:root {
  --orange: #FF6B2B;
  --orange-dark: #E55A1F;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --bg: #fafafa;
  --card: #fff;
  --border: #e5e5e5;
  --error: #d32f2f;
  --success: #2e7d32;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang HK", "Microsoft JhengHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.5;
}
.container { max-width: 640px; margin: 0 auto; padding: 24px 16px; }
header { background: var(--orange); color: #fff; padding: 24px 16px; }
header h1 { margin: 0 0 4px; font-size: 22px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand-logo {
  height: 52px; width: 52px; border-radius: 13px; background: #fff;
  padding: 3px; box-sizing: border-box; flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
}
.brand-text { min-width: 0; }
.brand-text h1, .brand-text p { margin: 0; }
header p { margin: 0; opacity: 0.92; font-size: 13px; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 16px; }
.card h2 { margin: 0 0 12px; font-size: 18px; }
.card h3 { margin: 16px 0 8px; font-size: 15px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }
.muted { color: var(--muted); font-size: 13px; }

.option {
  display: flex; align-items: center; gap: 12px;
  border: 1.5px solid var(--border); border-radius: 10px; padding: 14px;
  margin-bottom: 10px; cursor: pointer; transition: all 0.15s;
}
.option:hover { border-color: var(--orange); background: #fff8f3; }
.option.selected { border-color: var(--orange); background: #fff8f3; box-shadow: 0 0 0 2px rgba(255,107,43,0.15); }
.option .price { font-size: 20px; font-weight: 700; color: var(--orange); min-width: 64px; }
.option .body { flex: 1; }
.option .label { font-weight: 600; font-size: 14px; }
.option .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

input[type=text], input[type=email], input[type=number], textarea {
  width: 100%; padding: 11px 12px; border: 1.5px solid var(--border); border-radius: 8px;
  font-size: 15px; font-family: inherit; box-sizing: border-box;
}
input:focus, textarea:focus { outline: none; border-color: var(--orange); }
label { display: block; margin-bottom: 6px; font-size: 13px; color: var(--muted); }
.form-row { margin-bottom: 14px; }

button.primary, .btn-primary {
  width: 100%; background: var(--orange); color: #fff; border: none;
  padding: 14px; border-radius: 10px; font-size: 16px; font-weight: 600; cursor: pointer;
  transition: background 0.15s;
}
button.primary:hover, .btn-primary:hover { background: var(--orange-dark); }
button.primary:disabled { background: #ccc; cursor: not-allowed; }

button.secondary, .btn-secondary {
  width: 100%; background: #fff; color: var(--text); border: 1.5px solid var(--border);
  padding: 12px; border-radius: 10px; font-size: 15px; cursor: pointer; margin-top: 8px;
}
button.secondary:hover { border-color: var(--orange); color: var(--orange); }

.error { color: var(--error); font-size: 13px; margin-top: 8px; }
.success { color: var(--success); font-size: 13px; margin-top: 8px; }

.checkbox-row { display: flex; align-items: start; gap: 10px; font-size: 13px; color: var(--muted); margin: 14px 0; }
.checkbox-row input { margin-top: 2px; }

.refund-warning {
  background: #fff4ed; border: 1px solid #ffd2b3; border-left: 4px solid var(--orange);
  border-radius: 8px; padding: 12px 14px; margin: 16px 0; font-size: 13px; color: #7a3b14; line-height: 1.6;
}
.refund-warning .refund-en { display: block; margin-top: 4px; font-size: 11px; color: #a06a44; }

footer { text-align: center; padding: 32px 16px; color: var(--muted); font-size: 12px; }
footer a { color: var(--muted); text-decoration: none; }