:root {
  color-scheme: light;
  --paper: #f5f1eb;
  --surface: #fffdfa;
  --ink: #27222a;
  --muted: #706a70;
  --rule: #d8d0c9;
  --accent: #b34d3e;
  --accent-dark: #913b30;
  --purple: #6d5b78;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { background: var(--paper); }
body { margin: 0; color: var(--ink); background: var(--paper); }
button, textarea, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
button:focus-visible, a:focus-visible, textarea:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }

.site-shell { width: min(1200px, calc(100% - 72px)); margin: 0 auto; min-height: 100vh; display: flex; flex-direction: column; }
.site-header { height: 94px; border-bottom: 1px solid var(--ink); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.wordmark { display: flex; align-items: center; gap: 16px; text-decoration: none; font-size: 10px; letter-spacing: .24em; white-space: nowrap; }
.mark { font-size: 28px; letter-spacing: -.13em; font-weight: 500; }
.mark span { color: var(--accent); padding: 0 2px; }
.header-note { color: var(--muted); font-size: 12px; letter-spacing: .06em; text-align: right; }
.note-star { color: var(--accent); font-size: 16px; margin: 0 4px; }
main { flex: 1; }
.eyebrow { display: flex; align-items: center; gap: 12px; color: var(--accent); font-size: 11px; letter-spacing: .22em; }
.eyebrow-line { width: 30px; height: 1px; background: var(--accent); }
.hero { padding: 100px 0 92px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: clamp(48px, 10vw, 150px); align-items: end; }
h1 { margin: 31px 0 26px; font-size: clamp(58px, 7.6vw, 112px); line-height: 1.07; letter-spacing: -.08em; font-weight: 500; }
h1 em { color: var(--accent); font-style: normal; }
.hero-copy, .claim-intro > p { max-width: 610px; font-size: 16px; line-height: 2; color: #4e4850; }
.hero-copy { margin: 0 0 34px; }
.primary-button { min-height: 53px; min-width: 224px; border: 1px solid var(--accent); border-radius: 2px; background: var(--accent); color: #fffdfa; display: inline-flex; justify-content: space-between; align-items: center; gap: 32px; padding: 13px 20px; cursor: pointer; text-decoration: none; font-size: 14px; transition: background .18s, transform .18s; }
.primary-button:hover:not(:disabled):not(.disabled) { background: var(--accent-dark); transform: translateY(-2px); }
.primary-button:disabled, .primary-button.disabled { opacity: .5; cursor: not-allowed; pointer-events: none; }
.message { min-height: 28px; margin: 16px 0 0; color: var(--purple); font-size: 13px; line-height: 1.7; }
.message[data-kind="error"] { color: var(--accent-dark); }
.hero-aside { padding: 0 0 10px; }
.aside-rule { width: 100%; height: 1px; background: var(--ink); }
.aside-kicker, .section-index, .step-caption { font-size: 10px; letter-spacing: .18em; color: var(--purple); }
.aside-kicker { margin: 16px 0 26px; }
.flow-list { list-style: none; padding: 0; margin: 0; }
.flow-list li { display: flex; gap: 19px; border-top: 1px solid var(--rule); padding: 21px 0; }
.flow-list li:last-child { border-bottom: 1px solid var(--rule); }
.flow-list li > span { font-size: 12px; color: var(--accent); }
.flow-list strong { display: block; font-size: 15px; font-weight: 500; margin-bottom: 7px; }
.flow-list small { display: block; color: var(--muted); font-size: 12px; line-height: 1.6; }
.created-panel, .result-panel { border: 1px solid var(--ink); background: var(--surface); padding: 30px 36px 36px; box-shadow: 8px 8px 0 #ded5cf; }
.created-panel { margin-bottom: 72px; }
.panel-heading { display: flex; gap: 24px; align-items: baseline; border-bottom: 1px solid var(--rule); padding-bottom: 18px; }
.panel-heading h2 { margin: 0; font-weight: 500; font-size: 29px; letter-spacing: -.04em; }
.created-panel > p, .result-panel > p { color: var(--muted); font-size: 14px; line-height: 1.8; }
.link-row { display: flex; gap: 9px; margin: 22px 0; }
.link-row input { min-width: 0; flex: 1; border: 1px solid var(--rule); background: var(--paper); padding: 12px 14px; color: var(--ink); font-size: 13px; }
.secondary-button { min-width: 80px; border: 1px solid var(--ink); border-radius: 2px; background: transparent; padding: 10px 16px; cursor: pointer; }
.secondary-button:hover { background: var(--ink); color: white; }
.text-link { display: inline-flex; gap: 12px; text-decoration: none; color: var(--accent); border-bottom: 1px solid var(--accent); padding-bottom: 4px; font-size: 14px; }
.fine-print, .help-line { display: flex; gap: 32px; border-top: 1px solid var(--rule); padding: 26px 0; }
.fine-print p, .help-line p { max-width: 690px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.site-footer { border-top: 1px solid var(--ink); min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; color: var(--muted); font-size: 10px; letter-spacing: .13em; }

.claim-intro { padding: 75px 0 48px; }
.claim-intro h1 { margin: 26px 0 20px; font-size: clamp(54px, 6.2vw, 86px); }
.claim-intro > p { margin: 0; max-width: 760px; }
code { font-family: ui-monospace, Consolas, monospace; overflow-wrap: anywhere; font-size: .89em; }
.claim-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.step-card { background: var(--surface); border: 1px solid var(--rule); min-height: 340px; padding: 30px 32px; }
.step-top { display: flex; align-items: baseline; justify-content: space-between; border-bottom: 1px solid var(--ink); padding-bottom: 14px; }
.step-number { color: var(--accent); font-size: 34px; line-height: 1; font-family: Georgia, serif; }
.step-card h2 { font-size: 25px; font-weight: 500; letter-spacing: -.04em; margin: 28px 0 8px; }
.step-card p { color: var(--muted); font-size: 13px; line-height: 1.8; min-height: 47px; margin: 0 0 18px; }
.step-card label { display: block; font-size: 12px; margin-bottom: 9px; }
.step-card textarea { width: 100%; resize: vertical; min-height: 75px; border: 1px solid var(--rule); border-radius: 2px; background: var(--paper); padding: 12px; font-size: 12px; line-height: 1.5; color: var(--ink); }
.step-card form .primary-button { margin-top: 15px; }
.claim-message { margin: 24px 0 30px; }
.result-panel { margin: 16px 0 50px; }
.wallet-block { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); display: flex; align-items: baseline; gap: 22px; padding: 20px 0; margin: 20px 0; flex-wrap: wrap; }
.wallet-label { color: var(--muted); font-size: 13px; }
.wallet-block strong { font-size: 24px; font-weight: 500; }
.bonus-list h3 { font-size: 14px; font-weight: 500; margin: 0 0 10px; }
.bonus-list p { font-size: 13px; margin: 0 0 8px; }
.result-note { margin-bottom: 0; }
.help-line { margin: 10px 0 44px; }
.help-line a { color: var(--accent); text-underline-offset: 3px; }

@media (max-width: 800px) {
  .site-shell { width: min(100% - 36px, 600px); }
  .site-header { height: 74px; }
  .header-note { display: none; }
  .hero { padding: 70px 0 54px; }
  .hero-grid, .claim-layout { grid-template-columns: 1fr; gap: 40px; }
  .hero-aside { max-width: 420px; }
  .claim-intro { padding: 60px 0 38px; }
  .claim-layout { gap: 16px; }
  .step-card { min-height: 0; padding: 24px; }
  .step-card p { min-height: 0; }
  .created-panel, .result-panel { padding: 24px 20px; box-shadow: 5px 5px 0 #ded5cf; }
  .panel-heading { display: block; }
  .panel-heading h2 { margin-top: 10px; }
  .fine-print, .help-line { display: block; }
  .fine-print p, .help-line p { margin-top: 10px; }
  .site-footer { display: block; padding: 18px 0; line-height: 2; }
}

@media (prefers-reduced-motion: reduce) {
  .primary-button { transition: none; }
}