:root{--primary:#0891b2;--secondary:#164e63;--accent:#f97316;--bg:#ffffff;--surface:#ecfeff;--surface-alt:#cffafe;--text:#032527;--muted:#64748b;--border:#67e8f9;--row-alt:#ecfeff;--radius:10px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.65;font-size:17px}
a{color:var(--primary);text-decoration:underline}
a:hover{color:var(--secondary)}
header.site{position:sticky;top:0;z-index:20;background:linear-gradient(90deg,var(--secondary),var(--primary));color:#fff;box-shadow:0 2px 6px rgba(0,0,0,.12)}
header.site .wrap{max-width:1140px;margin:0 auto;padding:14px 18px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
header.site a{color:#fff;text-decoration:none;font-weight:600}
header.site nav a{margin-right:12px}
header.site nav a:hover{text-decoration:underline;color:#fff}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.05rem}
.brand img{width:36px;height:36px}
main{max-width:1140px;margin:0 auto;padding:24px 18px 60px}
.hero{background:linear-gradient(135deg,var(--surface-alt),var(--surface));border:1px solid var(--border);border-radius:var(--radius);padding:32px 26px;margin-bottom:28px}
h1{font-size:1.9rem;line-height:1.25;margin:0 0 12px;color:var(--secondary)}
h2{font-size:1.4rem;color:var(--secondary);border-left:5px solid var(--accent);background:var(--surface);padding:10px 14px;border-radius:0 var(--radius) var(--radius) 0;margin:36px 0 14px}
h3{color:var(--secondary);margin-top:24px}
.byline{color:var(--muted);font-size:.95rem;margin:0 0 12px}
.marker{display:inline-block;background:var(--accent);color:#fff;padding:3px 10px;border-radius:999px;font-weight:700;font-size:.85rem;margin-right:8px}
.note{background:var(--surface-alt);border:1px solid var(--border);padding:10px 14px;border-radius:var(--radius);margin:14px 0;font-size:.95rem}
.toc{background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius);padding:14px 18px;margin:20px 0}
.toc h2{border:0;background:transparent;padding:0;font-size:1.05rem;margin:0 0 8px}
.toc ol{margin:0;padding-left:20px}
.toc a{text-decoration:none}
ul{padding-left:0;list-style:none}
ul li{position:relative;padding-left:22px;margin:6px 0}
ul li:before{content:"▸";color:var(--accent);position:absolute;left:0;font-weight:700}
ol{counter-reset:step;padding-left:0;list-style:none}
ol li{counter-increment:step;position:relative;padding-left:38px;margin:8px 0}
ol li:before{content:counter(step);position:absolute;left:0;top:0;background:var(--primary);color:#fff;width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:700}
.table-wrap{overflow-x:auto;margin:18px 0}
table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
th{background:linear-gradient(90deg,var(--primary),var(--secondary));color:#fff;text-align:left;padding:10px 12px;font-size:.95rem}
td{padding:10px 12px;border-top:1px solid var(--border);font-size:.94rem}
tr:nth-child(even) td{background:var(--row-alt)}
details{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;margin:10px 0}
details summary{cursor:pointer;font-weight:600;list-style:none;position:relative;padding-right:28px}
details summary::-webkit-details-marker{display:none}
details summary:after{content:"▼";position:absolute;right:4px;top:2px;transition:transform .2s;color:var(--accent)}
details[open] summary:after{transform:rotate(180deg)}
.author-box{background:linear-gradient(135deg,var(--surface),var(--surface-alt));border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-top:40px;display:flex;gap:16px;align-items:flex-start}
.author-box img{width:74px;height:74px;border-radius:50%;background:#fff}
.author-box h3{margin:0 0 6px}
footer.site{background:var(--secondary);color:#e2e8f0;padding:28px 18px;margin-top:40px}
footer.site .wrap{max-width:1140px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px}
footer.site a{color:#67e8f9}
.svg-fig{display:block;margin:20px auto;max-width:100%;height:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:10px}
.cta{display:inline-block;background:var(--accent);color:#fff;padding:10px 18px;border-radius:var(--radius);text-decoration:none;font-weight:600;margin:6px 4px}
.cta:hover{color:#fff;background:var(--secondary)}
.compliance{background:var(--surface-alt);border-left:5px solid var(--accent);padding:10px 14px;margin:16px 0;border-radius:0 var(--radius) var(--radius) 0;font-size:.92rem}
@media(max-width:700px){h1{font-size:1.5rem}h2{font-size:1.2rem}body{font-size:16px}header.site .wrap{flex-direction:column;align-items:flex-start}}
@media(min-width:980px){main{padding:32px 24px 80px}}