:root{
  --accent:#0f9d8e;
  --accent-2:#14b8a6;
  --bg:#f4f5f7;
  --panel:#fff;
  --text:#1f2329;
  --muted:#6b7280;
  --line:#e8eaed;
  --danger:#dc2626;
  --warn:#d97706;
  --shadow:0 8px 24px rgba(15,23,42,.06);
  --nav-w:280px;
  --nav-w-collapsed:72px;
  --panel-w:300px;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body.cs-body{
  font-family:"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:var(--bg);
}
a{color:var(--accent);text-decoration:none}
button,input,textarea,select{font-family:inherit}
.cs-landing{
  min-height:100%;
  background:
    radial-gradient(1200px 500px at 10% -10%,rgba(15,157,142,.18),transparent 50%),
    radial-gradient(800px 400px at 100% 0,rgba(37,99,235,.12),transparent 45%),
    #f7f8fa;
}
.cs-nav{
  display:flex;align-items:center;justify-content:space-between;
  max-width:1120px;margin:0 auto;padding:22px 24px;
}
.cs-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text)}
.cs-logo{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--accent),#0d6e63);
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0;
}
.cs-hero{max-width:1120px;margin:0 auto;padding:24px;display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center}
.cs-hero h1{font-size:44px;line-height:1.15;margin:0 0 14px}
.cs-hero p{color:var(--muted);font-size:16px;line-height:1.7;margin:0 0 22px}
.cs-pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.cs-pill{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:12px;color:#374151}
.cs-card{
  background:#fff;border:1px solid rgba(255,255,255,.8);border-radius:18px;
  box-shadow:var(--shadow);padding:28px;
}
.cs-card h2{margin:0 0 6px;font-size:20px}
.cs-card .sub{color:var(--muted);font-size:13px;margin-bottom:18px}
.cs-field{margin-bottom:14px}
.cs-field label{display:block;font-size:12px;color:#4b5563;margin-bottom:6px}
.cs-field input{
  width:100%;height:42px;border:1px solid var(--line);border-radius:10px;
  padding:0 12px;background:#f9fafb;outline:none;
}
.cs-field input:focus{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(15,157,142,.12)}
.cs-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:0;border-radius:10px;height:42px;padding:0 16px;cursor:pointer;font-weight:600;
}
.cs-btn-primary{background:var(--accent);color:#fff;width:100%}
.cs-btn-primary:hover{background:#0d8a7d}
.cs-btn-ghost{background:#fff;border:1px solid var(--line);color:var(--text)}
.cs-error{background:#fef2f2;color:#b91c1c;border-radius:10px;padding:10px 12px;font-size:13px;margin-bottom:12px}
.cs-features{max-width:1120px;margin:0 auto;padding:10px 24px 60px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cs-feature{background:#fff;border-radius:16px;padding:18px;border:1px solid var(--line)}
.cs-feature h3{margin:8px 0 6px;font-size:16px}
.cs-feature p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}

/* ===== Desk: 2~3 columns ===== */
.desk{display:flex;height:100vh;overflow:hidden;background:var(--bg)}

.navside{
  width:var(--nav-w);
  background:#fff;
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  flex-shrink:0;
  transition:width .22s ease;
  overflow:hidden;
}
.desk.is-collapsed .navside{width:var(--nav-w-collapsed)}
.navside-top{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 12px 8px;gap:8px;min-height:56px;
}
.nav-brand{display:flex;align-items:center;gap:10px;min-width:0;flex:1}
.nav-brand-text{min-width:0;overflow:hidden}
.nav-brand-text strong{display:block;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-brand-text em{display:block;font-style:normal;font-size:11px;color:var(--muted);white-space:nowrap}
.nav-collapse{
  width:32px;height:32px;border:1px solid var(--line);border-radius:8px;background:#fff;
  color:#64748b;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.nav-collapse:hover{background:#f8fafc;color:var(--text)}
.nav-collapse svg{width:16px;height:16px;transition:transform .22s ease}
.desk.is-collapsed .nav-collapse svg{transform:rotate(180deg)}
.desk.is-collapsed .nav-brand-text,
.desk.is-collapsed .nav-label,
.desk.is-collapsed .nav-section-title,
.desk.is-collapsed .nav-section-count,
.desk.is-collapsed .side-search,
.desk.is-collapsed .side-list,
.desk.is-collapsed .nav-user-meta{display:none}
.desk.is-collapsed .nav-section{border-top:0;flex:0}
.desk.is-collapsed .navside-top{
  flex-direction:column;justify-content:center;align-items:center;
  padding:12px 8px 4px;gap:8px;
}
.desk.is-collapsed .nav-brand{justify-content:center;flex:0}
.desk.is-collapsed .nav-collapse{margin:0}

.nav-menu{padding:4px 10px 8px;display:flex;flex-direction:column;gap:2px}
.nav-item{
  display:flex;align-items:center;gap:10px;
  width:100%;height:40px;border:0;background:transparent;color:#374151;
  border-radius:10px;padding:0 10px;cursor:pointer;text-align:left;font-size:13px;
}
.nav-item:hover{background:#f3f4f6}
.nav-item.active{background:#ecfdf8;color:#0f766e;font-weight:600}
.nav-item-primary{background:#f3f4f6;font-weight:600;margin-bottom:6px}
.nav-item-primary:hover{background:#e5e7eb}
.nav-ico{
  width:22px;height:22px;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:inherit;
}
.nav-ico svg{width:18px;height:18px}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.desk.is-collapsed .nav-menu{padding:4px 8px;align-items:center}
.desk.is-collapsed .nav-item{width:44px;height:44px;padding:0;justify-content:center;border-radius:12px}
.desk.is-collapsed .nav-item-primary{margin-bottom:8px}

.nav-section{flex:1;min-height:0;display:flex;flex-direction:column;border-top:1px solid var(--line);margin-top:4px}
.nav-section-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px 6px;
}
.nav-section-title{font-size:12px;font-weight:700;color:#6b7280;letter-spacing:.02em}
.nav-section-count{font-size:11px;color:#9ca3af}
.side-search{margin:0 12px 8px}
.side-search input{
  width:100%;height:34px;border:1px solid var(--line);border-radius:8px;padding:0 10px;background:#f8fafc;outline:none;font-size:13px;
}
.side-search input:focus{border-color:var(--accent);background:#fff}
.side-list{flex:1;overflow:auto;padding:0 8px 12px}
.side-item,.market-mini{
  display:flex;gap:10px;align-items:flex-start;padding:10px;border-radius:12px;cursor:pointer;margin-bottom:4px;
}
.side-item:hover,.market-mini:hover,.side-item.active{background:#f3f4f6}
.avatar{
  width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:16px;
}
.side-item b,.market-mini b{display:block;font-size:13px;line-height:1.35}
.side-item span,.market-mini span{display:block;color:var(--muted);font-size:12px;line-height:1.4;margin-top:2px}
.empty-side{color:var(--muted);font-size:12px;padding:20px 12px;text-align:center;line-height:1.6}

.navside-foot{border-top:1px solid var(--line);padding:10px;display:flex;flex-direction:column;gap:4px}
.nav-user{display:flex;align-items:center;gap:10px;padding:6px 8px;min-width:0}
.nav-user-avatar{
  width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,#14b8a6,#0f766e);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex-shrink:0;
  text-transform:uppercase;overflow:hidden;
}
.nav-user-meta{min-width:0;flex:1}
.nav-user-meta b{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-user-meta span{display:block;font-size:11px;color:var(--accent);font-weight:600}
.checkin-btn{
  flex:0 0 auto;border:0;background:rgba(20,184,166,.12);color:var(--accent);font-size:12px;font-weight:700;
  padding:6px 10px;border-radius:8px;cursor:pointer;white-space:nowrap
}
.checkin-btn:hover{background:rgba(20,184,166,.2)}
.checkin-btn.is-done,.checkin-btn:disabled{opacity:.55;cursor:default;background:#f3f4f6;color:#6b7280}
.desk.is-collapsed .checkin-btn{display:none!important}
.checkin-card{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 18px;margin:0 0 18px;border:1px solid #e5e7eb;border-radius:14px;background:linear-gradient(135deg,#f0fdfa,#ffffff)
}
.checkin-card b{font-size:15px}
.checkin-card .cs-btn:disabled,.checkin-panel .cs-btn:disabled{opacity:.55;cursor:default}
.nav-logout{color:#64748b}
.desk.is-collapsed .navside-foot{align-items:center;padding:10px 8px}
.desk.is-collapsed .nav-user{justify-content:center;padding:4px}

/* Workspace = main + optional right panel */
.workspace{flex:1;min-width:0;display:flex;flex-direction:column}
.work-top{
  height:56px;background:rgba(255,255,255,.92);border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;padding:0 20px;backdrop-filter:blur(8px);flex-shrink:0;
}
.work-top .title{font-weight:700;font-size:15px}
.work-top .meta{color:var(--muted);font-size:12px;margin-top:2px}
.work-top-right{display:flex;align-items:center;gap:12px}
.panel-toggle{
  height:30px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:0 10px;
  font-size:12px;cursor:pointer;color:#4b5563;
}
.panel-toggle:hover,.desk.panel-open .panel-toggle{background:#ecfdf8;border-color:#99f6e4;color:#0f766e}

.work-body{flex:1;min-height:0;display:flex}
.work-main{flex:1;min-width:0;display:flex;flex-direction:column;position:relative}
.chat-view{display:flex;flex-direction:column;height:100%;min-height:0}
.chat-body{flex:1;overflow:auto;padding:28px 24px 12px}

.welcome{max-width:820px;margin:32px auto 0;text-align:center}
.welcome h1{font-size:36px;margin:0 0 10px;letter-spacing:-.02em;font-weight:700}
.welcome p{color:var(--muted);margin:0 auto 20px;max-width:560px;line-height:1.7;font-size:14px}
.welcome-pills{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:22px}
.welcome-pills button{
  border:1px solid var(--line);background:#fff;border-radius:999px;height:34px;padding:0 14px;
  font-size:13px;cursor:pointer;color:#374151;
}
.welcome-pills button:hover{border-color:var(--accent);color:#0f766e;background:#ecfdf8}
.suggest{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;text-align:left;margin-top:8px}
.suggest-card{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;cursor:pointer;min-height:110px;
  transition:box-shadow .15s,border-color .15s;
}
.suggest-card:hover{border-color:var(--accent);box-shadow:var(--shadow)}
.suggest-card .thumb{
  height:72px;border-radius:10px;margin-bottom:10px;
  display:flex;align-items:center;justify-content:center;font-size:28px;
}
.suggest-card b{font-size:13px;display:block;line-height:1.4}
.suggest-card .desc{color:#6b7280;font-size:12px;margin-top:6px;line-height:1.45}

.msg{max-width:760px;margin:0 auto 16px;display:flex;gap:10px}
.msg.user{flex-direction:row-reverse}
.bubble{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px;line-height:1.7;white-space:pre-wrap;max-width:80%;
}
.msg.user .bubble{background:#0f9d8e;color:#fff;border-color:transparent}

.chat-input{padding:8px 24px 20px}
.composer{
  max-width:820px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:20px;
  padding:12px 14px 12px;box-shadow:var(--shadow);
}
.composer textarea{
  width:100%;border:0;resize:none;min-height:72px;outline:none;font-size:14px;line-height:1.6;
}
.composer-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.mode-btn,.chip{
  border:1px solid var(--line);background:#f8fafc;border-radius:999px;height:30px;padding:0 10px;cursor:pointer;font-size:12px;
}
.mode-btn.active,.chip.on{background:#ecfdf8;border-color:#99f6e4;color:#0f766e}
.composer-bar .grow{flex:1}
.send{
  margin-left:auto;height:34px;border:0;border-radius:10px;background:var(--accent);color:#fff;padding:0 14px;cursor:pointer;font-weight:700;
}
.send:disabled{opacity:.5;cursor:not-allowed}
.model-select{height:30px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:12px}

.panel{
  width:0;opacity:0;overflow:hidden;background:var(--panel);border-left:1px solid transparent;
  padding:0;flex-shrink:0;transition:width .22s ease,opacity .18s ease,padding .22s ease,border-color .22s;
}
.desk.panel-open .panel{
  width:var(--panel-w);opacity:1;padding:16px;border-left-color:var(--line);overflow:auto;
}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.panel-head h4{margin:0}
.panel-close{
  width:28px;height:28px;border:0;background:#f3f4f6;border-radius:8px;cursor:pointer;font-size:18px;line-height:1;color:#6b7280;
}
.panel h4{margin:0 0 8px;font-size:13px}
.panel .hint{color:var(--muted);font-size:12px;line-height:1.6}
.tag{display:inline-flex;align-items:center;gap:4px;background:#f3f4f6;border-radius:999px;padding:4px 8px;font-size:12px;margin:0 6px 6px 0}
.market-view,.settings-view{padding:20px 24px;overflow:auto;flex:1;height:100%}
.view-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:8px;min-height:180px;
}
.card .ops{margin-top:auto;display:flex;gap:8px}
.card button{height:32px;border-radius:8px;border:1px solid var(--line);background:#fff;cursor:pointer;padding:0 10px}
.card button.primary{background:var(--accent);color:#fff;border:0}
.hidden{display:none !important}
.cost{font-size:12px;color:var(--warn)}
.free{font-size:12px;color:var(--accent)}
.mcp{font-size:11px;color:#0369a1;background:#e0f2fe;border-radius:999px;padding:1px 7px;margin-left:4px}
.settings-form .cs-field{max-width:520px}

@media (max-width:1200px){
  .suggest{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .cs-hero,.cs-features{grid-template-columns:1fr}
  .desk{--nav-w:240px}
  .desk.panel-open .panel{display:none}
  .panel-toggle{display:none}
  .welcome h1{font-size:28px}
}