:root{--bg:#fff;--fg:#111;--mut:#86868b;--line:rgba(0,0,0,.1);--card:rgba(0,0,0,.03);--g1:#a5b4fc;--g2:#f9a8d4;--ok:#16a34a;--err:#dc2626}
@media(prefers-color-scheme:dark){:root{--bg:#000;--fg:#f5f5f7;--mut:#8e8e93;--line:rgba(255,255,255,.12);--card:rgba(255,255,255,.05);--g1:#4f46e5;--g2:#db2777;--ok:#4ade80;--err:#f87171}}
*{margin:0;box-sizing:border-box}html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display",Inter,"PingFang SC","Noto Sans CJK SC",sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
nav{position:fixed;top:0;left:0;right:0;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:18px 32px;font-size:14px;backdrop-filter:blur(20px);background:color-mix(in srgb,var(--bg) 70%,transparent)}
nav b{font-weight:700;font-size:17px}nav div a{margin-left:24px;color:var(--mut)}nav div a:hover{color:var(--fg)}
.glow{position:absolute;left:50%;top:30vh;width:900px;height:900px;margin-left:-450px;border-radius:50%;background:conic-gradient(var(--g1),var(--g2),var(--g1));filter:blur(140px);opacity:.45;animation:spin 16s linear infinite;z-index:-1;pointer-events:none}
.hero{position:relative;min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:100px 24px 60px}
.k{font-size:13px;letter-spacing:.3em;color:var(--mut)}
h1{word-break:keep-all;font-size:clamp(56px,10vw,128px);font-weight:800;letter-spacing:-.05em;line-height:1.05;margin:18px 0}
.sub{font-size:clamp(17px,2vw,22px);color:var(--mut)}
.in{animation:in 1.4s ease both}.d1{animation-delay:.3s}.d2{animation-delay:.6s}
form{margin-top:44px;width:min(600px,100%)}
.f{display:flex;align-items:center;background:color-mix(in srgb,var(--bg) 55%,transparent);backdrop-filter:blur(24px);border:1px solid var(--line);border-radius:20px;padding:8px;font-size:20px;transition:border-color .3s}
.f:focus-within{border-color:color-mix(in srgb,var(--fg) 35%,transparent)}
.f input{flex:1;min-width:0;border:0;background:none;color:var(--fg);font:inherit;padding:12px 4px 12px 16px;text-align:right;outline:0}
.f span{color:var(--mut);padding-right:14px}
button{border:0;border-radius:13px;background:var(--fg);color:var(--bg);padding:14px 26px;font-size:16px;font-weight:600;cursor:pointer;transition:transform .2s}button:hover{transform:scale(1.03)}
.msg{min-height:24px;margin-top:14px;font-size:14px;color:var(--mut)}.msg.ok{color:var(--ok)}.msg.err{color:var(--err)}
section{max-width:1080px;margin:0 auto;padding:120px 24px;text-align:center}
h2{font-size:clamp(36px,5vw,56px);font-weight:700;letter-spacing:-.03em}
.lead{color:var(--mut);font-size:19px;margin-top:12px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:56px;text-align:left}
.card{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:28px}
.card h3{font-size:22px;margin-bottom:6px}.card code{font-size:13px;color:var(--mut)}.card p{margin-top:16px;color:var(--mut);font-size:15px;line-height:1.6}
.flow{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-top:56px}
.flow div{border:1px solid var(--line);border-radius:999px;padding:16px 28px;font-size:20px;font-weight:600}
.flow i{font-style:normal;color:var(--mut);font-weight:400;margin-right:8px}
.tag{display:inline-block;font-size:12px;border:1px solid var(--line);border-radius:6px;padding:2px 8px;color:var(--mut);margin-left:8px;vertical-align:middle;letter-spacing:0}
.price{grid-template-columns:repeat(3,1fr)}.price .card{text-align:center}.price b{display:block;font-size:44px;margin:14px 0 4px;letter-spacing:-.03em}
footer{border-top:1px solid var(--line);padding:32px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--mut);max-width:1080px;margin:0 auto}footer a{margin-left:20px}footer a:hover{color:var(--fg)}
.reveal{opacity:0;filter:blur(12px);transform:translateY(30px);transition:all 1s cubic-bezier(.2,.7,.2,1)}.reveal.on{opacity:1;filter:none;transform:none}
.doc{max-width:720px;margin:0 auto;padding:140px 24px 80px;line-height:1.8}.doc h1{font-size:48px}.doc h2{font-size:22px;margin:32px 0 8px}.doc p{color:var(--mut)}
.draft{background:#fef3c7;color:#92400e;padding:12px 16px;border-radius:10px;font-size:14px}
@keyframes in{from{opacity:0;filter:blur(20px);transform:translateY(12px)}}@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:800px){.grid,.price{grid-template-columns:1fr 1fr}nav div a:not(:last-child){display:none}.glow{width:500px;height:500px;margin-left:-250px}}
@media(max-width:520px){h1{font-size:12.5vw}.k{font-size:11px;letter-spacing:.15em}.grid,.price{grid-template-columns:1fr}.f{flex-wrap:wrap;font-size:18px}.f input{text-align:left}.f button{width:100%;margin-top:6px}section{padding:80px 20px}footer{flex-direction:column}footer a{margin:0 16px 0 0}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}.reveal{opacity:1;filter:none;transform:none}html{scroll-behavior:auto}}