:root { color-scheme: light; font-family: system-ui, "Microsoft YaHei", sans-serif; color: #1c2837; background: #f4f6f8; }
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 1000px; margin: 0 auto; padding: 40px 24px; }
h1 { margin: 8px 0 16px; font-size: 32px; }
h2 { font-size: 20px; margin: 0 0 20px; }
p { line-height: 1.8; }
.eyebrow { color: #315eac; font-weight: 600; }
.notice, section { padding: 24px; border: 1px solid #d8dfe8; border-radius: 12px; background: white; }
section { margin-top: 24px; }
label { display: block; margin: 16px 0 8px; font-weight: 600; }
input { max-width: 100%; font: inherit; padding: 8px; }
input[type="number"] { width: 180px; border: 1px solid #8593a5; border-radius: 4px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 12px; }
button { font: inherit; padding: 12px 16px; border: 1px solid #8593a5; border-radius: 8px; background: white; cursor: pointer; }
#process, #download { background: #2457a7; color: white; border-color: #2457a7; }
button:disabled { opacity: .45; cursor: default; }
:focus-visible { outline: 3px solid #2457a7; outline-offset: 4px; }
.previews { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
figure { margin: 0; min-width: 0; padding: 16px; background: #f4f6f8; border-radius: 8px; }
figcaption { margin-bottom: 12px; font-weight: 600; }
img { display: block; max-width: 100%; max-height: 360px; object-fit: contain; background: repeating-conic-gradient(#e0e4e8 0% 25%, white 0% 50%) 0 / 16px 16px; }
img[hidden] { display: none; }
.footnote { color: #536174; font-size: 14px; }
@media (max-width: 600px) { main { padding: 24px 16px; } section, .notice { padding: 16px; } .previews { grid-template-columns: 1fr; } }