:root{
  --ink:#161b2e; --muted:#6b7390; --faint:#9aa0b4;
  --primary:#6366f1; --primary-d:#4f46e5; --violet:#8b5cf6;
  --ok:#10b981; --warn:#f59e0b; --err:#ef4444;
  --line:#e8eaf1; --soft:#f6f7fb; --panel:#fff;
  --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.06),0 12px 32px -12px rgba(16,24,40,.12);
  --sidebar:#0f1326; --sidebar-2:#161b34;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--soft);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
svg{display:block}
h1{font-size:27px;margin:0 0 6px;letter-spacing:-.02em} h2{font-size:18px;margin:0 0 14px}
.lead{color:var(--muted);margin:0 0 22px} .muted{color:var(--muted)} .faint{color:var(--faint)} .small{font-size:12px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:7px;background:var(--primary);color:#fff;padding:9px 17px;border-radius:10px;border:none;cursor:pointer;font-size:14px;font-weight:500;transition:.15s}
.btn:hover{background:var(--primary-d);text-decoration:none;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--soft);transform:none}
.btn.block{width:100%;justify-content:center;padding:12px}
.btn.sm{padding:5px 11px;font-size:13px;border-radius:8px}
.btn.danger{background:var(--err)} .btn.ok{background:var(--ok)} .btn.warn{background:var(--warn)}
.btn.white{background:#fff;color:var(--primary-d)}

/* ============ public site ============ */
.nav{display:flex;align-items:center;justify-content:space-between;padding:15px 32px;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.brand{font-weight:700;font-size:18px;color:var(--ink);display:flex;align-items:center;gap:10px}
.brand:hover{text-decoration:none}
.logo{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--violet));color:#fff;font-size:13px;font-weight:800}
.nav nav{display:flex;align-items:center;gap:20px;font-size:14px}
.who{color:var(--muted);font-size:13px;display:flex;align-items:center;gap:6px}
.badge{font-size:11px;padding:1px 8px;border-radius:20px;color:#fff}
.badge.ok{background:var(--ok)} .badge.warn{background:var(--warn)}

.wrap{max-width:1000px;margin:0 auto;padding:36px 22px 60px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px;margin-bottom:22px}
.card.narrow{max-width:430px;margin:48px auto}

/* hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#0f1326,#312e81 70%,#4338ca);color:#fff;border-radius:22px;padding:60px 46px;margin-bottom:30px}
.hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.08) 1px,transparent 0);background-size:22px 22px;opacity:.6}
.hero>*{position:relative;z-index:1}
.hero .tag{display:inline-flex;align-items:center;gap:7px;font-size:12px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);padding:5px 12px;border-radius:20px;margin-bottom:18px}
.hero h1{font-size:40px;line-height:1.15;margin-bottom:14px}
.hero p{color:#c7d2fe;max-width:600px;font-size:16px}
.hero .cta{margin-top:28px;display:flex;gap:12px}
.hero .btn.ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.hero .btn.ghost:hover{background:rgba(255,255,255,.1)}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid.g2{grid-template-columns:repeat(2,1fr)} .grid.g4{grid-template-columns:repeat(4,1fr)}
.feature{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;transition:.15s}
.feature:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.feature .ic{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:11px;background:#eef0fe;color:var(--primary);margin-bottom:14px}
.feature b{display:block;margin-bottom:5px;font-size:15px}

/* ============ app shell ============ */
.app{display:flex;min-height:100vh}
.app-side{width:236px;background:var(--sidebar);color:#aeb4cf;display:flex;flex-direction:column;flex-shrink:0;position:sticky;top:0;height:100vh}
.app-side .sb-brand{display:flex;align-items:center;gap:10px;font-weight:700;color:#fff;padding:20px 22px;font-size:16px;border-bottom:1px solid rgba(255,255,255,.06)}
.app-side .sb-nav{padding:14px 12px;flex:1;display:flex;flex-direction:column;gap:3px}
.app-side .sb-nav a{display:flex;align-items:center;gap:11px;color:#aeb4cf;padding:10px 14px;border-radius:9px;font-size:14px}
.app-side .sb-nav a:hover{background:rgba(255,255,255,.05);color:#fff;text-decoration:none}
.app-side .sb-nav a.active{background:linear-gradient(135deg,var(--primary),var(--violet));color:#fff}
.app-side .sb-nav .grp{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#5b6391;padding:14px 14px 6px}
.app-side .sb-foot{padding:14px;border-top:1px solid rgba(255,255,255,.06)}
.app-side .sb-foot .u{display:flex;align-items:center;gap:9px;font-size:13px;color:#cdd2e8;padding:6px 8px}
.app-side .sb-foot a{color:#8b92b8}
.app-main{flex:1;min-width:0;background:var(--soft)}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 30px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.topbar .crumb{font-size:13px;color:var(--muted)}
.content{padding:28px 30px 60px;max-width:1040px}

/* stat cards */
.stat{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:22px}
.stat .c{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;box-shadow:var(--shadow)}
.stat .c .top{display:flex;align-items:center;justify-content:space-between;color:var(--faint)}
.stat .c .ic{width:34px;height:34px;border-radius:9px;background:#eef0fe;color:var(--primary);display:grid;place-items:center}
.stat .c .n{font-size:28px;font-weight:800;margin-top:8px;letter-spacing:-.02em}
.stat .c .l{color:var(--muted);font-size:13px}

.panel{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:22px;margin-bottom:20px}
.panel .ph{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.panel .ph h2{margin:0}

/* forms */
label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px;font-weight:500}
input,textarea,select{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit;background:#fff;transition:.15s}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.12)}
textarea{min-height:120px;resize:vertical}
.row{display:flex;gap:12px}.row>*{flex:1}
.check{display:flex;align-items:flex-start;gap:8px;margin-top:14px;font-size:13px;color:var(--muted)}
.check input{width:auto;margin-top:3px}

/* alerts */
.alert{display:flex;gap:9px;align-items:flex-start;padding:12px 15px;border-radius:10px;font-size:14px;margin:14px 0}
.alert.err{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.alert.ok{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.alert.warn{background:#fffbeb;color:#92400e;border:1px solid #fde68a}

/* chat */
.chat{display:flex;flex-direction:column;gap:16px;margin-bottom:18px;min-height:120px}
.bubble{display:flex;gap:11px;max-width:84%}
.bubble.user{align-self:flex-end;flex-direction:row-reverse}
.bubble .av{width:34px;height:34px;border-radius:9px;flex-shrink:0;display:grid;place-items:center;color:#fff}
.bubble.user .av{background:linear-gradient(135deg,#0ea5e9,#6366f1)}
.bubble.ai .av{background:linear-gradient(135deg,var(--primary),var(--violet))}
.bubble .body{padding:12px 15px;border-radius:13px;font-size:14px}
.bubble.user .body{background:var(--primary);color:#fff;border-top-right-radius:4px}
.bubble.ai .body{background:#fff;border:1px solid var(--line);border-top-left-radius:4px}
.bubble .body pre{background:#0f1326;color:#e2e8f0;padding:12px;border-radius:9px;overflow:auto;font-size:12.5px;margin:8px 0 0}
.ai-tag{display:inline-flex;align-items:center;gap:5px;margin-top:9px;font-size:11px;color:#fff;background:var(--ok);padding:2px 9px;border-radius:20px}
.meta{margin-top:9px;font-size:11px;color:var(--muted);background:var(--soft);border:1px dashed var(--line);border-radius:8px;padding:9px;white-space:pre-wrap}

/* tables */
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600;background:var(--soft);font-size:12px}
tr:last-child td{border-bottom:none}
.pill{display:inline-block;font-size:11px;padding:2px 9px;border-radius:20px;color:#fff;white-space:nowrap}
.pill.pending{background:var(--warn)} .pill.resolved,.pill.approved{background:var(--ok)}
.pill.rejected,.pill.block{background:var(--err)} .pill.review{background:var(--violet)}
.pill.gray{background:#94a3b8}

/* key box */
.keybox{display:flex;align-items:center;gap:10px;background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-family:ui-monospace,monospace;font-size:13px;word-break:break-all}

/* quota */
.bar{height:10px;background:var(--soft);border-radius:20px;overflow:hidden;border:1px solid var(--line)}
.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--violet))}
.pricecard{border:1px solid var(--line);border-radius:14px;padding:24px}
.pricecard.hot{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.1)}
.pricecard .p{font-size:30px;font-weight:800}
.pricecard ul{list-style:none;padding:0;margin:14px 0;font-size:14px;color:var(--muted)}
.pricecard li{padding:5px 0;display:flex;gap:8px;align-items:center}
.pricecard li svg{color:var(--ok);flex-shrink:0}

/* docs */
.codeblk{background:#0f1326;color:#e2e8f0;border-radius:11px;padding:16px 18px;overflow:auto;font-family:ui-monospace,monospace;font-size:13px;line-height:1.7;margin:12px 0}
.codeblk .k{color:#c4b5fd} .codeblk .s{color:#86efac} .codeblk .c{color:#64748b}
.method{display:inline-block;font-size:11px;font-weight:700;color:#fff;background:var(--ok);padding:2px 8px;border-radius:6px;margin-right:8px}

/* footer */
.foot{max-width:1000px;margin:0 auto;padding:26px 22px 50px;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
.foot div{margin-bottom:6px}
form.inline{display:inline}
@media(max-width:780px){.grid,.grid.g4,.stat{grid-template-columns:1fr 1fr}.app-side{display:none}}