:root{--ink:#172622;--muted:#5d6a66;--paper:#f5f3ed;--white:#fff;--line:#d8ddd8;--sage:#dce8df;--green:#234b3f;--orange:#c86a3b;--soft:#ece9df;--radius:18px;--serif:"Newsreader",Georgia,serif;--sans:"DM Sans",Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.65}.page-header{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:0 clamp(20px,6vw,84px);border-bottom:1px solid var(--line);background:rgba(245,243,237,.95);position:sticky;top:0;z-index:10}.page-brand{display:flex;align-items:center;gap:.65rem;text-decoration:none;font-weight:700}.brand-mark{width:30px;height:30px;display:grid;place-items:center;border-radius:50%;background:var(--green);color:#fff}.page-nav{display:flex;gap:1.1rem;align-items:center}.page-nav a{color:var(--green);font-size:.88rem;font-weight:700;text-underline-offset:3px}.lang-toggle{border:1px solid var(--ink);background:transparent;border-radius:999px;padding:.42rem .75rem;font:inherit;font-size:.82rem;cursor:pointer}.page-main{max-width:1060px;margin:auto;padding:clamp(54px,8vw,100px) 22px 100px}.page-hero{display:grid;grid-template-columns:1.3fr .7fr;gap:7vw;align-items:end;padding-bottom:3rem;border-bottom:1px solid var(--line)}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.72rem;font-weight:700;color:var(--orange);margin:0 0 .9rem}.page-hero h1{font-family:var(--serif);font-size:clamp(2.8rem,6vw,5.7rem);line-height:1;letter-spacing:-.035em;margin:.15rem 0 1.3rem}.lead{font-size:1.12rem;color:var(--muted);max-width:740px}.hero-aside{background:var(--green);color:#fff;border-radius:var(--radius);padding:1.4rem}.hero-aside strong{display:block;font-family:var(--serif);font-size:1.55rem}.hero-aside p{color:#d3ded9;margin:.6rem 0 0;font-size:.9rem}.notice{margin:2rem 0;padding:1rem 1.1rem;border-left:4px solid var(--orange);background:#fff4e9}.section{padding:2.7rem 0;border-bottom:1px solid var(--line)}.section h2{font-family:var(--serif);font-size:clamp(2rem,4vw,3.4rem);line-height:1.05;margin:0 0 1.3rem}.section h3{font-family:var(--serif);font-size:1.45rem;margin:.2rem 0 .6rem}.section p,.section li{font-size:1rem}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:1.35rem}.card p{margin-bottom:0;color:var(--muted)}.checklist{list-style:none;padding:0;margin:0}.checklist li{padding:.72rem 0 .72rem 1.8rem;border-bottom:1px solid var(--line);position:relative}.checklist li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:700}.split{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.scope{padding:1.35rem;border-radius:var(--radius);border:1px solid var(--line);background:var(--white)}.scope.clinical{background:#e8eee9}.scope ul{padding-left:1.2rem}.steps{counter-reset:step;list-style:none;padding:0;margin:0;display:grid;gap:.8rem}.steps li{counter-increment:step;background:#fff;border:1px solid var(--line);border-radius:14px;padding:1rem 1rem 1rem 4rem;position:relative}.steps li:before{content:counter(step);position:absolute;left:1rem;top:1rem;width:2rem;height:2rem;border-radius:50%;display:grid;place-items:center;background:var(--green);color:#fff;font-weight:700}.guide-links{display:grid;grid-template-columns:repeat(2,1fr);gap:.8rem}.guide-links a{display:block;padding:1rem 1.1rem;background:#fff;border:1px solid var(--line);border-radius:14px;color:var(--green);font-weight:700}.sources a{color:var(--green)}.cta{margin-top:3rem;background:var(--green);color:#fff;border-radius:var(--radius);padding:1.8rem}.cta h2{font-family:var(--serif);font-size:2rem;margin:0}.cta p{color:#d2ded9}.cta a{display:inline-block;background:#fff;color:var(--green);padding:.75rem 1rem;border-radius:999px;font-weight:700}.page-footer{max-width:1060px;margin:auto;padding:1.6rem 22px 3rem;border-top:1px solid var(--line);color:var(--muted);font-size:.78rem}.page-footer a{color:var(--green)}body.lang-en [data-lang="zh"],body.lang-zh [data-lang="en"]{display:none!important}body.lang-zh .page-hero h1,body.lang-zh .section h2,body.lang-zh .section h3,body.lang-zh .hero-aside strong,body.lang-zh .cta h2{font-family:var(--sans);letter-spacing:0;line-height:1.2}@media(max-width:760px){.page-header{align-items:flex-start;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}.page-nav{width:100%;order:3;overflow:auto}.page-hero,.grid,.split,.guide-links{grid-template-columns:1fr}.page-hero{gap:1.4rem}.page-hero h1{font-size:3rem}.page-main{padding-top:46px}.lang-toggle{margin-left:auto}}