:root { --accent: hsl(101 48% 36%); --tint: hsl(101 58% 96%); --ink: #172033; --line: #d9e1ec; }
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: #f7f9fc; font: 16px/1.7 system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.shell, main, .site-footer { width: min(960px, calc(100% - 32px)); margin: 0 auto; }
.site-header { background: #fff; border-bottom: 1px solid var(--line); }
.site-header .shell { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 68px; }
.brand { color: var(--ink); font-weight: 760; text-decoration: none; overflow-wrap: anywhere; }
nav { display: flex; gap: 16px; flex-wrap: wrap; }
main { padding: 34px 0; }
section, aside { margin: 0 0 24px; padding: 26px; background: #fff; border: 1px solid var(--line); border-radius: 18px; }
.hero { background: var(--tint); }
.eyebrow { margin: 0; color: var(--accent); font-size: .875rem; font-weight: 700; letter-spacing: .08em; }
h1, h2 { line-height: 1.25; }
h1 { margin: .35rem 0 1rem; font-size: clamp(2rem, 6vw, 3.4rem); }
h2 { margin-top: 0; font-size: 1.35rem; }
.topic-visual { margin: 24px 0 0; }
img { display: block; width: 100%; height: auto; border-radius: 14px; background: #edf2f7; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .7rem; border: 1px solid var(--line); text-align: left; }
details { padding: .7rem 0; }
.site-footer { padding: 26px 0 40px; color: #526074; }
@media (max-width: 620px) { .site-header .shell { align-items: flex-start; flex-direction: column; padding: 14px 0; } section, aside { padding: 20px; } }