:root{
  --bg:#080a0f;--panel:#0e1118;--panel2:#121722;--line:#202735;
  --text:#f4f7fb;--muted:#9ca7b7;--accent:#8ea9ff;--accent2:#b69cff;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(900px 500px at 75% 0%,rgba(103,126,255,.13),transparent 62%),var(--bg);color:var(--text);font-family:Inter,"Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:inherit;text-decoration:none}.shell{width:min(1180px,calc(100% - 40px));margin:auto}
.noise{position:fixed;inset:0;pointer-events:none;opacity:.025;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.4'/%3E%3C/svg%3E")}
.nav{height:72px;display:flex;align-items:center;gap:34px;padding:0 max(24px,calc((100vw - 1180px)/2));position:sticky;top:0;z-index:20;background:rgba(8,10,15,.72);backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,.055)}
.brand{font-weight:800;display:flex;align-items:center;gap:10px;font-size:17px}.logo,.ai-mark{display:grid;place-items:center;background:linear-gradient(135deg,#e8ecff,#8298ef);color:#0a0c12;font-weight:900}
.logo{width:32px;height:32px;border-radius:10px}.links{display:flex;gap:28px;margin-left:auto}.links a{font-size:14px;color:var(--muted)}.links a:hover{color:white}.nav-cta{font-size:13px;background:#f4f7fb;color:#0b0e14;padding:10px 15px;border-radius:10px;font-weight:700}
.hero{min-height:760px;display:grid;grid-template-columns:.92fr 1.08fr;gap:70px;align-items:center;padding-top:80px;padding-bottom:85px}
.badge,.section-kicker{font-size:12px;letter-spacing:.15em;text-transform:uppercase;color:#aeb9ca}.badge{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);padding:8px 11px;border-radius:999px}.dot{width:7px;height:7px;border-radius:50%;background:#76e39b;box-shadow:0 0 14px #76e39b}
h1{font-size:64px;line-height:1.02;letter-spacing:-.055em;margin:25px 0 22px}h1 span{background:linear-gradient(90deg,#fff,#9db0ff 52%,#c3a8ff);-webkit-background-clip:text;color:transparent}
.lead{font-size:18px;line-height:1.8;color:var(--muted);max-width:610px}.hero-actions{display:flex;gap:12px;margin:34px 0}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:13px 18px;font-weight:750;font-size:14px;border:1px solid var(--line)}.primary{background:#f5f7fb;color:#0a0d13;border-color:#fff}.ghost{background:#0d1118}.large{padding:16px 22px}.meta{display:flex;gap:18px;flex-wrap:wrap;color:#7f8b9d;font-size:12px}
.app-card{border:1px solid #242b39;border-radius:22px;overflow:hidden;background:#0d1017;box-shadow:0 28px 100px rgba(0,0,0,.44),0 0 80px rgba(94,111,238,.08);transform:perspective(1200px) rotateY(-2deg) rotateX(1deg)}
.window-bar{height:48px;border-bottom:1px solid #1d2330;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 15px;color:#919cad;font-size:12px}.traffic{display:flex;gap:6px}.traffic i{width:8px;height:8px;border-radius:50%;background:#303746}.status{justify-self:end}.status b{display:inline-block;width:6px;height:6px;border-radius:50%;background:#71df99;margin-right:6px}
.app-body{display:grid;grid-template-columns:178px 1fr;min-height:480px}aside{background:#090c12;border-right:1px solid #1d2330;padding:14px}.switch{padding:10px 11px;border-radius:9px;color:#8d98a9;margin-bottom:5px;font-size:13px}.switch.active{background:#151b26;color:#f5f7fb}.aside-title{font-size:10px;color:#5e6877;margin:24px 8px 8px}.conversation{font-size:11px;color:#707b8b;padding:9px;border-radius:8px}.conversation.active{color:#bbc4d3;background:#0f141d}
.chat{padding:20px;display:flex;flex-direction:column}.chat-title{font-weight:700;font-size:14px;border-bottom:1px solid #171d28;padding-bottom:15px}.chat-title small{float:right;color:#748095;font-weight:500}.message{max-width:82%;font-size:12px;line-height:1.65;margin-top:22px}.message.user{align-self:flex-end;background:#19202c;padding:12px 14px;border-radius:14px 14px 4px 14px}.message.ai{display:flex;gap:10px;color:#c5cddb}.ai-mark{width:25px;height:25px;border-radius:8px;flex:0 0 auto}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:14px}.steps span{border:1px solid #222b3a;padding:7px;border-radius:8px;color:#8d9aad;font-size:9px}.composer{margin-top:auto;border:1px solid #283141;border-radius:14px;padding:13px;color:#667286;font-size:11px;background:#111620}.composer-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:26px}.model{color:#a8b5c7}.composer button{border:0;width:28px;height:28px;border-radius:9px;background:#eff3fa;font-weight:900}
.section{padding:110px 0}.section h2{font-size:42px;letter-spacing:-.035em;margin:12px 0 42px;max-width:820px}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.mode-card{border:1px solid var(--line);border-radius:20px;padding:32px;background:linear-gradient(180deg,#0f131b,#0b0e14)}.mode-card.highlight{background:radial-gradient(500px 220px at 100% 0%,rgba(116,136,255,.15),transparent 70%),#0e121a}.mode-icon{font-size:26px}.mode-card h3{font-size:25px;margin:20px 0 8px}.mode-card p,.security p,.download p{color:var(--muted);line-height:1.75}.mode-card ul{list-style:none;padding:0;margin:24px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:10px}.mode-card li{font-size:13px;color:#aab4c4;border:1px solid #202735;padding:10px;border-radius:9px}
.route{border:1px solid var(--line);border-radius:22px;padding:30px;display:grid;grid-template-columns:1.2fr 80px 130px 80px 1.1fr;align-items:center;background:#0b0f15}.route-input{padding:16px;border:1px solid #252e3e;border-radius:12px;color:#bbc5d4}.route-line{height:1px;background:#2a3344}.route-core{text-align:center;background:linear-gradient(145deg,#e8edff,#91a5ff);color:#0a0c12;border-radius:16px;padding:18px;font-weight:900}.route-core small{font-size:10px}.route-models{display:flex;gap:7px;flex-wrap:wrap}.route-models span{font-size:10px;border:1px solid #2a3344;border-radius:999px;padding:8px 10px;color:#aab5c5}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}.feature-grid article{border:1px solid var(--line);background:#0c1017;border-radius:16px;padding:24px}.feature-grid b{font-size:21px}.feature-grid h3{margin:17px 0 8px}.feature-grid p{font-size:13px;color:#8995a6;line-height:1.65}
.security{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}.security-flow{border:1px solid var(--line);border-radius:20px;padding:28px;display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;background:#0d1118}.security-flow span{font-size:12px;border:1px solid #252e3d;padding:11px 13px;border-radius:10px}.security-flow i{color:#566176}
.download{border:1px solid #263044;border-radius:24px;padding:44px;background:radial-gradient(500px 220px at 90% 10%,rgba(116,136,255,.16),transparent 70%),#0c1017;margin-top:50px;margin-bottom:50px;display:grid;grid-template-columns:1fr auto;gap:22px;align-items:center}.download h2{margin-bottom:10px}.download small{grid-column:1/-1;color:#687487}
.faq{display:grid;gap:10px}.faq details{border:1px solid var(--line);border-radius:14px;background:#0c1017;padding:17px 18px}.faq summary{cursor:pointer;font-weight:700}.faq p{color:var(--muted);line-height:1.7;font-size:14px}
footer{border-top:1px solid #181e29;padding:34px 0;color:#6e798a}.footer-inner{display:flex;justify-content:space-between;align-items:center;font-size:12px}.footer-inner div:first-child{display:flex;gap:12px}.footer-inner strong{color:#cdd5e1}
@media(max-width:900px){.links{display:none}.hero{grid-template-columns:1fr;padding-top:55px}.app-card{transform:none}h1{font-size:50px}.mode-grid,.security{grid-template-columns:1fr}.feature-grid{grid-template-columns:1fr 1fr}.route{grid-template-columns:1fr;gap:12px}.route-line{height:18px;width:1px;justify-self:center}.download{grid-template-columns:1fr}.app-card{margin-top:10px}}
@media(max-width:600px){.shell{width:min(100% - 24px,1180px)}.nav{padding:0 12px}.nav-cta{font-size:11px;padding:9px 10px}h1{font-size:40px}.lead{font-size:15px}.hero{gap:28px;min-height:auto}.app-body{grid-template-columns:92px 1fr}.app-body aside{padding:8px}.conversation{font-size:9px}.chat{padding:12px}.message{max-width:95%}.steps{grid-template-columns:1fr 1fr}.section{padding:75px 0}.section h2{font-size:31px}.feature-grid{grid-template-columns:1fr}.mode-card ul{grid-template-columns:1fr}.footer-inner{align-items:flex-start;gap:12px;flex-direction:column}}