:root{--bg:#edf4ed;--ink:#1d2d23;--accent:#39785a;--card:#fbfefb;--line:#b8ceb9}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.78}a{color:var(--accent);text-decoration:none}header,footer{display:flex;justify-content:space-between;align-items:center;gap:2rem;padding:1.2rem 4vw;border-bottom:1px solid var(--line);background:var(--card)}header nav,footer nav,.topic-map{display:flex;gap:.8rem;flex-wrap:wrap}.brand{font-weight:900;color:var(--ink)}.brand small{display:block;font-size:.58rem;letter-spacing:.16em;color:var(--accent)}main{width:min(1020px,92vw);margin:auto}.hero{padding:6rem 0 4rem}.eyebrow,.step{font-weight:900;letter-spacing:.16em;font-size:.72rem;color:var(--accent)}h1{font-size:clamp(3.6rem,11vw,7.5rem);line-height:.9;letter-spacing:-.06em;margin:.4rem 0 1.6rem}h2{font-size:clamp(1.8rem,5vw,3rem);line-height:1.15}.lead,.intent{max-width:900px;font-size:1.08rem}.intent{font-weight:800}.topic-map a{padding:.4rem .7rem;border:1px solid var(--line);background:var(--card)}aside{margin-top:1.4rem;padding:1rem 1.2rem;border-left:5px solid var(--accent);background:var(--card)}.answer{padding:4rem 0;border-top:1px solid var(--line)}.answer p[data-copy-role="answer"]{font-size:1.04rem;max-width:880px}.faq{padding:4rem 0}details{padding:1rem 0;border-top:1px solid var(--line)}summary{font-weight:900;cursor:pointer}footer{border-top:1px solid var(--line);border-bottom:0}.support{max-width:760px;margin:6rem auto;padding:3rem;background:var(--card);border:1px solid var(--line)}.support h1{font-size:3rem}@media(max-width:720px){header,footer{display:block}header nav,footer nav{margin-top:.8rem}.hero{padding-top:4rem}}
.hero_split{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(16rem,.6fr);column-gap:2rem}.hero_frame{border:1px solid var(--line);padding:4rem 4vw;margin-top:3rem;background:var(--card)}.hero_rail{border-left:10px solid var(--accent);padding-left:2rem}.hero_center{text-align:center}.hero_center .topic-map{justify-content:center}
.card_outline{padding-left:1.4rem;border-left:3px solid var(--accent)}.card_numbered .step{font-size:1rem}.card_grid{display:grid;grid-template-columns:8rem 1fr;column-gap:1.5rem}.card_grid h2,.card_grid p{grid-column:2}.card_ribbon .step{display:inline-block;padding:.3rem .7rem;background:var(--accent);color:var(--card)}
.evidence-source{margin:3rem 0;padding:2rem;border:1px solid var(--line);background:var(--card)}.evidence_timeline{border-left:8px solid var(--accent)}.evidence_matrix{background:linear-gradient(135deg,var(--card),var(--bg))}.evidence_cards{box-shadow:10px 10px 0 var(--line)}
[data-faq-layout="faq_band"]{border-top:8px solid var(--accent)}[data-faq-layout="faq_columns"] details{display:grid;grid-template-columns:minmax(12rem,.4fr) 1fr;gap:1rem}.trust-module{margin:2rem 0;padding:1rem 1.2rem;background:var(--card);border:1px solid var(--line)}.trust_strip{border-left:8px solid var(--accent)}.trust_panel{box-shadow:8px 8px 0 var(--line)}
html,body{max-width:100%;overflow-x:hidden}table{width:100%;table-layout:fixed;border-collapse:collapse}td{padding:.7rem;overflow-wrap:anywhere}img,video,svg{max-width:100%;height:auto}.answer-group{margin:0;padding-left:0}.answer-group>li{list-style:none}h1,h2,p,a,summary{overflow-wrap:anywhere}
@media(max-width:720px){body{font-size:16px}.hero_split,.card_grid,[data-faq-layout="faq_columns"] details{display:block}.hero,.hero_frame{padding:2rem 0 1.5rem;margin-top:0}.hero_frame{padding-left:5vw;padding-right:5vw}h1{font-size:clamp(2.4rem,13vw,4rem);margin:.3rem 0 1rem}.lead,.intent{font-size:1rem}.answer{padding:2.5rem 0}header,footer{padding:1rem 4vw}header nav a,footer nav a,.topic-map a,.brand{display:inline-flex;align-items:center;min-width:44px;min-height:44px;padding:.5rem .7rem}summary{min-height:44px;padding:.6rem 0}.support{width:92vw;margin:2rem auto;padding:1.5rem}.support h1{font-size:2.4rem}}


/* Wave 5 local topical-visual refinement. */
.wave5-intro{max-width:900px;margin:1.35rem auto 0;padding:1rem 1.2rem;border-left:4px solid #865a37;background:#ffffffcc;font-size:1.02rem}
.wave5-topic-visual{max-width:1000px;margin:1.8rem 0 0;padding:1rem;border:1px solid var(--line);background:var(--card)}
.wave5-topic-visual img{display:block;width:100%;height:auto;border-radius:.65rem}
.wave5-visual-caption{margin:.7rem 0 0;color:var(--accent);font-size:.92rem}
.wave5-core-answer{margin:4rem 0 0;padding:2rem;border:1px solid var(--line);border-top:6px solid #865a37;background:var(--card)}
.wave5-faq{margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--line)}