:root {
  --bg: #0a0e1a;
  --panel: #111626;
  --panel-2: #161d31;
  --border: #222b45;
  --text: #e6eaf4;
  --muted: #8a93ac;
  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --green: #10b981;
  --green-2: #34d399;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 70% -10%, #1a1f3a 0%, var(--bg) 55%);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
}
.wrap { max-width: 1280px; margin: 0 auto; padding: 28px 24px 80px; }

/* 顶部 */
.topbar { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; font-size: 24px; color: #fff; font-weight: 700;
}
.brand h1 { margin: 0; font-size: 22px; }
.brand p { margin: 2px 0 0; color: var(--muted); font-size: 13px; }

.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 16px; padding: 22px;
}
.auth { width: 440px; max-width: 100%; }
.auth h3 { margin: 0 0 2px; }
.auth .hint { color: var(--muted); font-size: 13px; margin: 0 0 14px; }
.auth-row { display: flex; gap: 10px; margin-bottom: 10px; }
input {
  flex: 1; background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px; color: var(--text); font-size: 14px;
}
input:focus { outline: none; border-color: var(--accent); }

button { cursor: pointer; border: none; border-radius: 10px; font-size: 14px; font-weight: 600; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; padding: 12px 22px; }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); padding: 12px 22px; }
.btn-green { background: linear-gradient(135deg, var(--green), var(--green-2)); color: #06281d; padding: 12px 18px; width: 100%; }
button:disabled { opacity: .5; cursor: not-allowed; }

.userbox { display: flex; align-items: center; gap: 16px; }
.balance { font-size: 15px; }
.balance b { font-size: 20px; color: var(--green-2); }

/* 主区 */
.main { display: grid; grid-template-columns: 1fr 340px; gap: 22px; margin-top: 24px; }
@media (max-width: 980px) { .main { grid-template-columns: 1fr; } }

.engine h2 { text-align: center; font-size: 26px; margin: 6px 0; }
.engine .desc { text-align: center; color: var(--muted); font-size: 14px; margin: 0 0 22px; }

.dropzone {
  border: 2px dashed var(--border); border-radius: 14px; padding: 38px;
  text-align: center; cursor: pointer; transition: .15s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: rgba(99,102,241,.06); }
.dropzone .title { font-size: 18px; font-weight: 700; }
.dropzone .sub { color: var(--muted); font-size: 13px; margin-top: 6px; }
.dropzone .file { color: var(--green-2); margin-top: 10px; font-size: 14px; }

.sliders { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 22px; }
@media (max-width: 640px) { .sliders { grid-template-columns: 1fr; } }
.slider {
  background: var(--panel-2); border-left: 3px solid var(--accent);
  border-radius: 10px; padding: 16px 18px;
}
.slider .head { display: flex; justify-content: space-between; font-weight: 600; }
.slider .val { color: var(--text); }
.slider input[type=range] { width: 100%; margin: 12px 0 6px; accent-color: var(--accent); }
.slider .tip { color: var(--muted); font-size: 12px; line-height: 1.5; }

.process-bar { margin-top: 22px; display: flex; gap: 12px; align-items: center; }
.process-bar .btn-primary { padding: 14px 28px; }
.status { color: var(--muted); font-size: 14px; }
.status.ok { color: var(--green-2); }
.status.err { color: #f87171; }

/* 付费规则 */
.pricing h3 { margin: 0 0 14px; }
.plan {
  background: linear-gradient(160deg, #1a2040, #141a30);
  border: 1px solid var(--border); border-radius: 14px; padding: 18px;
}
.plan .tag { color: var(--muted); font-size: 13px; }
.plan .price { font-size: 30px; font-weight: 800; margin: 6px 0 14px; }
.plan .price small { font-size: 14px; color: var(--muted); font-weight: 500; }
.plan ul { list-style: none; padding: 0; margin: 14px 0 0; color: var(--muted); font-size: 13px; }
.plan li { margin: 8px 0; }
.plan li::before { content: "✔ "; color: var(--green-2); }
.note { color: var(--muted); font-size: 12px; line-height: 1.7; margin-top: 16px; }

/* 充值弹窗 */
.modal-bg {
  position: fixed; inset: 0; background: rgba(0,0,0,.6);
  display: none; place-items: center; z-index: 50;
}
.modal-bg.show { display: grid; }
.modal { width: 360px; text-align: center; }
.qr { width: 200px; height: 200px; margin: 14px auto; border-radius: 12px; background: #fff; display: grid; place-items: center; color: #333; }
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  padding: 12px 22px; border-radius: 10px; opacity: 0; transition: .3s; pointer-events: none;
}
.toast.show { opacity: 1; bottom: 36px; }
.hidden { display: none !important; }