:root {
  --paper: #f3eee4;
  --ink: #1c1914;
  --muted: #5f584e;
  --line: #ddd4c6;
  --card: #fbf7f0;
  --seal: #9d3428;
  --seal-dark: #7d241b;
  --pine: #1e3d34;
  --focus: #1e3d34;
  color-scheme: light;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
}
a { color: inherit; }
button, input { font: inherit; }
html, body { max-width: 100%; overflow-x: hidden; }
.top, .foot, main {
  width: auto;
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: 16px;
  box-sizing: border-box;
}
.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 16px;
  padding: 22px 16px 8px;
}
.brand {
  font-family: "Iowan Old Style", Palatino, "Songti SC", "Noto Serif SC", serif;
  font-size: 28px;
  letter-spacing: 0.08em;
  text-decoration: none;
}
.top nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px 18px; max-width: 100%; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a[aria-current="page"] { color: var(--ink); border-bottom: 1px solid var(--seal); }
.foot { color: var(--muted); font-size: 13px; padding: 12px 16px 40px; }
.foot a { color: var(--pine); }
.loading, .noscript { padding: 32px 0; }

.hero { padding: 28px 0 12px; display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(180px, 0.55fr); gap: 28px; align-items: end; }
.hero h1, .page-title, .q-text, .code {
  font-family: "Iowan Old Style", Palatino, "Songti SC", "Noto Serif SC", serif;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.hero h1 { font-size: clamp(40px, 6vw, 68px); margin: 0 0 12px; max-width: 12ch; }
.page-title { font-size: clamp(36px, 5vw, 56px); margin: 0 0 8px; }
.lede { font-size: 18px; max-width: 38em; margin: 0 0 18px; }
.row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.cta, .ghost, .choice, .pay-btn {
  border-radius: 999px;
  padding: 12px 18px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.cta, .pay-btn { background: var(--seal); color: #fffaf6; }
.cta:hover, .pay-btn:hover { background: var(--seal-dark); }
.ghost { border-color: var(--line); background: transparent; color: var(--ink); }
.fine { color: var(--muted); font-size: 14px; }
.stat {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 18px;
  padding: 18px;
  min-width: 180px;
}
.stat b { display: block; font-size: 28px; font-family: Palatino, "Songti SC", serif; }
.steps, .type-grid, .group-block { display: grid; gap: 12px; }
.steps { grid-template-columns: repeat(3, 1fr); margin: 28px 0; }
.step, .card, .report article, .pay {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px 18px;
}
.step span { color: var(--seal); font-variant-numeric: tabular-nums; }
h2 { font-size: 22px; margin: 28px 0 10px; }
.group-block { margin-bottom: 18px; }
.group-block h3 { margin: 0; }
.group-block p { margin: 4px 0 0; color: var(--muted); }
.type-grid { grid-template-columns: repeat(4, 1fr); }
.card { text-decoration: none; display: block; min-height: 148px; border-top: 4px solid var(--pine); }
.card[data-group="nt"] { border-top-color: #243044; }
.card[data-group="nf"] { border-top-color: #6d3140; }
.card[data-group="sj"] { border-top-color: #234237; }
.card[data-group="sp"] { border-top-color: #8a5424; }
.card strong { display: block; font-size: 18px; letter-spacing: 0.04em; }
.card em { font-style: normal; color: var(--muted); }
.progress {
  height: 6px;
  background: var(--line);
  border-radius: 99px;
  overflow: hidden;
  margin: 18px 0;
}
.progress span { display: block; height: 100%; background: var(--pine); }
.q-text { font-size: clamp(26px, 4vw, 40px); margin: 8px 0 18px; overflow-wrap: anywhere; }
.scale { display: flex; width: 100%; max-width: 100%; gap: 6px; }
.scale > .choice {
  flex: 1 1 0;
  width: 0;
  min-width: 0;
  max-width: none;
  min-height: 48px;
  padding: 10px 0;
  border-color: var(--line);
  background: var(--card);
  color: var(--ink);
}
.choice[aria-pressed="true"] { background: var(--pine); color: white; border-color: var(--pine); }
.ends { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.code { font-size: clamp(48px, 8vw, 84px); margin: 0; }
.bars { display: grid; gap: 12px; margin: 18px 0; }
.bar-head { display: flex; justify-content: space-between; font-size: 14px; }
.track { height: 8px; background: #e6dfd3; border-radius: 99px; }
.track span { display: block; height: 100%; background: var(--pine); border-radius: inherit; }
.pay { margin-top: 16px; }
.channels { display: grid; gap: 8px; margin: 12px 0; }
.channel {
  text-align: left;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
}
.channel[aria-pressed="true"] { border-color: var(--pine); background: #e7efe9; }
.channel small { display: block; color: var(--muted); }
.report { display: grid; gap: 12px; }
.report h3 { margin: 0 0 6px; }
.error { color: var(--seal-dark); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.step h2 { margin: 6px 0; font-size: 20px; }
@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; }
  .steps, .type-grid { grid-template-columns: 1fr 1fr; }
  .top { align-items: flex-start; }
}
@media (max-width: 560px) {
  .type-grid, .steps { grid-template-columns: 1fr; }
  .top nav { gap: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}