherit;resize:none;outline:none;max-height:120px}
.ai-input textarea:focus{border-color:#1a1a1a}
.ai-input button{border:none;background:#1a1a1a;color:#fff;border-radius:10px;padding:0 16px;height:38px;cursor:pointer;font-size:14px;flex-shrink:0}
.ai-input button:hover{background:#333}
.ai-input button:disabled{opacity:.5;cursor:default}

/* ---- app shell ---- */
#app{display:flex;flex-direction:column;height:100vh}
.top{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid #E9E8E4;background:#F6F5F2;flex-shrink:0}
.brand{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600}
.top-right{display:flex;align-items:center;gap:14px;color:#6a6964;font-size:13px}
.top-right>span:first-child{display:flex;align-items:center;gap:5px}
.avatar{width:28px;height:28px;border-radius:50%;background:#1a1a1a;color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:500;cursor:pointer}
.body{display:flex;flex:1;min-height:0}

/* ---- sidebar ---- */
.side{width:260px;flex-shrink:0;border-right:1px solid #E9E8E4;background:#F6F5F2;padding:12px 8px;display:flex;flex-direction:column}
#tree{flex:1;overflow:auto;line-height:1.4}
.row{display:flex;align-items:center;gap:6px;font-size:13px;color:#54534f;padding:6px 7px;border-radius:8px;cursor:pointer}
.row:hover{background:#E7E6E1}
.prow{font-weight:500;color:#34332f}
.crow{padding-left:30px;color:#5a5954}
.row.sel{background:#E6E5E0;color:#111;font-weight:500}
.nfold{font-size:16px;color:#7d7c73;flex-shrink:0}
.cfile{font-size:14px;flex-shrink:0}
.nname{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.car{font-size:13px;color:#9b9a95;flex-shrink:0;opacity:0;transition:opacity .12s}
.prow:hover .car{opacity:1}
.spacer{flex:1}
.act{opacity:0;font-size:15px;color:#76756c;padding:1px 3px;border-radius:5px;cursor:pointer;flex-shrink:0;transition:opacity .12s}
.prow:hover .act{opacity:1}
.act:hover{color:#111;background:#D4D2C9}
.badge{font-size:11px;border:1px solid currentColor;border-radius:6px;padding:0 5px;opacity:.85;flex-shrink:0}
.nbtn{display:flex;align-items:center;gap:6px;justify-content:center;font-size:13px;padding:9px 10px;border:1px solid #1a1a1a;border-radius:9px;background:#1a1a1a;color:#fff;cursor:pointer;margin-top:10px;user-select:none;flex-shrink:0}
.nbtn:hover{background:#333}

/* ---- editor ---- */
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.crumb{padding:10px 20px;border-bottom:1px solid #E9E8E4;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-shrink:0;min-height:40px}
.cpath{font-size:12px;color:#9b9a95}
.saved{font-size:12px;color:#a9a89f}
.tbar{padding:6px 16px;border-bottom:1px solid #E9E8E4;display:flex;gap:2px;color:#6a6964;flex-shrink:0}
.tbar button{border:none;background:none;color:inherit;font-size:17px;padding:6px 8px;border-radius:6px;cursor:pointer;line-height:1}
.tbar button:hover{background:#EDECE8;color:#111}
.edwrap{flex:1;overflow:auto;display:flex;justify-content:center}
.edinner{width:100%;max-width:900px;padding:28px 32px 120px}
.title-in{width:100%;border:none;outline:none;font-size:26px;font-weight:600;color:#1a1a1a;margin-bottom:14px;background:transparent;font-family:inherit;line-height:1.3}
.title-in::placeholder{color:#cfcdc4}
.ed{outline:none;font-size:15px;line-height:1.75;color:#1a1a1a;min-height:300px}
.ed:empty:before{content:attr(data-ph);color:#bcbab1}
.ed h3{font-size:19px;font-weight:600;margin:18px 0 10px}
.ed p{margin:0 0 12px}
.ed ul,.ed ol{padding-left:22px;margin:0 0 12px}
.ed li{margin:2px 0}
.ed img{max-width:100%;border-radius:8px}
.ed table{border-collapse:collapse;margin:0 0 14px}
.ed td{border:1px solid #D8D7D1;padding:6px 12px}
.ed code{background:#EEEDE8;border-radius:5px;padding:1px 5px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px}
.ed b,.ed strong{font-weight:600}
.imgph{border:1px dashed #D4D3CC;border-radius:8px;padding:18px;text-align:center;color:#9b9a95;font-size:13px;margin:0 0 14px}
.imgph .ic{display:block;margin:0 auto 4px}
.empty{flex:1;display:flex;align-items:center;justify-content:center;color:#b3b2a8;font-size:14px}

/* ---- dropdown menu ---- */
.menu{position:fixed;background:#fff;border:1px solid #E0DED6;border-radius:10px;box-shadow:0 6px 24px rgba(0,0,0,.12);padding:5px;min-width:148px;z-index:50}
.menu div{padding:8px 10px;font-size:13px;border-radius:7px;cursor:pointer;color:#3a3935;display:flex;align-items:center;gap:9px}
.menu div:hover{background:#F0EFEA}
.menu div.danger{color:#b23b3b}
.menu div.danger:hover{background:#fbeeee}

/* inline SVG icons */
.ic{display:inline-block;vertical-align:-0.15em}
.nfold,.car,.cfile,.act{display:inline-flex;align-items:center}
.tbar button{display:inline-flex;align-items:center}
.brand .ic,.login-card h1 .ic{vertical-align:-0.18em}