* { box-sizing: border-box; }
body { margin: 0; background: #f5f7fa; color: #263445; font: 16px/1.7 "Microsoft YaHei", sans-serif; }
header { padding: 20px max(24px, calc((100% - 1000px)/2)); display: flex; justify-content: space-between; gap: 20px; background: white; border-bottom: 1px solid #e4eaf1; }
a { color: #246bd6; text-decoration: none; }
main { max-width: 720px; margin: 40px auto; padding: 36px; background: white; border: 1px solid #e4eaf1; border-radius: 8px; }
h1 { margin: 0 0 12px; font-size: 28px; } h2 { font-size: 22px; }
.intro { color: #64748b; } aside { padding: 16px; background: #eef5ff; border-left: 4px solid #246bd6; margin: 24px 0; }
label { display: block; margin: 20px 0 8px; } input, button { font: inherit; border-radius: 4px; padding: 11px 14px; }
input { width: 100%; min-width: 0; border: 1px solid #cbd5e1; background: #fff; }
button { border: 0; background: #246bd6; color: white; cursor: pointer; } button:disabled { opacity: .6; cursor: default; }
input:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid #79abf5; outline-offset: 2px; }
.row { display: flex; gap: 12px; } .row button { flex-shrink: 0; }
.options { list-style: none; padding: 0; border: 1px solid #cbd5e1; max-height: 240px; overflow: auto; }
.options button { display: block; width: 100%; text-align: left; color: #263445; background: white; border-bottom: 1px solid #e4eaf1; }
.options button:hover { background: #eef5ff; } .selected { color: #246bd6; } .message { color: #b42318; } .submit { width: 100%; margin-top: 28px; }
.success { padding: 12px 0; } [v-cloak] { display: none; }
@media(max-width: 600px) { main { margin: 16px; padding: 22px; } header { padding: 16px; font-size: 14px; } h1 { font-size: 24px; } .row { gap: 8px; } .row button { padding: 10px; font-size: 14px; } }