:root{--bg:#0e0d0c;--card:#1c1a18;--raise:#2a2724;--ink:#f2ede6;--soft:#c9c1b7;--muted:#948c84;--line:rgba(242,237,230,.10);--gold:#dcc48e;--sky:#9fb9d6;--mint:#9ed0c2;--display:"Bricolage Grotesque",-apple-system,"PingFang SC",sans-serif;--body:Figtree,-apple-system,"PingFang SC","Helvetica Neue",sans-serif;--mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 var(--body);overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--sky)}a:hover{color:#c9daec}
img{max-width:100%;display:block}
.wrap{max-width:1160px;margin:0 auto;padding:0 32px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:16px;background:var(--ink);color:var(--bg);padding:8px 12px;border-radius:8px;z-index:10}

/* header */
.top{position:relative;z-index:2;display:flex;align-items:center;gap:24px;flex-wrap:wrap;padding-top:22px;padding-bottom:22px}
.brand{display:flex;align-items:center;gap:10px;font:800 22px var(--display);color:var(--ink);text-decoration:none}
.brand img{width:30px;height:30px;border-radius:8px}
.nav{display:flex;gap:20px;flex:1;flex-wrap:wrap;font-size:15px}
.nav a{color:#a39b92;text-decoration:none}.nav a:hover{color:var(--ink)}
.btn{display:inline-block;text-decoration:none;font-weight:700;border-radius:26px;padding:14px 24px}
.btn-light{background:var(--ink);color:#121110;padding:10px 18px;font-size:15px}
.btn-gold{background:linear-gradient(90deg,var(--gold),#e9d6a8);color:#121110;font-weight:800}
.btn-ghost{border:1px solid rgba(242,237,230,.2);color:var(--ink);font-weight:600}
.btn:hover{filter:brightness(1.06);color:inherit}

/* hero */
.hero-bg{position:relative}
.grid-bg{position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(242,237,230,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(242,237,230,.05) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%)}
.glow{position:absolute;pointer-events:none;border-radius:50%;animation:glow 9s ease-in-out infinite alternate}
.glow-a{left:10%;top:-10%;width:60%;height:80%;background:radial-gradient(circle,rgba(159,185,214,.22),transparent 60%)}
.glow-b{right:0;top:20%;width:45%;height:70%;background:radial-gradient(circle,rgba(220,196,142,.16),transparent 60%);animation-delay:-4s}
@keyframes glow{from{transform:translate(-4%,-2%) scale(1)}to{transform:translate(4%,3%) scale(1.12)}}
.hero{position:relative;z-index:1;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:48px;align-items:center;padding-top:56px;padding-bottom:40px}
.hero-copy{display:flex;flex-direction:column;gap:22px}
.pill{display:inline-flex;align-items:center;gap:10px;align-self:flex-start;padding:7px 14px;border-radius:20px;border:1px solid rgba(242,237,230,.14);font:500 13px var(--mono);color:var(--soft)}
.dot{width:8px;height:8px;border-radius:4px;background:var(--mint);animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(158,208,194,.5)}50%{box-shadow:0 0 0 8px rgba(158,208,194,0)}}
h1{margin:0;font:800 64px/1.0 var(--display);letter-spacing:-.01em}
.grad{background:linear-gradient(90deg,var(--gold),var(--sky));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin:0;font-size:19px;color:var(--soft)}
.ctas{display:flex;gap:12px;flex-wrap:wrap}
.price{font-size:14px;color:var(--muted);margin:0}

/* demo */
.demo{position:relative;display:flex;flex-direction:column;gap:16px}
.scan-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 30px 60px rgba(0,0,0,.45);overflow:hidden}
.file{display:flex;justify-content:space-between;font:500 12px var(--mono);color:var(--muted)}
.pass{position:relative;margin-top:12px;background:var(--ink);color:#121110;border-radius:14px;padding:16px 18px;display:flex;flex-direction:column;gap:10px}
.pass-k{font-size:11px;font-weight:700;letter-spacing:.08em;color:#2f5e86}
.route{display:flex;justify-content:space-between;align-items:baseline;font:800 34px var(--display)}
.route span:nth-child(2){color:#5e584f;font:400 20px var(--body)}
.pass-row{display:flex;gap:22px;font-size:13px}
.bars{height:34px;border-radius:3px;opacity:.85;background:repeating-linear-gradient(90deg,#121110 0 2px,transparent 2px 5px,#121110 5px 6px,transparent 6px 9px)}
.scan{position:absolute;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--mint),transparent);box-shadow:0 0 18px 4px rgba(158,208,194,.55);animation:scan 3.2s cubic-bezier(.6,0,.4,1) infinite}
@keyframes scan{0%{top:6%;opacity:0}10%{opacity:1}80%{opacity:1}100%{top:92%;opacity:0}}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{padding:6px 12px;border-radius:14px;font:500 13px var(--mono);opacity:0;animation:chip 6.4s ease-out infinite}
.chip-sky{background:rgba(159,185,214,.14);color:#c9daec}
.chip-gold{background:rgba(220,196,142,.14);color:#e9d6a8}
.chip-mint{background:rgba(158,208,194,.14);color:#bfe3d9}
.chip:nth-child(2){animation-delay:.4s}.chip:nth-child(3){animation-delay:.8s}.chip:nth-child(4){animation-delay:1.2s}
@keyframes chip{0%,8%{opacity:0;transform:translateY(8px) scale(.96)}14%,86%{opacity:1;transform:none}96%,100%{opacity:0;transform:translateY(-4px)}}
.chat{align-self:flex-end;width:82%;display:flex;flex-direction:column;gap:10px}
.q{align-self:flex-end;background:var(--raise);border-radius:18px 18px 4px 18px;padding:10px 14px;font-size:15px}
.type{display:inline-block;overflow:hidden;white-space:nowrap;vertical-align:bottom;border-right:2px solid var(--gold);width:0;animation:type 6.4s steps(18,end) infinite,caret .8s step-end infinite}
.type-zh{animation-name:typeZh,caret}
@keyframes type{0%,6%{width:0}30%,92%{width:18ch}100%{width:0}}
@keyframes typeZh{0%,6%{width:0}30%,92%{width:5em}100%{width:0}}
@keyframes caret{50%{border-color:transparent}}
.a{background:linear-gradient(180deg,rgba(159,185,214,.18),rgba(159,185,214,.08));border:1px solid rgba(159,185,214,.25);border-radius:18px 18px 18px 4px;padding:12px 14px;font-size:15px;line-height:1.45;opacity:0;animation:answer 6.4s ease-out infinite}
.a small{display:block;color:var(--muted);font-size:12px;margin-top:4px}
@keyframes answer{0%,38%{opacity:0;transform:translateY(10px)}46%,90%{opacity:1;transform:none}100%{opacity:0}}

/* marquee */
.ticker{position:relative;border-top:1px solid rgba(242,237,230,.08);border-bottom:1px solid rgba(242,237,230,.08);padding:16px 0;overflow:hidden}
.marquee{display:flex;gap:48px;width:max-content;font:500 14px var(--mono);color:var(--muted);animation:marquee 28s linear infinite;margin:0;padding:0;list-style:none}
@keyframes marquee{to{transform:translateX(-50%)}}

/* sections */
section{scroll-margin-top:24px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,270px),1fr));gap:18px;padding-top:64px;padding-bottom:24px}
.card{background:linear-gradient(180deg,rgba(242,237,230,.06),rgba(242,237,230,.02));border:1px solid var(--line);border-radius:22px;padding:26px;display:flex;flex-direction:column;gap:10px;transition:transform .3s ease,border-color .3s ease}
.card:hover{transform:translateY(-4px);border-color:rgba(220,196,142,.45)}
.k{font:500 12px var(--mono)}
.k-gold{color:var(--gold)}.k-sky{color:var(--sky)}.k-mint{color:var(--mint)}
h2{margin:0;font:800 36px/1.1 var(--display)}
h3{margin:0;font:800 26px/1.15 var(--display)}
.card p,.faq p{margin:0;font-size:15px;color:var(--soft)}
.shots{display:flex;gap:24px;justify-content:center;align-items:flex-start;flex-wrap:wrap;padding-top:32px;padding-bottom:72px}
.shots img{width:230px;height:auto;border-radius:22px;box-shadow:0 30px 60px rgba(0,0,0,.5);animation:float 7s ease-in-out infinite}
.shots img:nth-child(2){margin-top:40px;animation-delay:-2.3s}.shots img:nth-child(3){animation-delay:-4.6s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
.uses{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:16px;margin-top:18px}
.use{border-top:2px solid var(--line);padding-top:12px}
.use b{display:block;font-size:17px;margin-bottom:4px}.use span{color:var(--soft);font-size:15px}
.privacy{border-radius:28px;padding:40px;background:radial-gradient(120% 140% at 0% 0%,rgba(158,208,194,.16),transparent 50%),var(--card);border:1px solid var(--line);display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:24px}
.privacy ul{margin:0;padding-left:20px;color:var(--soft);font-size:16px}
.block{padding-bottom:56px}
.faq{display:flex;flex-direction:column;gap:12px}
.faq details{background:linear-gradient(180deg,rgba(242,237,230,.06),rgba(242,237,230,.02));border:1px solid var(--line);border-radius:18px;padding:18px 22px}
.faq summary{cursor:pointer;font-weight:700;font-size:17px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq details[open] summary{margin-bottom:8px}
.guides{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.guides a{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:10px 14px;text-decoration:none;color:var(--ink);font-size:15px}
.guides a:hover{border-color:rgba(220,196,142,.45)}
footer{border-top:1px solid rgba(242,237,230,.08);padding-top:24px;padding-bottom:40px;display:flex;gap:20px;flex-wrap:wrap;font-size:14px;color:var(--muted)}

/* article pages */
.article{max-width:760px;margin:0 auto;padding:24px 24px 64px}
.article h1{font-size:44px;line-height:1.08;margin:24px 0 16px}
.article h2{font-size:28px;margin:40px 0 12px}
.article h3{font-size:20px;margin:24px 0 8px}
.article p,.article li{color:var(--soft);font-size:17px;line-height:1.7}
.article .answer{background:linear-gradient(180deg,rgba(220,196,142,.08),rgba(220,196,142,.03)),var(--card);border:1px solid rgba(220,196,142,.28);border-radius:14px;padding:18px 20px;color:var(--ink)}
.article table{width:100%;border-collapse:collapse;margin:16px 0;font-size:15px}
.article th,.article td{border-bottom:1px solid var(--line);padding:10px 8px;text-align:left;vertical-align:top;color:var(--soft)}
.article th{color:var(--ink)}
.meta{color:var(--muted);font-size:14px}

.film{padding-top:24px;padding-bottom:8px}.film-v{display:block;width:100%;max-width:1100px;margin:0 auto;aspect-ratio:16/9;height:auto;border-radius:24px;border:1px solid var(--line);background:#000;box-shadow:0 40px 80px rgba(0,0,0,.5);cursor:pointer}
@media (max-width:640px){.wrap{padding:0 16px}.top{gap:12px 16px}.brand{flex:1}.nav{order:3;flex-basis:100%;gap:16px}.btn-light{padding:8px 14px;font-size:14px}.shots{gap:14px}.shots img:nth-child(2){margin-top:28px}h1{font-size:44px}h2{font-size:30px}.shots img{width:44%}.shots img:nth-child(3){display:none}.privacy{padding:28px}.article h1{font-size:34px}.chat{width:100%}}
@media (prefers-reduced-motion:reduce){.glow,.scan,.chip,.type,.a,.shots img,.marquee,.dot{animation:none!important}.chip,.a{opacity:1;transform:none}.type{width:auto;border:0}.scan{display:none}.marquee{flex-wrap:wrap;gap:16px 32px;width:auto;padding:0 16px}.marquee li[aria-hidden]{display:none}}

/* guides */
.article ul,.article ol{padding-left:22px}
.article li{margin:6px 0}
.article .sources li{font-size:15px}
.guide-list{list-style:none;padding:0!important}
.guide-list li{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 18px;margin:12px 0}
.guide-list a{font:800 20px/1.25 var(--display);color:var(--ink);text-decoration:none}
.guide-list a:hover{color:var(--gold)}
.article table{display:block;overflow-x:auto}