:root {
  --amber: #b45309;
  --amber-dark: #92400e;
  --ink: #3a2e22;
  --muted: #786c5e;
  --paper: #faf8f5;
  --line: #e7d9c4;
  --alipay: #1677ff;
  --alipay-dark: #0958d9;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: radial-gradient(circle at 50% 0, #fffdf8, var(--paper) 42%); font-family: system-ui, "Noto Sans SC", sans-serif; line-height: 1.6; }
.wrap { max-width: 620px; margin: 0 auto; padding: 28px 18px 60px; }
.brand { color: var(--amber); font-size: 14px; text-decoration: none; }
h1 { margin: 8px 0 2px; color: var(--amber); font: 600 29px/1.4 "Noto Serif SC", serif; }
h2 { margin: 0 0 12px; color: var(--amber); font: 600 19px/1.4 "Noto Serif SC", serif; }
.sub { margin: 0 0 20px; color: var(--muted); font-size: 14px; }
a { color: var(--amber); }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 0 0 16px; padding: 0; list-style: none; }
.steps li { display: flex; align-items: center; justify-content: center; gap: 7px; padding: 9px 5px; border: 1px solid var(--line); border-radius: 11px; color: var(--muted); background: rgb(255 255 255 / 72%); font-size: 12px; }
.steps b { display: grid; width: 21px; height: 21px; place-items: center; border-radius: 50%; color: #fff; background: var(--amber); font-size: 11px; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; margin-bottom: 12px; padding: 5px; border: 1px solid var(--line); border-radius: 13px; background: #f2ebe1; }
.tab { padding: 10px 8px; border: 0; border-radius: 9px; color: var(--muted); background: transparent; font: inherit; font-size: 14px; cursor: pointer; }
.tab.active { color: var(--amber-dark); background: #fff; box-shadow: 0 2px 8px rgb(91 63 32 / 8%); font-weight: 650; }

.card { margin-bottom: 16px; padding: 20px; border: 1px solid var(--line); border-radius: 17px; background: #fff; box-shadow: 0 4px 18px rgb(91 63 32 / 6%); }
.tip { padding: 12px 14px; border-radius: 10px; color: var(--amber-dark); background: #fff7ed; font-size: 13px; }
.editions { margin-top: 14px; }
.edition { padding: 14px; border: 1.5px solid var(--amber); border-radius: 12px; background: #fffaf3; text-align: center; }
.edition-name { font-weight: 650; }
.edition-price { margin: 2px 0; color: var(--amber); font-size: 24px; font-weight: 750; }
.edition-origin { margin-left: 8px; color: var(--muted); font-size: 13px; font-weight: 400; text-decoration: line-through; }
.edition-detail { color: var(--muted); font-size: 12px; }
label:not(.consent) { display: block; margin: 14px 0 6px; color: var(--muted); font-size: 13px; }
input[type="text"], input[type="email"] { width: 100%; padding: 12px; border: 1px solid var(--line); border-radius: 10px; color: var(--ink); background: #fffdfb; font-size: 16px; }
input:focus { border-color: var(--amber); outline: 2px solid rgb(180 83 9 / 12%); }
.consent { display: flex; gap: 8px; align-items: flex-start; margin-top: 16px; color: var(--muted); font-size: 12px; }
.consent input { width: 18px; height: 18px; margin: 1px 0 0; accent-color: var(--amber); }
.hint, .recovery-note { margin: 7px 0 0; color: var(--muted); font-size: 12.5px; }
.recovery-note { margin-bottom: 14px; padding: 11px 13px; border-radius: 9px; background: #fffaf3; }
.error { min-height: 20px; margin-top: 8px; color: #b42318; font-size: 13px; }
.success { color: #256a3d; font-size: 13px; }
.row { display: flex; justify-content: space-between; gap: 14px; margin: 7px 0; font-size: 14px; }
.row b { overflow-wrap: anywhere; text-align: right; }
.price { color: var(--amber); }

.button { display: block; width: 100%; margin-top: 16px; padding: 13px; border: 0; border-radius: 999px; color: #fff; background: var(--amber); font-size: 16px; font-weight: 650; cursor: pointer; text-align: center; text-decoration: none; }
.button.alipay { background: var(--alipay); box-shadow: 0 7px 18px rgb(22 119 255 / 22%); }
.button.alipay:hover { background: var(--alipay-dark); }
.button:disabled { cursor: default; opacity: .55; }
.button.secondary { margin-top: 0; border: 1.5px solid var(--amber); color: var(--amber); background: #fff; }
.button-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 14px 0; }
.text-button { padding: 4px 0; border: 0; color: var(--amber); background: transparent; font: inherit; font-size: 12px; cursor: pointer; }
.code { margin: 12px 0; padding: 14px; border: 1px dashed var(--amber); border-radius: 10px; background: #fff7ed; font: 13px/1.6 ui-monospace, Consolas, monospace; overflow-wrap: anywhere; }

.support { color: var(--muted); font-size: 12px; text-align: center; }
.hidden { display: none !important; }

@media (max-width: 480px) {
  .wrap { padding: 22px 14px 44px; }
  .card { padding: 16px; border-radius: 14px; }
  .steps li { flex-direction: column; gap: 3px; }
  .button-row { grid-template-columns: 1fr; }
}
.benefit-kicker { margin: 0 0 6px; color: var(--amber); font-size: 12px; letter-spacing: .08em; }
.benefit-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin: 18px 0; }
.benefit-grid article { padding: 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--paper); }
.benefit-grid h3 { margin: 0 0 6px; color: var(--amber-dark); font-size: 15px; }
.benefit-grid p, .purchase-scope { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.purchase-scope { border-top: 1px solid var(--line); padding-top: 15px; }
@media (max-width: 380px) { .benefit-grid { grid-template-columns: 1fr; } }