:root { color-scheme: light; --ink: #17292c; --muted: #5b686b; --line: #dce3e2; --accent: #185e58; }
* { box-sizing: border-box; }
body { margin: 0; background: #f6f8f7; color: var(--ink); font-family: "PingFang SC", "Hiragino Sans GB", sans-serif; font-size: 16px; line-height: 1.85; }
a { color: var(--accent); text-underline-offset: .24em; overflow-wrap: anywhere; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.skip { position: absolute; top: -100px; left: 16px; background: white; padding: 8px 16px; }
.skip:focus { top: 8px; }
header, main, footer { width: min(100% - 48px, 800px); margin-inline: auto; }
header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); font-weight: 650; white-space: nowrap; }
.brand img { width: 38px; height: 38px; border-radius: 10px; }
nav { display: flex; flex-wrap: wrap; gap: 20px; font-size: 14px; }
nav a { text-decoration: none; }
nav a[aria-current="page"] { text-decoration: underline; }
main { min-height: 54vh; padding-block: 52px 64px; }
h1 { margin: 0 0 18px; font-family: "Songti SC", "STSong", serif; font-weight: 600; font-size: clamp(32px, 6vw, 46px); line-height: 1.35; letter-spacing: .02em; }
h2 { font-size: 21px; margin: 42px 0 12px; line-height: 1.5; }
h3 { font-size: 17px; margin: 28px 0 8px; }
p, ul, ol { margin-block: 12px; }
li + li { margin-top: 8px; }
ul, ol { padding-left: 1.5em; }
.eyebrow, .meta { color: var(--muted); font-size: 14px; }
.eyebrow { letter-spacing: .1em; font-weight: 600; margin-bottom: 12px; }
.lead { max-width: 38em; font-size: 19px; color: #364b4e; }
.note { border-left: 3px solid #72a59e; padding: 14px 20px; background: #eaf1ee; margin-block: 26px; }
.links { display: flex; gap: 12px; flex-wrap: wrap; margin-block: 30px; }
.links a { padding: 10px 18px; border: 1px solid #a9bdb7; border-radius: 6px; text-decoration: none; }
section { scroll-margin-top: 24px; }
details { border-top: 1px solid var(--line); padding: 18px 0; }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 600; }
footer { border-top: 1px solid var(--line); padding-block: 24px 36px; color: var(--muted); font-size: 13px; }
footer p { margin: 6px 0; }
@media (max-width: 540px) { header, main, footer { width: calc(100% - 36px); } header { align-items: flex-start; flex-direction: column; gap: 14px; padding-block: 22px; } main { padding-top: 34px; } nav { gap: 22px; } .lead { font-size: 18px; } }
@media print { body { background: white; } header, footer, .skip { display: none; } main { width: 100%; padding: 0; } details { break-inside: avoid; } }