:root{
  --bg-0:#0b1020;
  --bg-1:#111a36;
  --bg-2:#1a1033;
  --ink:#0f172a;
  --ink-2:#475569;
  --ink-3:#94a3b8;
  --line:#e2e8f0;
  --brand:#4f46e5;
  --brand-2:#7c3aed;
  --brand-3:#06b6d4;
  --ok:#16a34a;
  --warn:#d97706;
  --err:#dc2626;
  --card:#ffffff;
  --radius:18px;
  --shadow:0 10px 30px rgba(2,6,23,.12);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  color:var(--ink);
  background:radial-gradient(1100px 500px at 15% -8%,rgba(99,102,241,.35),transparent 60%),
             radial-gradient(900px 480px at 95% 8%,rgba(34,211,238,.22),transparent 55%),
             radial-gradient(1000px 600px at 50% 120%,rgba(124,58,237,.25),transparent 60%),
             linear-gradient(160deg,var(--bg-0),var(--bg-1) 55%,var(--bg-2));
  min-height:100vh;
  line-height:1.6;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit}

.shell{max-width:560px;margin:0 auto;padding:0 16px 48px}

/* header */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 0 10px}
.brand{display:flex;align-items:center;gap:10px;color:#fff}
.brand-mark{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-3));box-shadow:0 6px 16px rgba(79,70,229,.45)}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.5px}
.brand-sub{font-size:11px;color:#94a3b8;margin-top:-3px}
.query-link{color:#cbd5e1;font-size:13px;border:1px solid rgba(255,255,255,.22);border-radius:999px;
  padding:7px 14px;background:rgba(255,255,255,.06);transition:.2s}
.query-link:hover{background:rgba(255,255,255,.14)}

/* hero */
.hero{text-align:center;padding:34px 8px 30px;color:#fff}
.hero h1{font-size:30px;font-weight:800;letter-spacing:1px;line-height:1.3;
  background:linear-gradient(92deg,#fff 20%,#a5b4fc 60%,#67e8f9);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{margin-top:10px;font-size:14px;color:#aab4d3}
.hero-tags{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:16px}
.hero-tags span{font-size:12px;color:#dbe4ff;border:1px solid rgba(165,180,252,.35);
  background:rgba(99,102,241,.14);padding:5px 12px;border-radius:999px}

/* notice */
.notice{display:none;border-radius:12px;padding:12px 14px;font-size:13px;margin-bottom:14px}
.notice.show{display:flex;gap:8px;align-items:flex-start}
.notice.warn{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412}
.notice.err{background:#fef2f2;border:1px solid #fecaca;color:#991b1b}
.notice.ok{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534}

/* main card */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px 20px 26px}
.steps{display:flex;align-items:center;justify-content:center;gap:0;margin-bottom:22px}
.step{display:flex;align-items:center;gap:8px}
.step .dot{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:700;
  background:#eef2ff;color:#6366f1;border:2px solid #c7d2fe;transition:.25s}
.step .lab{font-size:12px;color:var(--ink-3);transition:.25s}
.step.done .dot{background:var(--brand);border-color:var(--brand);color:#fff}
.step.done .lab{color:var(--brand)}
.step.active .dot{background:#fff;border-color:var(--brand);color:var(--brand);box-shadow:0 0 0 4px rgba(99,102,241,.15)}
.step.active .lab{color:var(--ink);font-weight:600}
.step-line{width:44px;height:2px;background:#e2e8f0;margin:0 8px;border-radius:2px}

.step-title{font-size:16px;font-weight:700;margin-bottom:4px}
.step-desc{font-size:12.5px;color:var(--ink-2);margin-bottom:16px}

label.field{display:block;font-size:13px;font-weight:600;margin:14px 0 6px;color:var(--ink)}
label.field .req{color:var(--err)}
input[type=text],input[type=password],textarea{
  width:100%;border:1.5px solid var(--line);border-radius:12px;padding:13px 14px;font-size:15px;
  color:var(--ink);background:#fbfcfe;outline:none;transition:.18s;font-family:inherit}
input:focus,textarea:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(99,102,241,.12)}
textarea{min-height:120px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px}
.hint{font-size:12px;color:var(--ink-3);margin-top:6px}
.help-link{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--brand);cursor:pointer;margin-top:6px}

.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;border:none;border-radius:13px;
  height:50px;font-size:15.5px;font-weight:700;cursor:pointer;transition:.18s;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 8px 20px rgba(99,102,241,.35)}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:scale(.985)}
.btn:disabled{opacity:.6;cursor:not-allowed;filter:none}
.btn.ghost{background:#f1f5f9;color:var(--ink);box-shadow:none;border:1px solid var(--line)}
.btn.ghost:hover{background:#e2e8f0}
.btn-row{display:flex;gap:10px;margin-top:18px}
.btn-row .btn{flex:1}
.spin{width:18px;height:18px;border:2.5px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:sp 0.7s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

/* platform grid */
.plats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.plat{border:1.5px solid var(--line);border-radius:14px;padding:14px 12px;text-align:center;cursor:pointer;transition:.18s;background:#fff}
.plat:hover{border-color:#c7d2fe;background:#f8faff;transform:translateY(-1px)}
.plat.sel{border-color:var(--brand);background:linear-gradient(180deg,#eef2ff,#f5f3ff);box-shadow:0 4px 14px rgba(99,102,241,.18)}
.plat .ic{width:40px;height:40px;border-radius:12px;margin:0 auto 8px;display:grid;place-items:center;background:#f1f5f9}
.plat.sel .ic{background:#e0e7ff}
.plat .nm{font-size:14px;font-weight:700}
.plat .ds{font-size:11px;color:var(--ink-3);margin-top:2px}
.plat svg{width:22px;height:22px}

/* result */
.result{text-align:center;padding:8px 4px 4px}
.result-ic{width:64px;height:64px;border-radius:50%;margin:0 auto 14px;display:grid;place-items:center}
.result-ic.pending{background:#eff6ff;border:2px solid #bfdbfe}
.result-ic.ok{background:#f0fdf4;border:2px solid #bbf7d0}
.result-ic.err{background:#fef2f2;border:2px solid #fecaca}
.result h3{font-size:19px;font-weight:800}
.result .msg{font-size:13.5px;color:var(--ink-2);margin-top:6px}
.order-no{margin:16px auto 0;background:#f8fafc;border:1px dashed #cbd5e1;border-radius:12px;padding:10px 14px;
  display:flex;align-items:center;justify-content:space-between;gap:10px;max-width:340px}
.order-no b{font-size:13px;color:var(--ink);word-break:break-all;font-family:ui-monospace,Consolas,monospace}
.copy{font-size:12px;color:var(--brand);border:1px solid #c7d2fe;border-radius:8px;padding:5px 10px;cursor:pointer;background:#fff;white-space:nowrap}
.copy:hover{background:#eef2ff}
.timeline{text-align:left;margin:22px auto 0;max-width:340px;position:relative}
.tl-item{display:flex;gap:12px;position:relative;padding-bottom:20px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:12px;top:26px;bottom:2px;width:2px;background:#e2e8f0}
.tl-item:last-child::before{display:none}
.tl-dot{width:26px;height:26px;border-radius:50%;flex:none;display:grid;place-items:center;background:#e2e8f0;color:#fff}
.tl-item.active .tl-dot{background:var(--brand);box-shadow:0 0 0 4px rgba(99,102,241,.15)}
.tl-item.ok .tl-dot{background:var(--ok)}
.tl-item.err .tl-dot{background:var(--err)}
.tl-item.queued .tl-dot{background:#e2e8f0;color:#94a3b8}
.tl-t{font-size:13.5px;font-weight:700}
.tl-d{font-size:12px;color:var(--ink-3);margin-top:1px}
.result-actions{margin-top:24px}

/* order query */
.query-box{text-align:left}
.query-form{display:flex;gap:10px;margin-top:4px}
.query-form input{flex:1}
.query-form .btn{width:auto;padding:0 22px;height:50px;flex:none}

/* faq */
.faq{margin-top:26px}
.faq h2{font-size:16px;font-weight:800;color:#e2e8f0;margin-bottom:12px;text-align:center}
.faq details{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:13px;margin-bottom:9px;overflow:hidden}
.faq summary{cursor:pointer;padding:13px 16px;font-size:13.5px;color:#e2e8f0;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:#94a3b8;font-size:18px;transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .body{padding:0 16px 14px;font-size:12.5px;color:#b6c0dd;line-height:1.8}
.faq .body code{background:rgba(255,255,255,.1);padding:1px 6px;border-radius:6px;font-size:12px}

/* footer */
.footer{margin-top:34px;text-align:center;font-size:12px;color:#64748b;line-height:1.9}
.footer .s1{color:#94a3b8}

/* hidden */
.view{display:none}
.view.show{display:block;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

@media (max-width:380px){
  .hero h1{font-size:26px}
  .plats{grid-template-columns:repeat(2,1fr)}
}