:root{color-scheme:light;--paper:#f7f5ef;--ink:#24372f;--muted:#57685f;--green:#2f654a;--light:#e4eee5;--line:#ccd7ca;--warm:#fcf0d6;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;font-size:20px}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.75}a{color:var(--green);text-underline-offset:4px}a:hover{color:#143b27}.skip{position:fixed;top:-90px;background:#fff;z-index:50;padding:12px}.skip:focus{top:10px}
.topbar{max-width:1100px;margin:auto;padding:22px 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:.85rem;border-bottom:1px solid var(--line)}
.topbar a{min-height:48px;display:inline-flex;align-items:center}
main{max-width:1100px;margin:auto;padding:0 28px 60px}
.hero{padding:48px 0 20px}h1{font-size:clamp(2.2rem,6vw,3.4rem);line-height:1.25;letter-spacing:.04em;margin:0 0 .6em}
.eyebrow{text-transform:uppercase;font-size:.8rem;letter-spacing:.12em;color:var(--green);font-weight:700}
.lead{max-width:42rem;color:var(--muted);font-size:1.05rem}
.jump{display:flex;flex-wrap:wrap;gap:12px;padding:12px 0 28px}
.jump a{min-height:48px;display:inline-flex;align-items:center;padding:8px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;text-decoration:none}
.book-block{margin:20px 0 48px}h2{font-size:1.45rem}
.chapter-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.chapter-card{display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 18px 16px;text-decoration:none;color:inherit;min-height:148px}
.chapter-card:hover{border-color:var(--green);background:#edf4ed}
.chapter-card .num{color:var(--green);font-size:.8rem;font-weight:700}
.chapter-card h3{margin:0;font-size:1.05rem;line-height:1.45}
.chapter-card p{margin:0;font-size:.85rem;color:var(--muted)}
.chapter-card.approved{background:var(--warm);border-color:#e2d9c1}
.aux-block{padding-top:12px}
#aux-list{display:grid;gap:10px}
.aux-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;text-decoration:none;color:inherit}
.aux-card h3{margin:0 0 6px;font-size:1rem}
.aux-card p{margin:0;font-size:.85rem;color:var(--muted)}
.guide-block{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:16px 0;max-width:42rem}
.guide-block h2{margin:0 0 8px;font-size:1.1rem}
.guide-block p,.guide-block li{font-size:.95rem}
.guide-block ul{margin:0;padding-left:1.2em}
footer{max-width:1100px;margin:auto;border-top:1px solid var(--line);padding:24px 28px 40px;font-size:.8rem;color:var(--muted)}
button:focus-visible,a:focus-visible{outline:3px solid #bf7223;outline-offset:4px}
@media(max-width:760px){main,.topbar,footer{padding-left:16px;padding-right:16px}h1{font-size:2rem}.chapter-card{min-height:0}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}