:root {
  --primary: #1677ff; --primary-dark: #0d63e8; --primary-light: #e8f2ff;
  --cyan: #00b8d9; --green: #12a67a; --red: #f04438; --gold: #ffb020;
  --bg: #f2f8ff; --card: #fff; --border: #e6f1ff; --text: #1b4d80; --muted: #6b9bc9;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: radial-gradient(900px 500px at 15% 0%, #dceeff 0%, transparent 55%),
              radial-gradient(900px 600px at 100% 100%, #e8f7ff 0%, transparent 55%), var(--bg);
  color: var(--text); font-size: 14px; -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
.install-wrap { max-width: 960px; margin: 0 auto; padding: 40px 20px 60px; }
.install-head { text-align: center; margin-bottom: 26px; }
.install-logo {
  width: 58px; height: 58px; border-radius: 18px; margin: 0 auto 14px;
  background: linear-gradient(135deg, #1677ff, #56b7ff); color: #fff; font-size: 24px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; box-shadow: 0 12px 30px rgba(22,119,255,.3);
}
.install-head h1 { margin: 0; font-size: 26px; letter-spacing: .5px; }
.install-head p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.steps { display: flex; align-items: center; justify-content: center; gap: 6px; margin: 22px 0 24px; flex-wrap: wrap; }
.step { display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: #8fb2d4; padding: 6px 10px; border-radius: 20px; }
.step b {
  width: 22px; height: 22px; border-radius: 50%; background: #e8f2ff; color: #4a83b3;
  display: inline-flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 600;
}
.step.active { color: var(--primary); background: #fff; box-shadow: 0 6px 16px rgba(22,119,255,.12); }
.step.active b { background: var(--primary); color: #fff; }
.step.done { color: var(--green); }
.step.done b { background: #e7f8f2; color: var(--green); }
.step-sep { color: #c9def5; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 20px;
  box-shadow: 0 18px 50px rgba(20, 80, 140, .10); padding: 28px 30px;
}
.card h2 { margin: 0 0 6px; font-size: 20px; color: #174a78; }
.card .desc { color: var(--muted); font-size: 13px; margin-bottom: 20px; line-height: 1.8; }
.check-list { border: 1px solid var(--border); border-radius: 14px; overflow: hidden; margin-bottom: 20px; }
.check-item { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid #f2f8ff; font-size: 13px; }
.check-item:last-child { border-bottom: none; }
.check-item .name { flex: 1; color: #2c5f8a; }
.check-item .val { color: var(--muted); font-size: 12px; }
.check-ok { color: var(--green); font-weight: 600; }
.check-fail { color: var(--red); font-weight: 600; }
.badge { display: inline-flex; padding: 2px 9px; border-radius: 20px; font-size: 11.5px; }
.badge-ok { background: #e7f8f2; color: #0b8f68; }
.badge-fail { background: #ffecea; color: #cf2f21; }
.badge-info { background: #e8f2ff; color: #1668d4; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: 12.5px; color: var(--muted); }
.field label b { color: var(--red); }
.input {
  height: 42px; border: 1px solid var(--border); border-radius: 11px; background: #fff;
  padding: 0 13px; font-size: 13.5px; color: var(--text); outline: none;
}
.input:focus { border-color: #8ec4ff; box-shadow: 0 0 0 3px rgba(22,119,255,.1); }
.hint { font-size: 11.5px; color: #9db9d6; }
.alert { border-radius: 12px; padding: 12px 14px; font-size: 13px; margin-bottom: 18px; }
.alert-error { background: #fff0ee; color: #c0392b; border: 1px solid #ffd6d0; }
.alert-success { background: #e9f8f2; color: #0b8f68; border: 1px solid #c8efe0; }
.alert-info { background: #eef6ff; color: #2a6da8; border: 1px solid #d7e9ff; }
.actions { display: flex; gap: 12px; align-items: center; margin-top: 22px; flex-wrap: wrap; }
.actions .spacer { flex: 1; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px; height: 42px;
  padding: 0 24px; border-radius: 11px; border: 1px solid var(--border); background: #fff;
  color: #29689e; font-size: 14px; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: #bfe0ff; color: var(--primary-dark); }
.btn-primary { background: linear-gradient(135deg, #1677ff, #3d95ff); border-color: transparent; color: #fff; box-shadow: 0 10px 22px rgba(22,119,255,.26); }
.btn-primary:hover { color: #fff; background: linear-gradient(135deg, #0d63e8, #2f8cff); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.checkbox { display: flex; align-items: center; gap: 8px; font-size: 13px; color: #2c5f8a; }
.checkbox input { width: 16px; height: 16px; }
.success-card { text-align: center; padding: 40px 30px; }
.success-icon {
  width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 18px;
  background: #e7f8f2; color: var(--green); font-size: 34px; display: flex; align-items: center; justify-content: center;
}
.link-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 24px 0 6px; }
.link-card {
  border: 1px solid var(--border); border-radius: 14px; padding: 16px; text-align: left; background: #fbfdff;
}
.link-card .t { font-weight: 600; color: #245d8d; margin-bottom: 5px; }
.link-card .u { color: var(--muted); font-size: 12.5px; word-break: break-all; }
.footer { text-align: center; color: #a5c4e2; font-size: 11.5px; margin-top: 18px; }
@media (max-width: 640px) {
  .install-wrap { padding: 24px 14px 40px; }
  .card { padding: 20px 18px; border-radius: 16px; }
  .form-grid { grid-template-columns: 1fr; }
  .link-grid { grid-template-columns: 1fr; }
  .install-head h1 { font-size: 21px; }
}