:root {
  color-scheme: light;
  --paper: #ffffff;
  --desk: #eef2f7;
  --ink: #0f2b52;
  --secondary: #46576a;
  --rule: #8b99aa;
  --marker: #a3e635;
  --gutter: clamp(1.1rem, 4vw, 3.5rem);
  --content-width: 58rem;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--desk);
  color: var(--ink);
  font: 1rem/1.65 "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

.sheet {
  max-inline-size: var(--content-width);
  margin: clamp(0rem, 4vw, 3rem) auto;
  padding: var(--gutter);
  background: var(--paper);
  border-block-start: .45rem solid var(--marker);
}

.sheet-heading p { max-inline-size: 37em; }
.byline { margin: 0 0 .45rem; font-weight: 700; }

h1, h2 { margin: 0; line-height: 1.25; }
h1 { font-size: clamp(1.85rem, 5vw, 3rem); font-weight: 800; }
h2 { font-size: 1.25rem; }

.fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem;
  margin-block: 1.75rem;
  border-block: 1px solid var(--rule);
  padding-block: 1.3rem .5rem;
}

dl { margin-block: .75rem; }
dl > div { margin-block-end: .85rem; }
dt { font-weight: 650; }
dd { margin: 0; }
.options { color: var(--secondary); }
.writing-line { min-block-size: 1.85rem; border-block-end: 1px solid var(--rule); }

.review p { max-inline-size: 48em; }
a { color: var(--ink); text-decoration-thickness: .1em; text-underline-offset: .2em; }
a:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; }

footer {
  border-block-start: 1px solid var(--rule);
  margin-block-start: 1.65rem;
  color: var(--secondary);
  font-size: .88rem;
}

@media (max-width: 38rem) {
  .fields { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
}

@media print {
  :root {
    --desk: #ffffff;
    --ink: #161616;
    --secondary: #333333;
    --rule: #666666;
    --marker: #333333;
    --gutter: 0rem;
  }

  @page { size: A4 portrait; margin: 13mm; }
  .sheet { margin: 0; border-block-start-width: 2px; padding-block-start: 7mm; }
  .fields { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fields > section, .review { break-inside: avoid; }
  .print-note { display: none; }
}