:root{color-scheme:dark;--bg:#090c0f;--panel:#11171b;--line:#263238;--text:#edf7f5;--muted:#9eb0ad;--brand:#20c7b5;--brand2:#73e2d5;--code:#071311}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.75 Inter,"Noto Sans SC","Microsoft YaHei",sans-serif;letter-spacing:0}a{color:var(--brand2);text-decoration:none}a:hover{text-decoration:underline}header{border-bottom:1px solid var(--line);background:rgba(9,12,15,.96);position:sticky;top:0;z-index:10}.nav{max-width:1120px;margin:auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-weight:800;color:white;font-size:18px}.brand b{color:var(--brand)}nav a{color:var(--muted);margin-left:20px;font-size:14px}.hero{border-bottom:1px solid var(--line);padding:72px 24px 54px}.hero-inner,main{max-width:920px;margin:auto}.eyebrow{color:var(--brand);font-size:13px;font-weight:700;text-transform:uppercase}h1{font-size:clamp(34px,6vw,60px);line-height:1.12;margin:12px 0 22px;letter-spacing:0}h2{font-size:28px;line-height:1.3;margin:52px 0 15px;letter-spacing:0}h3{font-size:20px;margin:30px 0 8px;letter-spacing:0}p{color:#c9d6d4}.lead{font-size:20px;color:var(--muted);max-width:780px}.meta{font-size:14px;color:#7f928f;margin-top:24px}main{padding:28px 24px 80px}.toc{border-left:3px solid var(--brand);padding:4px 0 4px 22px;margin:26px 0 44px}.toc a{display:block;margin:6px 0}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.item{border:1px solid var(--line);background:var(--panel);padding:22px;border-radius:8px}.item h2,.item h3{margin-top:0}.tag{display:inline-block;border:1px solid #2f5e59;color:var(--brand2);padding:3px 9px;border-radius:4px;font-size:12px;margin-right:6px}code,pre{font-family:"SFMono-Regular",Consolas,monospace}code{background:#15211f;color:#8ff1e4;padding:2px 5px;border-radius:3px}pre{background:var(--code);border:1px solid var(--line);padding:18px;overflow:auto;border-radius:6px;color:#d8eeea;line-height:1.55}table{width:100%;border-collapse:collapse;margin:20px 0}th,td{border:1px solid var(--line);padding:12px;text-align:left;vertical-align:top}th{background:#121d1c;color:white}.note{border-left:3px solid #e6b450;background:#171810;padding:16px 18px;color:#ded5ae;margin:24px 0}.cta{border-top:1px solid var(--line);margin-top:50px;padding-top:28px}.faq dt{font-weight:700;color:white;margin-top:24px}.faq dd{margin:6px 0 0;color:#bdcbc8}footer{border-top:1px solid var(--line);padding:30px 24px;color:#7f928f;text-align:center;font-size:14px}@media(max-width:700px){.nav nav{display:none}.hero{padding-top:48px}.grid{grid-template-columns:1fr}h2{font-size:24px}table{font-size:14px}}