:root{--ink:#07101d;--panel:#0d1a2d;--line:rgba(180,206,238,.25);--paper:#f4f7fb;--white:#fff;--muted:#aebbd0;--blue:#2d6bff;--cyan:#40d9d0;--gold:#ffcf66;--radius:6px;--shadow:0 24px 70px rgba(0,0,0,.28)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--ink);color:var(--white);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;letter-spacing:0}a{color:inherit;text-decoration:none}.shell{width:min(1180px,calc(100% - 48px));margin:0 auto}.topbar{height:70px;padding:0 max(24px,calc((100vw - 1180px)/2));display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.12);background:rgba(7,16,29,.92);position:relative;z-index:10}.brand{display:flex;align-items:center;gap:12px;font-size:15px}.brand span{display:grid;place-items:center;width:36px;height:36px;background:var(--white);color:var(--blue);font-weight:900;border-radius:5px}.brand b{font-size:17px}.back{font-size:14px;color:#d9e6f7;border-bottom:1px solid rgba(217,230,247,.5);padding-bottom:3px}.hero{min-height:780px;position:relative;overflow:hidden;display:flex;align-items:center}.hero-image{position:absolute;inset:0;background:url("../assets/ai-start-hero-command-center-v1.jpg") center/cover no-repeat;transform:scale(1.01)}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,12,23,.96) 0%,rgba(5,12,23,.83) 43%,rgba(5,12,23,.52) 67%,rgba(5,12,23,.78) 100%)}.hero-grid{position:absolute;inset:0;opacity:.12;background-image:linear-gradient(rgba(91,151,255,.65) 1px,transparent 1px),linear-gradient(90deg,rgba(91,151,255,.65) 1px,transparent 1px);background-size:72px 72px;mask-image:linear-gradient(to bottom,transparent,#000 28%,#000 70%,transparent)}.hero-content{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) 430px;gap:72px;align-items:center;padding:78px 0}.eyebrow{margin:0 0 22px;color:#83a9ff;font-size:12px;font-weight:800;letter-spacing:0}.hero-copy h1{font-size:clamp(46px,5vw,76px);line-height:1.05;margin:0;max-width:720px}.hero-copy h1 em{font-style:normal;color:var(--gold)}.lead{font-size:20px;line-height:1.75;color:#d8e1ee;max-width:670px;margin:28px 0 38px}.proof{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);background:rgba(8,20,39,.56);backdrop-filter:blur(12px)}.proof div{padding:20px;border-right:1px solid var(--line);min-height:154px}.proof div:last-child{border-right:0}.proof span{display:block;color:var(--cyan);font-size:12px;font-weight:800;margin-bottom:20px}.proof b{display:block;font-size:16px}.proof p{font-size:13px;line-height:1.65;color:var(--muted);margin:10px 0 0}.entry-panel{background:rgba(247,250,255,.97);color:#132034;padding:30px;border-top:4px solid var(--blue);box-shadow:var(--shadow);border-radius:var(--radius)}.panel-head span{color:var(--blue);font-size:12px;font-weight:900}.panel-head b{display:block;font-size:24px;margin:10px 0}.panel-head p{color:#627189;font-size:14px;line-height:1.6;margin:0 0 22px}form{display:grid;gap:14px}label{font-size:13px;font-weight:700;color:#36445b;display:grid;gap:7px}input,textarea{width:100%;border:1px solid #cad4e2;background:#fff;border-radius:4px;padding:13px 14px;font:inherit;color:#17243a;outline:none}input:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(45,107,255,.11)}textarea{min-height:84px;resize:vertical}.consent{display:flex;align-items:flex-start;gap:9px;font-weight:400;line-height:1.5}.consent input{width:16px;height:16px;margin-top:2px;accent-color:var(--blue)}button,#wecomEntry{border:0;border-radius:4px;background:var(--blue);color:#fff;padding:15px 18px;font:inherit;font-weight:900;cursor:pointer;display:flex;align-items:center;justify-content:space-between}button:hover,#wecomEntry:hover{background:#1957e8}button:disabled{opacity:.55;cursor:not-allowed}form small{color:#718096;font-size:12px;line-height:1.6}.success{padding:18px 0 6px}.success>span{display:inline-block;color:#087e76;background:#dff8f5;padding:5px 9px;border-radius:3px;font-size:12px;font-weight:800}.success h2{font-size:28px;margin:16px 0 10px}.success p{color:#5d6c82;line-height:1.7}.success #wecomEntry{margin:22px 0 16px}.secondary-link{display:inline-block;color:var(--blue);font-weight:800;border-bottom:1px solid rgba(45,107,255,.35);padding-bottom:3px}.route{background:#fff;color:#122039}.route-grid{display:grid;grid-template-columns:repeat(3,1fr)}.route-grid>div{padding:44px 34px;border-right:1px solid #dce3ed}.route-grid>div:last-child{border-right:0}.route small{color:#2563eb;font-weight:800}.route b{display:block;font-size:20px;margin:14px 0 8px}.route p{color:#66758a;line-height:1.7;margin:0;font-size:14px}.fit{background:var(--paper);color:#111d31;padding:94px 0}.fit-layout{display:grid;grid-template-columns:360px 1fr;gap:76px}.section-index{font-size:12px;color:var(--blue);font-weight:900}.fit h2{font-size:40px;line-height:1.3;margin:16px 0}.fit-list{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid #cad5e3}.fit-list article{padding:28px 24px 28px 0;border-bottom:1px solid #cad5e3}.fit-list article:nth-child(odd){border-right:1px solid #cad5e3}.fit-list article:nth-child(even){padding-left:24px}.fit-list span{font-size:12px;color:#2870ee;font-weight:800}.fit-list b{display:block;font-size:20px;margin:12px 0}.fit-list p{color:#68788e;line-height:1.7;margin:0}.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);opacity:0;background:#101d31;color:#fff;border:1px solid rgba(255,255,255,.2);padding:12px 18px;border-radius:4px;z-index:30;transition:.25s}.toast.is-visible{opacity:1;transform:translate(-50%,0)}footer{background:#050b14;border-top:1px solid rgba(255,255,255,.1)}footer .shell{min-height:90px;display:flex;align-items:center;justify-content:space-between;color:#9eadc1;font-size:13px}footer b{color:#fff}
@media(max-width:980px){.hero{min-height:auto}.hero-content{grid-template-columns:1fr;gap:40px}.hero-copy{padding-top:30px}.entry-panel{max-width:600px}.fit-layout{grid-template-columns:1fr;gap:32px}}
@media(max-width:680px){.shell{width:min(100% - 28px,1180px)}.topbar{height:62px;padding:0 14px}.brand b{font-size:14px}.back{font-size:12px}.hero-content{padding:52px 0 42px}.hero-shade{background:linear-gradient(180deg,rgba(4,12,24,.78),rgba(4,12,24,.94) 48%,rgba(4,12,24,.98))}.hero-copy h1{font-size:40px}.lead{font-size:17px;margin:22px 0 28px}.proof{grid-template-columns:1fr}.proof div{border-right:0;border-bottom:1px solid var(--line);min-height:auto}.proof div:last-child{border-bottom:0}.entry-panel{padding:23px 18px}.route-grid{grid-template-columns:1fr}.route-grid>div{border-right:0;border-bottom:1px solid #dce3ed;padding:28px 8px}.fit{padding:68px 0}.fit h2{font-size:32px}.fit-list{grid-template-columns:1fr}.fit-list article,.fit-list article:nth-child(even),.fit-list article:nth-child(odd){padding:24px 0;border-right:0}footer .shell{padding:25px 0;display:grid;gap:8px}}
@media(prefers-reduced-motion:no-preference){.hero-copy,.entry-panel{animation:rise .7s cubic-bezier(.2,.8,.2,1) both}.entry-panel{animation-delay:.12s}@keyframes rise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}}
.hero{min-height:calc(100vh - 70px)}
.hero-content{padding:34px 0}
.lead{line-height:1.65;margin:24px 0 28px}
.proof div{padding:18px;min-height:140px}
.proof span{margin-bottom:14px}
.entry-panel{padding:22px 26px}
.panel-head b{font-size:23px;margin:7px 0}
.panel-head p{font-size:13px;line-height:1.5;margin-bottom:14px}
form{gap:9px}
input,textarea{padding:10px 12px}
textarea{min-height:62px}
button,#wecomEntry{padding:13px 16px}
@media(max-width:680px){.hero-content{padding:42px 0}.entry-panel{padding:22px 18px}}
[hidden]{display:none!important}
@media(max-width:680px){.proof{display:none}.hero-copy h1{font-size:38px}.lead{margin:20px 0 4px}.hero-content{gap:26px}}