:root{
  --bg:#0A0D14;
  --panel:#0F131C;
  --card:#151A25;
  --card2:#1B2130;
  --line:rgba(255,255,255,.07);
  --line2:rgba(255,255,255,.12);
  --tx:#E8ECF5;
  --tx2:#9AA4B8;
  --tx3:#6B7488;
  --ac:#7C6BFF;
  --ac2:#22D3EE;
  --ok:#31C48D;
  --warn:#F5A623;
  --red:#F2555A;
  --g:#4E8BFF;
  --o:#31C48D;
  --r:14px;
  --sh:0 8px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background:var(--bg);
  color:var(--tx);
  font:14px/1.6 "PingFang SC","Microsoft YaHei","Segoe UI",-apple-system,sans-serif;
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
}
svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
#i-spark,#i-send{}
input,textarea,select,button{font-family:inherit;font-size:inherit;color:inherit;outline:none;border:none;background:none}
textarea{resize:none}
a{cursor:pointer}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.09);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.16)}
::-webkit-scrollbar-track{background:transparent}

.app{display:flex;height:100vh;background:
  radial-gradient(900px 500px at 8% -5%,rgba(124,107,255,.16),transparent 60%),
  radial-gradient(800px 500px at 95% 0%,rgba(34,211,238,.10),transparent 55%),var(--bg);}

/* ---------- Sidebar ---------- */
.sidebar{width:236px;flex:none;display:flex;flex-direction:column;
  background:rgba(12,15,22,.72);backdrop-filter:blur(18px);border-right:1px solid var(--line);}
.brand{display:flex;gap:11px;align-items:center;padding:20px 18px 16px}
.brand-logo{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--ac),var(--ac2));box-shadow:0 6px 18px rgba(124,107,255,.4)}
.brand-logo svg{width:20px;height:20px;fill:#fff;stroke:none}
.brand-txt b{display:block;font-size:15px;letter-spacing:.3px}
.brand-txt span{font-size:11px;color:var(--tx3)}

.nav{flex:1;padding:6px 12px;overflow:auto}
.nav-group{font-size:11px;color:var(--tx3);padding:14px 8px 6px;letter-spacing:1px}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px;
  color:var(--tx2);font-size:13.5px;position:relative;transition:.16s;cursor:pointer;margin-bottom:2px}
.nav-item svg{width:17px;height:17px;opacity:.85}
.nav-item:hover{background:rgba(255,255,255,.05);color:var(--tx)}
.nav-item.active{background:linear-gradient(90deg,rgba(124,107,255,.22),rgba(124,107,255,.05));color:#fff}
.nav-item.active::before{content:"";position:absolute;left:-12px;top:9px;bottom:9px;width:3px;border-radius:3px;background:var(--ac)}
.nav-item .badge{margin-left:auto;font-style:normal;font-size:10px;background:rgba(242,85,90,.16);color:#FF8C90;
  padding:1px 6px;border-radius:20px}
.nav-item .dot,.icon-btn .dot{width:6px;height:6px;border-radius:50%;background:var(--ac2);margin-left:auto}
.icon-btn .dot{position:absolute;top:8px;right:8px;background:var(--red);margin:0}

.side-foot{padding:12px;border-top:1px solid var(--line)}
.quota{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-bottom:10px}
.quota-top{display:flex;justify-content:space-between;font-size:11.5px;color:var(--tx3);margin-bottom:7px}
.quota-top b{color:var(--tx)}
.bar{height:5px;border-radius:5px;background:rgba(255,255,255,.08);overflow:hidden}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--ac),var(--ac2))}
.user{display:flex;gap:10px;align-items:center;padding:4px 4px}
.avatar{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;font-size:13px;
  background:linear-gradient(135deg,#F5A623,#F2555A);color:#fff;font-weight:600}
.user-txt b{display:block;font-size:13px}
.user-txt span{font-size:10.5px;color:var(--tx3)}

/* ---------- Main / Topbar ---------- */
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{height:64px;flex:none;display:flex;align-items:center;gap:16px;padding:0 22px;
  border-bottom:1px solid var(--line);background:rgba(10,13,20,.6);backdrop-filter:blur(14px)}
.omnibox{flex:1;max-width:720px;display:flex;align-items:center;gap:10px;height:40px;padding:0 6px 0 14px;
  background:var(--card);border:1px solid var(--line);border-radius:12px;transition:.2s}
.omnibox:focus-within{border-color:rgba(124,107,255,.6);box-shadow:0 0 0 3px rgba(124,107,255,.12)}
.ob-ico{color:var(--tx3);flex:none}
.omnibox input{flex:1;font-size:13.5px}
.omnibox input::placeholder{color:var(--tx3)}
.scope{display:flex;gap:2px;background:rgba(255,255,255,.05);border-radius:8px;padding:2px}
.sc{font-size:11.5px;padding:4px 9px;border-radius:6px;color:var(--tx3);cursor:pointer}
.sc.active{background:rgba(255,255,255,.1);color:var(--tx)}
.ob-go{height:30px;padding:0 14px;border-radius:8px;font-size:12.5px;cursor:pointer;
  background:linear-gradient(135deg,var(--ac),#6355e0);color:#fff}
.top-right{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{position:relative;width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  color:var(--tx2);border:1px solid var(--line);background:var(--card);cursor:pointer}
.icon-btn:hover{color:var(--tx);border-color:var(--line2)}

.model-pick{position:relative;display:flex;align-items:center;gap:8px;height:36px;padding:0 12px;
  border:1px solid var(--line);background:var(--card);border-radius:10px;font-size:12.5px;cursor:pointer}
.model-pick:hover{border-color:var(--line2)}
.mp-dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 8px var(--ok)}
.mp-arrow{width:14px;height:14px;color:var(--tx3)}
.model-menu{position:absolute;top:44px;right:0;width:280px;background:#131824;border:1px solid var(--line2);
  border-radius:14px;padding:8px;box-shadow:var(--sh);display:none;z-index:50}
.model-menu.open{display:block;animation:pop .16s ease}
@keyframes pop{from{opacity:0;transform:translateY(-6px)}}
.mm-group{font-size:10.5px;color:var(--tx3);padding:8px 10px 4px;letter-spacing:1px}
.mm-item{display:flex;justify-content:space-between;align-items:center;padding:8px 10px;border-radius:9px;font-size:13px}
.mm-item i{font-style:normal;font-size:10.5px;color:var(--tx3)}
.mm-item:hover{background:rgba(124,107,255,.14)}

.scroll{flex:1;overflow:auto;padding:24px 26px 60px}
.page{display:none;animation:fade .25s ease}
.page.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(8px)}}

/* ---------- Generic ---------- */
.card{background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.012));
  border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.card.wide{margin-top:16px}
.card-h{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.card-h h3{font-size:14.5px;font-weight:600;display:flex;align-items:center;gap:8px}
.card-h .sub{font-size:11.5px;color:var(--tx3);font-weight:400}
.card-h a{font-size:12px;color:var(--tx3)}
.card-h a:hover{color:var(--ac2)}
.page-h{margin-bottom:18px}
.page-h h2{font-size:21px;font-weight:600;margin-bottom:6px}
.page-h p{font-size:12.5px;color:var(--tx3);max-width:820px}
.page-h .g{color:var(--g)}
.page-h .o{color:var(--o)}

.btn{display:inline-flex;align-items:center;gap:7px;height:36px;padding:0 15px;border-radius:10px;font-size:13px;
  cursor:pointer;background:var(--card2);border:1px solid var(--line);color:var(--tx);transition:.16s}
.btn:hover{border-color:var(--line2);transform:translateY(-1px)}
.btn svg{width:16px;height:16px}
.btn.primary{background:linear-gradient(135deg,var(--ac),#5B4BE0);border-color:transparent;color:#fff;
  box-shadow:0 6px 18px rgba(124,107,255,.3)}
.btn.block{width:100%;justify-content:center;margin-top:12px}
.btn.sm{height:32px;font-size:12px;padding:0 12px}
.chip{padding:5px 11px;border-radius:20px;font-size:11.5px;border:1px solid var(--line);color:var(--tx2);cursor:pointer}
.chip.on{background:rgba(124,107,255,.18);border-color:rgba(124,107,255,.4);color:#C7BEFF}
.chip.sm{display:inline-flex;gap:5px;align-items:center;padding:4px 9px}
.chip.sm svg{width:13px;height:13px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.sel{height:34px;padding:0 10px;border-radius:9px;background:var(--card);border:1px solid var(--line);
  font-size:12.5px;color:var(--tx2)}
.opt{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--tx2);cursor:pointer}
.opt input{display:none}
.opt span{width:16px;height:16px;border-radius:5px;border:1px solid var(--line2);display:grid;place-items:center;transition:.15s}
.opt input:checked+span{background:var(--ac);border-color:var(--ac)}
.opt input:checked+span::after{content:"";width:8px;height:4px;border-left:2px solid #fff;border-bottom:2px solid #fff;
  transform:rotate(-45deg) translate(1px,-1px)}
.flag{font-size:10.5px;padding:2px 7px;border-radius:6px}
.flag.cn{background:rgba(242,85,90,.16);color:#FF8C90}
.flag.gl{background:rgba(78,139,255,.16);color:#8FB4FF}