:root{--bg:#060b14;--panel:#0d1626;--panel2:#121a2d;--line:#1d2f4b;--cyan:#23d9ff;--purple:#7c4dff;--text:#edf5ff;--muted:#9fb0c7;--soft:#172033;--radius:24px;--shadow:0 24px 70px rgba(0,0,0,.35)}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 20% 0%,rgba(35,217,255,.12),transparent 32%),radial-gradient(circle at 80% 10%,rgba(124,77,255,.14),transparent 34%),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.site-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:16px 5vw;background:rgba(6,11,20,.82);backdrop-filter:blur(18px);border-bottom:1px solid rgba(35,217,255,.14)}.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.04em}.brand-mark{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--cyan),var(--purple));color:#06101c}.site-nav{display:flex;gap:20px;color:var(--muted);font-size:15px}.site-nav a:hover{color:var(--cyan)}.nav-toggle{display:none;background:var(--soft);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:8px 12px}.hero{padding:76px 5vw 42px;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}.eyebrow{display:inline-flex;border:1px solid rgba(35,217,255,.35);border-radius:999px;padding:6px 14px;color:var(--cyan);background:rgba(35,217,255,.06);font-size:14px}.hero h1,.page-hero h1{font-size:clamp(34px,5vw,68px);line-height:1.12;margin:22px 0 18px}.lead{font-size:18px;color:var(--muted);max-width:760px}.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}.btn{border:1px solid rgba(35,217,255,.4);border-radius:16px;padding:12px 20px;background:rgba(35,217,255,.1);color:var(--text);font-weight:700}.btn.primary{background:linear-gradient(135deg,var(--cyan),var(--purple));color:#06101c;border:0}.hero-card{position:relative}.hero-card img{border-radius:30px;box-shadow:var(--shadow);border:1px solid rgba(35,217,255,.2)}.domain-pill{position:absolute;left:28px;bottom:28px;background:rgba(6,11,20,.82);border:1px solid rgba(35,217,255,.35);border-radius:999px;padding:10px 16px;color:var(--cyan)}section{padding:58px 5vw}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:28px}.section-head h2,.page-section h2{font-size:clamp(26px,3vw,42px);margin:0}.section-head p{color:var(--muted);max-width:620px;margin:0}.grid{display:grid;gap:22px}.grid.three{grid-template-columns:repeat(3,1fr)}.grid.four{grid-template-columns:repeat(4,1fr)}.card,.video-card,.panel{background:linear-gradient(180deg,rgba(18,26,45,.95),rgba(9,15,28,.95));border:1px solid rgba(35,217,255,.14);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.card h3,.video-card h3{margin:12px 0 8px}.card p,.video-card p,.panel p,.timeline p,.faq p{color:var(--muted);margin:0}.video-card img{border-radius:18px;border:1px solid rgba(255,255,255,.08);margin-bottom:16px}.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.tag{padding:5px 10px;border-radius:999px;background:rgba(124,77,255,.13);color:#d8ccff;font-size:13px}.timeline{display:grid;gap:16px}.timeline-item{display:grid;grid-template-columns:92px 1fr;gap:18px;align-items:start;padding:20px;border-radius:20px;background:#0b1323;border:1px solid var(--line)}.timecode{color:var(--cyan);font-weight:800}.compare{display:grid;grid-template-columns:1fr 1fr;gap:22px}.compare .panel{min-height:260px;background:linear-gradient(135deg,#0d1626,#171338)}.bars{margin-top:24px;display:grid;gap:12px}.bar{height:14px;border-radius:99px;background:#263956;overflow:hidden}.bar span{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--purple));border-radius:inherit}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.step{counter-increment:step;position:relative;padding:22px;background:#0b1323;border:1px solid var(--line);border-radius:20px}.step:before{content:counter(step);display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:var(--cyan);color:#06101c;font-weight:900;margin-bottom:12px}.article-list{display:grid;gap:14px}.article{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-bottom:1px solid var(--line);color:var(--muted)}.faq{display:grid;gap:14px}.faq details{background:#0b1323;border:1px solid var(--line);border-radius:18px;padding:18px}.faq summary{cursor:pointer;font-weight:800}.cta{margin:56px 5vw;padding:38px;border-radius:30px;background:linear-gradient(135deg,rgba(35,217,255,.14),rgba(124,77,255,.18));border:1px solid rgba(35,217,255,.2);display:flex;justify-content:space-between;gap:24px;align-items:center}.page-hero{padding:70px 5vw 34px;border-bottom:1px solid rgba(35,217,255,.12);background:linear-gradient(180deg,rgba(35,217,255,.05),transparent)}.page-layout{display:grid;grid-template-columns:260px 1fr;gap:28px}.side{position:sticky;top:90px;align-self:start;background:#0b1323;border:1px solid var(--line);border-radius:20px;padding:18px}.side a{display:block;color:var(--muted);padding:9px 0}.side a:hover{color:var(--cyan)}.site-footer{padding:42px 5vw;background:#050912;border-top:1px solid rgba(35,217,255,.12);color:var(--muted)}.footer-grid{display:grid;grid-template-columns:2fr 1.4fr 1.4fr;gap:24px}.footer-grid strong{color:var(--text)}.footer-bottom{margin-top:26px;padding-top:18px;border-top:1px solid #172033}.form{display:grid;gap:14px}.form input,.form textarea,.form select{width:100%;background:#08111f;border:1px solid var(--line);border-radius:14px;padding:13px;color:var(--text)}.metric{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:14px}.param-list{display:grid;gap:12px}.param{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:10px;color:var(--muted)}@media(max-width:920px){.hero,.page-layout,.compare{grid-template-columns:1fr}.grid.three,.grid.four,.steps,.footer-grid{grid-template-columns:1fr 1fr}.site-nav{display:none;position:absolute;left:5vw;right:5vw;top:70px;flex-direction:column;background:#07111f;border:1px solid var(--line);border-radius:18px;padding:18px}.site-nav.open{display:flex}.nav-toggle{display:block}.cta{display:block}.side{position:static}}@media(max-width:560px){section{padding:42px 5vw}.hero{padding-top:48px}.grid.three,.grid.four,.steps,.footer-grid{grid-template-columns:1fr}.section-head{display:block}.timeline-item{grid-template-columns:1fr}.article{display:block}.domain-pill{position:static;margin-top:14px;display:inline-flex}.hero-card{display:flex;flex-direction:column}.card,.video-card,.panel{padding:20px}.site-header{padding:14px 4vw}}