:root{--bg:#f5f7fb;--card:#fff;--text:#142033;--muted:#667085;--blue:#1358db;--blue2:#0b43ac;--line:#d9e2ef;--warn:#fff7e6}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.container{max-width:1080px;margin:0 auto;padding:0 20px}.topbar{background:#111827;color:#fff;text-align:center;font-size:13px;padding:8px}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}.header-inner{height:68px;display:flex;align-items:center;justify-content:space-between}.logo{font-size:26px;font-weight:800;text-decoration:none;color:#111827}.logo span{color:var(--blue)}nav a{margin-left:18px;color:#344054;text-decoration:none;font-weight:600}.hero{padding:42px 0;background:linear-gradient(180deg,#fff,#eef4ff)}.hero-grid{display:grid;grid-template-columns:1.35fr .75fr;gap:26px;align-items:stretch}.hero-card,.signup-card,.content,.side-card{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:0 12px 30px rgba(20,32,51,.08)}.hero-card{padding:42px}.label{color:var(--blue);font-weight:800;text-transform:uppercase;font-size:13px;letter-spacing:.04em}h1{font-size:44px;line-height:1.08;margin:14px 0}.lead{font-size:20px;color:#344054}.meta{font-size:14px;color:var(--muted);margin:18px 0}.btn{display:inline-block;background:var(--blue);color:#fff;border:0;border-radius:12px;padding:14px 20px;font-weight:800;text-decoration:none;cursor:pointer}.btn:hover{background:var(--blue2)}.full{width:100%;text-align:center}.signup-card{padding:26px}label{display:block;font-weight:700;margin:14px 0 8px}input{width:100%;border:1px solid #cbd5e1;border-radius:10px;padding:13px;font-size:16px}small{display:block;color:var(--muted);font-size:12px;margin-top:12px}.article-wrap{display:grid;grid-template-columns:1fr 300px;gap:26px;padding:34px 20px}.content{padding:32px}.main-img{width:100%;border-radius:16px;border:1px solid var(--line);background:#eef4ff}.notice{background:var(--warn);border:1px solid #ffd591;border-radius:14px;padding:14px}.content h2{margin-top:34px;font-size:28px}.checklist{display:grid;gap:14px}.checklist div{border:1px solid var(--line);border-radius:14px;padding:16px;background:#fbfdff}.checklist span{display:block;color:var(--muted);margin-top:4px}blockquote{border-left:5px solid var(--blue);margin:30px 0;padding:15px 20px;background:#eef4ff;border-radius:10px;font-size:19px}.cta-box{background:#102a63;color:#fff;border-radius:18px;padding:24px;margin:30px 0}.cta-box p{color:#dbeafe}.sidebar{display:grid;gap:18px;align-content:start;position:sticky;top:90px}.side-card{padding:22px}.side-card ul{padding-left:20px}.risk{background:#fff1f2;border-color:#fecdd3;color:#7f1d1d;font-weight:700}details{border-top:1px solid var(--line);padding:16px 0}summary{font-weight:800;cursor:pointer}.footer{background:#111827;color:#d1d5db;padding:34px 0;margin-top:30px}.footer-grid{display:flex;justify-content:space-between;gap:30px}.footer a{display:block;color:#d1d5db;text-decoration:none;margin:6px 0}.legal{max-width:860px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px;margin:34px auto}@media(max-width:850px){.hero-grid,.article-wrap{grid-template-columns:1fr}.header-inner{height:auto;gap:12px;flex-direction:column;padding:14px 20px}nav a{margin:0 7px}.hero-card{padding:26px}h1{font-size:32px}.sidebar{position:static}.footer-grid{flex-direction:column}}