:root{color-scheme:light;--paper:#f8fafc;--panel:#fff;--ink:#14243b;--muted:#596a7c;--accent:#176e83;--accent-dark:#0e5263;--line:#e0e9ed;--warm:#f8eee1;--shadow:0 16px 44px rgba(23,45,65,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.75 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft Yahei",sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}[hidden]{display:none!important}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #e7a854;outline-offset:3px}img{max-width:100%}h1,h2,h3{font-weight:720;letter-spacing:-.025em;line-height:1.25}h1{font-size:clamp(2.15rem,5vw,3.8rem)}h2{font-size:clamp(1.45rem,2.4vw,2.15rem)}h3{font-size:1.15rem}p{margin:.75rem 0 1.1rem}.wrap{width:min(1100px,calc(100% - 44px));margin:auto}.skip{position:absolute;top:-60px;left:16px;background:var(--ink);color:#fff;padding:9px 14px;z-index:10}.skip:focus{top:8px}.topbar{border-bottom:1px solid var(--line);background:rgba(255,255,255,.93)}.top-inner{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:17px 0}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-size:1.16rem;font-weight:780;letter-spacing:-.035em}.brand img{width:32px;height:32px}.brand:hover{text-decoration:none}.nav{display:flex;gap:clamp(10px,2.7vw,28px);align-items:center;flex-wrap:wrap}.nav a{color:#3d5063;font-size:.93rem}.nav a[aria-current="page"]{font-weight:700;color:var(--accent-dark)}.eyebrow{font-size:.78rem;letter-spacing:.13em;text-transform:uppercase;color:var(--accent);font-weight:800}.hero{padding:74px 0 64px;display:grid;grid-template-columns:1.2fr .8fr;align-items:center;gap:65px}.hero h1{margin:12px 0 19px}.lead{font-size:1.12rem;color:var(--muted);max-width:630px}.hero-art{background:linear-gradient(145deg,#eaf3f1,#f4f5e9 80%);border:1px solid #d8e5dd;border-radius:26px;padding:16px;box-shadow:var(--shadow)}.hero-art img{display:block;width:100%}.buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 19px;background:var(--accent-dark);border-radius:10px;color:#fff;font-size:.93rem;font-weight:700}.btn:hover{color:#fff;background:#083d4c;text-decoration:none}.btn.secondary{background:#e8f0f2;color:#185568}.btn.secondary:hover{background:#dce9ec}.section{padding:24px 0 76px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:25px}.section-head p{color:var(--muted)}.section-head h2{margin:0}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:24px;display:flex;flex-direction:column;min-height:240px;transition:box-shadow .2s,transform .2s}.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.card h3{margin:9px 0}.card p{flex:1;color:var(--muted);font-size:.94rem}.tag{font-size:.77rem;color:var(--accent-dark);font-weight:700}.readmore{font-size:.91rem;font-weight:700}.stripe{background:linear-gradient(125deg,#153c4d,#176579);border-radius:18px;padding:33px 38px;display:flex;align-items:center;justify-content:space-between;gap:25px;color:#fff}.stripe h2{margin:0;font-size:1.65rem}.stripe p{margin:.5rem 0 0;color:#d0e4e9}.stripe a{color:#fff;border:1px solid #a9cbd4;padding:9px 17px;border-radius:8px;white-space:nowrap}.stripe a:hover{background:#ffffff19;text-decoration:none}.page-head{padding:66px 0 38px;max-width:790px}.page-head h1{margin:10px 0 15px}.page-head p{color:var(--muted)}.article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(24px,5vw,55px);max-width:820px;margin-bottom:70px}.article h2{margin:2rem 0 .85rem}.article h3{margin:1.5rem 0 .5rem}.article ul,.article ol{padding-left:1.45rem}.article li{margin:.45rem 0}.article pre{overflow:auto;background:#14283a;color:#f0f8ff;padding:18px;border-radius:9px;line-height:1.55}.article code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em}.article :not(pre)>code{background:#eef5f6;color:#194e5d;padding:.12em .35em;border-radius:4px}.article blockquote{border-left:3px solid #71a5a8;color:#446172;padding-left:17px;margin:22px 0}.muted{color:var(--muted)}.crumb{font-size:.87rem;color:var(--muted);padding-top:30px}.crumb a{color:var(--muted)}.search{width:min(100%,430px);border:1px solid #ccdbdf;border-radius:10px;background:#fff;padding:12px 15px;font:inherit;color:var(--ink);margin:4px 0 26px}.empty{display:none;color:var(--muted)}.footer{background:#fff;border-top:1px solid var(--line);padding:30px 0 38px;color:var(--muted);font-size:.87rem}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap}.footer-links{display:flex;gap:20px}.footer a{color:var(--muted)}.notice{padding:15px 18px;background:var(--warm);border-radius:9px}.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.feature{background:#fff;border:1px solid var(--line);padding:18px;border-radius:12px}@media(max-width:790px){.hero{grid-template-columns:1fr;gap:20px;padding:48px 0}.hero-art{max-width:480px}.grid{grid-template-columns:repeat(2,1fr)}.stripe{display:block}.stripe a{display:inline-block;margin-top:20px}.feature-list{grid-template-columns:1fr}}@media(max-width:520px){.top-inner{align-items:flex-start;flex-direction:column;gap:12px}.grid{grid-template-columns:1fr}.section-head{display:block}.section{padding:15px 0 45px}.hero h1{font-size:2.4rem}.stripe{padding:25px}.article{margin-bottom:40px}}