:root{
  --bg:#0b1020; --card:#151c30; --line:#27314d; --text:#e8ecf7; --muted:#9aa6c2;
  --accent:#5b8cff; --accent2:#7ef0c2; --warn:#ffcc66; --danger:#ff6b6b;
  --radius:16px; --max:980px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:linear-gradient(180deg,#0b1020,#0e1426 60%,#0b1020);color:var(--text);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
a{color:var(--accent2);text-decoration:none}
a:hover{text-decoration:underline}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:12px 16px;background:rgba(11,16,32,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{font-weight:800;letter-spacing:.5px;color:#fff;font-size:18px}
.brand span{color:var(--accent2);font-weight:600}
nav{display:flex;gap:14px;flex-wrap:wrap;font-size:14px}
nav a{color:var(--muted)}
nav a:hover{color:#fff}
.wrap{max-width:var(--max);margin:0 auto;padding:22px 16px 60px}
.hero{padding:34px 0 20px}
.hero h1{font-size:34px;line-height:1.2;margin:0 0 12px}
.hero p{color:var(--muted);font-size:17px;max-width:720px}
.grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:760px){.grid.two{grid-template-columns:1fr 1fr}.hero h1{font-size:44px}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.card h2,.card h3{margin-top:0}
.muted{color:var(--muted)}
.small{font-size:13px}
.btn{display:inline-block;padding:10px 16px;border-radius:999px;border:1px solid var(--accent);
  background:var(--accent);color:#fff;font-weight:700;cursor:pointer}
.btn:hover{filter:brightness(1.08);text-decoration:none}
.btn.ghost{background:transparent;color:var(--accent2);border-color:var(--line)}
.btn.danger{background:transparent;color:var(--danger);border-color:var(--danger)}
.btn:disabled{opacity:.5;cursor:not-allowed}
label{display:block;margin:12px 0 6px;font-weight:600;font-size:14px}
input,textarea,select{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--line);
  background:#0e1426;color:var(--text);font:inherit}
textarea{min-height:90px;resize:vertical}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;background:#1d2742;color:var(--accent2);font-size:12px}
.stat{font-size:28px;font-weight:800;color:#fff}
.stat-label{color:var(--muted);font-size:13px}
.notice{padding:10px 12px;border-radius:10px;background:#1d2742;border:1px solid var(--line);color:var(--muted)}
.error{color:var(--danger)}
.chat{display:flex;flex-direction:column;gap:10px;min-height:320px;max-height:56vh;overflow:auto;
  padding:12px;border:1px solid var(--line);border-radius:12px;background:#0e1426}
.msg{max-width:86%;padding:10px 12px;border-radius:14px;white-space:pre-wrap}
.msg.user{align-self:flex-end;background:#24406f}
.msg.assistant{align-self:flex-start;background:#1b243b}
.chat-input{display:flex;gap:8px;margin-top:10px}
.chat-input input{flex:1}
.chat-input button{width:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:10px 8px;border-bottom:1px solid var(--line);text-align:left}
th{color:var(--muted);font-weight:600;font-size:13px}
.footer{max-width:var(--max);margin:0 auto;padding:22px 16px 40px;border-top:1px solid var(--line);
  color:var(--muted);font-size:13px}
.footer a{color:var(--muted)}
.price{font-size:30px;font-weight:800;color:#fff}
.price small{font-size:13px;color:var(--muted);font-weight:500}
ul.clean{padding-left:18px}
ul.clean li{margin:6px 0}
.badge{display:inline-block;padding:2px 8px;border-radius:6px;background:#223055;color:var(--accent2);font-size:12px}
img.thumb{width:100%;max-width:360px;border-radius:12px;border:1px solid var(--line)}
hr{border:0;border-top:1px solid var(--line);margin:18px 0}

@media (max-width:360px){.hero h1{font-size:30px}}
.loading{position:fixed;inset:0;z-index:99;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;background:rgba(11,16,32,.82);backdrop-filter:blur(6px);text-align:center;padding:24px}
.loading.hidden{display:none}
.spinner{width:46px;height:46px;border-radius:50%;border:4px solid #2a3554;border-top-color:var(--accent2);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.typing{opacity:.75;font-style:italic}

.qr{width:150px;height:auto;border-radius:12px;border:1px solid var(--line);background:#fff;padding:6px;margin-top:8px}
@media(max-width:480px){.qr{width:130px}}

.captcha{width:120px;height:44px;border-radius:8px;border:1px solid var(--line);cursor:pointer;background:#fff}