:root{--bg:#f6f7fb;--surface:#fff;--text:#171a21;--muted:#697386;--line:#e7e9ef;--brand:#4f46e5;--brand2:#7c3aed;--soft:#eef0ff;--max:1120px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,"Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.75}a{color:inherit}.wrap{max-width:var(--max);margin:auto;padding:0 22px}
header{background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.nav{height:68px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:20px;font-weight:850;text-decoration:none}.navlinks{display:flex;gap:24px;font-size:14px}.navlinks a{text-decoration:none;color:#404655}.navlinks a:hover{color:var(--brand)}
.hero{background:linear-gradient(135deg,#eef0ff 0%,#fff 58%,#f5edff 100%);padding:86px 0 74px}.eyebrow{display:inline-block;background:var(--soft);color:#4338ca;border-radius:999px;padding:5px 12px;font-size:13px;font-weight:700}.hero h1{font-size:52px;line-height:1.12;letter-spacing:-1px;max-width:820px;margin:18px 0}.hero p{font-size:18px;color:var(--muted);max-width:760px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.btn{display:inline-block;text-decoration:none;border-radius:10px;padding:12px 18px;font-weight:700}.primary{background:var(--brand);color:#fff}.secondary{background:#fff;border:1px solid var(--line)}
.section{padding:68px 0}.section.alt{background:#fff}.section h2{font-size:32px;line-height:1.25;margin:0 0 10px}.lead{color:var(--muted);max-width:760px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:0 8px 28px rgba(22,28,45,.045)}.card h3{margin:8px 0}.icon{font-size:28px}.tag{display:inline-block;background:var(--soft);color:#4338ca;border-radius:999px;padding:4px 10px;font-size:12px;margin:0 6px 6px 0}.article{max-width:820px}.article h1{font-size:42px;line-height:1.2}.article h2{font-size:25px;margin-top:38px}.notice{border-left:4px solid var(--brand);background:#fafaff;padding:16px 18px;margin:24px 0}
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px}.feature{padding:20px;border:1px solid var(--line);border-radius:14px;background:#fff}.feature strong{display:block;margin-bottom:5px}.muted{color:var(--muted)}
footer{background:#171a21;color:#c8cbd3;padding:36px 0;font-size:13px}.footergrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}.footerlinks{display:flex;flex-direction:column;gap:8px}.footerlinks a{color:#c8cbd3;text-decoration:none}
@media(max-width:820px){.navlinks{gap:12px;font-size:12px}.hero h1{font-size:38px}.grid,.features,.footergrid{grid-template-columns:1fr}.section{padding:52px 0}}