:root {
  --ink: #15241f;
  --muted: #5a6d66;
  --accent: #0d6e63;
  --accent-2: #0a544c;
  --line: rgba(21, 36, 31, 0.12);
  --danger: #b42318;
  --ok: #0d6e63;
  --font-display: "DM Serif Display", "Songti SC", Georgia, serif;
  --font-body: "Outfit", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 12% -8%, rgba(13, 110, 99, 0.16), transparent 55%),
    linear-gradient(165deg, #edf1f0, #dfe8e5);
  line-height: 1.5;
}

.wrap {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 calc(3rem + env(safe-area-inset-bottom, 0px));
}

@media (max-width: 640px) {
  .wrap {
    width: min(100%, calc(100% - 1.2rem));
    padding-top: 1.4rem;
  }
  .brand { font-size: 2.4rem; }
  h1 { font-size: 1.5rem; }
  .card { padding: 1rem; border-radius: 16px; }
  .btn, .btn.primary {
    width: 100%;
    min-height: 46px;
    justify-content: center;
  }
  .actions { display: grid; grid-template-columns: 1fr; }
  .agreement-box { max-height: 45vh; }
  input { font-size: 16px; }
  .steps li { min-width: 100%; }
}

.head { margin-bottom: 1.25rem; }
.brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: 3rem;
  line-height: 0.95;
  color: var(--accent);
}
h1 {
  margin: 0.2rem 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.9rem;
}
.sub { margin: 0; color: var(--muted); }

.card {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 40px rgba(21, 36, 31, 0.08);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card h2 {
  margin: 0.2rem 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.25rem;
}

.card h2:not(:first-child) {
  margin-top: 1.25rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
}

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.9rem;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f7faf8;
  padding: 0.7rem 0.8rem;
  font: inherit;
}

input:focus {
  outline: 2px solid rgba(13, 110, 99, 0.28);
  border-color: rgba(13, 110, 99, 0.4);
}

.tip {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.btn.primary {
  border: 0;
  background: linear-gradient(180deg, #128577, var(--accent-2));
  color: #f4fffc;
  box-shadow: 0 10px 24px rgba(13, 110, 99, 0.25);
}

.errors {
  border-color: rgba(180, 35, 24, 0.28);
  background: rgba(180, 35, 24, 0.06);
  color: var(--danger);
}

.errors ul { margin: 0.4rem 0 0; padding-left: 1.1rem; }

.ok {
  font-weight: 700;
  color: var(--ok);
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

.steps {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0 0 1rem;
}

.steps li {
  flex: 1;
  min-width: 140px;
  text-align: center;
  padding: 0.55rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 600;
}

.steps li.is-active {
  border-color: rgba(13, 110, 99, 0.35);
  background: rgba(13, 110, 99, 0.12);
  color: var(--accent-2);
}

.steps li.is-done {
  border-color: rgba(13, 110, 99, 0.2);
  color: var(--accent);
}

.agreement-box {
  max-height: 320px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f7faf8;
  padding: 0.9rem 1rem;
  margin-bottom: 0.9rem;
}

.agreement-box-sm {
  max-height: 180px;
}

.agreement-box pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.65;
  color: #243832;
}

.agree-check {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
}

.agree-check input {
  width: auto;
  margin-top: 0.2rem;
  accent-color: var(--accent);
}

.btn:disabled,
.btn.primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
  filter: none;
}