*{box-sizing:border-box}
:root{
  --bg:#050609;
  --panel:#08090d;
  --card:#0b0d12;
  --card2:#0f1118;
  --line:rgba(255,255,255,.075);
  --line2:rgba(255,255,255,.12);
  --text:#f4f7ff;
  --muted:#8f9bb0;
  --blue:#2aa8ff;
  --cyan:#19d7ff;
  --green:#17e47d;
  --orange:#ff9f1a;
  --red:#ff4d4f;
}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;font-size:15px}
a{color:inherit;text-decoration:none}
button,.btn{border:0;border-radius:12px;padding:10px 18px;background:#f7f8fb;color:#06070a;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px}
button:hover,.btn:hover{filter:brightness(1.06)}
.btn.blue,button.blue{background:linear-gradient(135deg,#14c8ff,#2f8dff);color:#fff;box-shadow:0 12px 30px rgba(20,200,255,.18)}
.btn.dark{background:#0f1118;color:#fff;border:1px solid var(--line)}
.btn.red{background:#ff4d4f;color:#fff}
input,textarea,select{width:100%;padding:12px 14px;border-radius:12px;background:#06070b;border:1px solid var(--line2);color:#fff;outline:none;margin:7px 0 13px}
textarea{min-height:86px}
input:focus,textarea:focus,select:focus{border-color:rgba(42,168,255,.75);box-shadow:0 0 0 3px rgba(42,168,255,.12)}
label{color:#c9d4e7;font-weight:700}
.app{min-height:100vh;background:radial-gradient(circle at 100% 0%,rgba(42,168,255,.06),transparent 28%),radial-gradient(circle at 0% 100%,rgba(255,159,26,.08),transparent 30%),var(--bg)}
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:250px;background:#030407;border-right:1px solid var(--line);
  display:flex;z-index:20;
}
.sidebar:before{
  content:"";width:64px;min-width:64px;background:#050609;border-right:1px solid var(--line);
}
.brand{
  position:fixed;left:80px;top:18px;display:flex;align-items:center;gap:10px;height:42px;z-index:30;
}
.logo{
  width:36px;height:36px;border-radius:13px;background:linear-gradient(135deg,#23d8ff,#308bff,#7657ff);
  display:flex;align-items:center;justify-content:center;font-weight:900;font-size:13px;box-shadow:0 0 24px rgba(35,216,255,.35)
}
.brand h1{margin:0;font-size:18px;letter-spacing:.2px}.brand p{display:none}
.nav{position:fixed;left:78px;top:84px;width:170px;z-index:31}
.nav a{
  display:flex;align-items:center;gap:10px;height:50px;padding:0 14px;margin:6px 0;border-radius:12px;color:#d8e3f6;font-weight:700;
}
.nav a:hover,.nav a.active{background:#1e1f29;color:#fff}
.nav a.pro:after{content:"Pro";margin-left:auto;font-size:11px;color:#ffb020;background:rgba(255,176,32,.13);padding:3px 8px;border-radius:999px}
.main{margin-left:250px;min-height:100vh}
.topbar{
  position:sticky;top:0;height:74px;background:rgba(3,4,7,.9);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px;z-index:10
}
.topbar>div:first-child{font-size:20px;font-weight:900}
.topbar .right-actions{display:flex;align-items:center;gap:12px}
.avatar{width:42px;height:42px;border-radius:999px;background:#268cff;display:flex;align-items:center;justify-content:center;font-weight:900}
.content{padding:28px 36px 50px;max-width:1720px;margin:0 auto}
.cards{display:grid;grid-template-columns:repeat(4,minmax(230px,1fr));gap:20px;margin:22px 0}
.card{
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 22px 70px rgba(0,0,0,.22)
}
.card:hover{border-color:rgba(42,168,255,.28);transform:translateY(-1px);transition:.18s}
.card h3{font-size:22px;margin:0 0 14px;font-weight:900}
.card p{color:#9eb0c9;line-height:1.65;margin:0 0 16px;font-size:16px}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:20px}
.stat-card{
  min-height:126px;background:#050609;border:1px solid var(--line);border-radius:16px;padding:24px 28px;position:relative;
}
.stat-title{font-size:20px;font-weight:900;margin-bottom:16px}.stat-num{font-size:32px;font-weight:900}.stat-sub{color:var(--green);font-size:14px;margin-left:8px}.stat-icon{position:absolute;right:26px;top:26px;font-size:34px;opacity:.9}
.panel{background:#050609;border:1px solid var(--line);border-radius:18px;padding:24px;margin:20px 0}
.panel h2{margin:0 0 18px;font-size:22px}
.table{width:100%;border-collapse:separate;border-spacing:0;background:transparent;overflow:hidden}
.table th{
  background:#1d1f25;color:#fff;text-align:left;padding:16px 18px;font-size:16px;font-weight:900;border-bottom:1px solid var(--line)
}
.table th:first-child{border-top-left-radius:14px;border-bottom-left-radius:14px}.table th:last-child{border-top-right-radius:14px;border-bottom-right-radius:14px}
.table td{padding:15px 18px;border-bottom:1px solid rgba(255,255,255,.055);color:#dce7f7;vertical-align:top}
.table tr:hover td{background:rgba(255,255,255,.025)}
.notice{padding:14px 16px;border-radius:14px;background:rgba(42,168,255,.10);border:1px solid rgba(42,168,255,.25);color:#d9f5ff;margin:16px 0}
.form{max-width:900px;background:#050609;border:1px solid var(--line);border-radius:18px;padding:24px;margin:20px 0}
.form h2{margin-top:0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.tag{display:inline-flex;align-items:center;border-radius:999px;padding:5px 10px;background:rgba(42,168,255,.12);color:#78d8ff;font-size:12px;margin:4px 6px 0 0}
.hero{text-align:center;padding:40px 0 24px}
.hero .ai-icon{width:128px;height:128px;border-radius:34px;margin:0 auto 20px;background:linear-gradient(135deg,#20d4ff,#338fff,#7b61ff);display:flex;align-items:center;justify-content:center;font-size:58px;box-shadow:0 0 46px rgba(32,212,255,.28)}
.hero h2{font-size:34px;margin:0 0 10px}.hero p{color:#9eb0c9}
.chatbox{max-width:1080px;margin:0 auto 28px;background:#050609;border:1px solid var(--line);border-radius:18px;overflow:hidden}
.messages{height:460px;overflow:auto;padding:24px}
.msg{margin:14px 0;display:flex}.msg.user{justify-content:flex-end}
.bubble{max-width:78%;padding:15px 17px;border-radius:18px;line-height:1.7;white-space:pre-wrap}
.user .bubble{background:#238aff;color:#fff}.bot .bubble{background:#12151c;border:1px solid var(--line)}
.composer{display:flex;gap:12px;padding:16px;border-top:1px solid var(--line)}
.composer textarea{flex:1;height:58px;resize:none;margin:0}.composer select{width:230px;margin:0}
.admin-title{display:flex;align-items:center;justify-content:space-between;margin:0 0 18px}
.admin-title h2{margin:0;font-size:26px}
.admin-sub{color:#8fa3bd}
.quick-actions{display:flex;gap:10px;flex-wrap:wrap}
@media(max-width:1200px){.cards{grid-template-columns:repeat(2,1fr)}.stat-grid{grid-template-columns:1fr}}
@media(max-width:820px){
  .sidebar{position:relative;width:100%;height:auto;display:block}.sidebar:before{display:none}.brand,.nav{position:relative;left:auto;top:auto;width:auto;padding:12px 18px}
  .nav a{display:inline-flex;margin:4px}.main{margin-left:0}.topbar{position:relative}.content{padding:18px}.cards{grid-template-columns:1fr}.grid2{grid-template-columns:1fr}.composer{display:block}.composer select{width:100%;margin-bottom:10px}.bubble{max-width:92%}
}