:root {
  --primary: #536DFF;
  --primary-dark: #3E52D9;
  --primary-soft: #EDF0FF;
  --brand: #DC5A22;
  --brand-dark: #B24A1C;
  --ink: #202938;
  --ink-2: #48546A;
  --ink-3: #78839A;
  --line: #E5E8EE;
  --bg: #FFFFFF;
  --inset: #F7F8FA;
  --white: #fff;
  --ok: #2F8A68;
  --danger: #C8483D;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.6 "Inter", "Manrope", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}
.wrap { max-width: 780px; margin: 0 auto; padding: 32px 20px 48px; }
.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.brand small { display: block; font-size: 10px; font-weight: 500; color: var(--ink-3); letter-spacing: 1.6px; }
.brand-wordmark { width: 124px; height: auto; display: block; }
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: 16px;
  padding: 28px; box-shadow: 0 1px 2px rgba(32, 41, 56, .04), 0 16px 40px rgba(32, 41, 56, .05);
}
h1 { font-size: 24px; margin: 0 0 8px; }
.lead { color: var(--ink-2); margin: 0 0 22px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 26px; }
.steps > div {
  border: 1px solid var(--line); border-radius: 12px; padding: 14px;
  background: var(--inset); display: flex; flex-direction: column; gap: 4px;
}
.steps small { color: var(--ink-2); font-size: 12px; }
.step-no {
  width: 22px; height: 22px; border-radius: 50%; background: var(--primary); color: #fff;
  display: grid; place-items: center; font-size: 12px; font-weight: 700; margin-bottom: 4px;
}
.group-title { font-size: 15px; margin: 26px 0 12px; padding-left: 10px; border-left: 3px solid var(--primary); }
.group-title:first-of-type { margin-top: 8px; }
.hint { color: var(--ink-2); font-size: 12.5px; margin: -4px 0 14px; }
.hint code { background: #EEF1F6; padding: 1px 5px; border-radius: 4px; font-size: 12px; }
.badge { font-size: 11px; padding: 2px 8px; border-radius: 999px; font-weight: 500; }
.badge.muted { background: #EEF1F6; color: var(--ink-2); }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--ink-2); }
label.full { grid-column: 1 / -1; }
.req { color: var(--danger); }
input, select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 9px;
  font: inherit; color: var(--ink); background: #fff; outline: none;
}
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.row { display: flex; gap: 10px; margin-top: 24px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border: 1px solid var(--line); border-radius: 9px;
  background: #fff; color: var(--ink); font: inherit; font-weight: 500;
  text-decoration: none; cursor: pointer;
}
.btn:hover { border-color: var(--ink-3); color: var(--ink); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.msg { color: var(--danger); min-height: 20px; margin: 14px 0 0; font-size: 13px; }
.foot { text-align: center; color: var(--ink-2); font-size: 12px; margin-top: 22px; }
.foot a { color: var(--primary); text-decoration: none; }
.result { text-align: center; padding: 16px 0; }
.result h2 { font-size: 20px; margin: 8px 0; }
.result .kv {
  display: inline-block; text-align: left; background: var(--primary-soft); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px 18px; margin: 14px 0 20px; font-size: 13px;
}
.result .kv b { display: inline-block; min-width: 76px; color: var(--ink-2); font-weight: 500; }
.guide-steps { list-style: none; margin: 14px 0 6px; padding: 0; display: grid; gap: 10px; }
.guide-steps li { border: 1px solid var(--line); border-left: 3px solid var(--primary); border-radius: 10px; padding: 11px 13px; background: var(--bg); }
.guide-steps b { display: block; color: var(--ink); font-size: 13.5px; margin-bottom: 3px; }
.guide-steps span { color: var(--ink-2); font-size: 12.5px; line-height: 1.6; }
.ok-row .kv { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; background: var(--primary-soft); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin-bottom: 8px; font-size: 13px; }
.ok-row .kv b { display: block; color: var(--ink-2); font-size: 12px; font-weight: 500; margin-bottom: 2px; }
details#advanced { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin: 18px 0 4px; background: var(--bg); }
details#advanced > summary { cursor: pointer; color: var(--ink-2); font-size: 13.5px; font-weight: 600; }
details#advanced[open] { padding-bottom: 18px; }
@media (max-width: 620px) {
  .card { padding: 20px; }
  .grid, .steps { grid-template-columns: 1fr; }
  .ok-row .kv { grid-template-columns: 1fr; }
}