:root{--bg:#05080d;--bg2:#0a111b;--fg:#d8e3ee;--muted:#8a9bb0;--acc:#2bf5b0;--acc2:#29b6ff;--mag:#ff3df2;--line:rgba(120,200,255,.14);--glass:rgba(14,24,38,.55);--r:16px;
--mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;--sans:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:radial-gradient(1200px 600px at 80% -10%,rgba(41,182,255,.12),transparent 60%),radial-gradient(900px 500px at -10% 30%,rgba(43,245,176,.08),transparent 60%),var(--bg);color:var(--fg);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--acc);text-decoration:none}a:hover{text-decoration:underline}
.mono{font-family:var(--mono)}
#bg{position:fixed;inset:0;width:100%;height:100%;z-index:-2;opacity:.55}
.scanlines{position:fixed;inset:0;z-index:-1;pointer-events:none;background:repeating-linear-gradient(0deg,rgba(255,255,255,.018) 0 1px,transparent 1px 3px)}
.wrap{max-width:1140px;margin:0 auto;padding:0 22px}
section{padding:90px 0}
h1,h2,h3{line-height:1.15;margin:0 0 .5em;color:#fff}
h1{font-size:clamp(2.5rem,6.4vw,4.6rem);letter-spacing:-.03em}
h2{font-size:clamp(1.8rem,3.6vw,2.6rem);letter-spacing:-.02em}
h3{font-size:1.2rem}
.eyebrow{color:var(--acc);font-size:.85rem;letter-spacing:.08em;text-transform:lowercase;margin:0 0 .8em;text-shadow:0 0 12px rgba(43,245,176,.5)}
.lead{font-size:1.15rem;color:var(--muted);max-width:36em}
.muted{color:var(--muted)}
/* nav */
.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:14px max(22px,calc((100vw - 1140px)/2 + 22px));background:rgba(5,8,13,.6);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font:700 1.1rem var(--mono)}.brand:hover{text-decoration:none}
.brand b{color:var(--acc);font-weight:700;margin-left:.35em;text-shadow:0 0 10px rgba(43,245,176,.6)}
.nav nav{display:flex;gap:26px;align-items:center}
.nav nav a{color:var(--fg);font-size:.95rem}.nav nav a:hover{color:var(--acc);text-decoration:none}
.btn-sm{border:1px solid var(--acc);padding:6px 14px;border-radius:999px;color:var(--acc)!important;box-shadow:0 0 14px rgba(43,245,176,.25) inset}
.menu-btn{display:none;background:none;border:0;width:38px;height:38px;cursor:pointer;padding:8px}
.menu-btn span{display:block;height:2px;background:var(--acc);margin:6px 0;transition:.3s}
/* buttons */
.cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.btn{display:inline-block;padding:13px 24px;border-radius:12px;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#02110b;font-weight:700;box-shadow:0 0 24px rgba(43,245,176,.35),0 0 60px rgba(41,182,255,.15);transition:transform .2s,box-shadow .2s}
.btn:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 0 32px rgba(43,245,176,.55),0 0 80px rgba(41,182,255,.25)}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--line);box-shadow:none}.btn.ghost:hover{border-color:var(--acc);color:var(--acc)}
.btn.big{font-size:clamp(1.1rem,3vw,1.5rem);padding:16px 30px;margin-top:10px}
/* hero */
.hero{min-height:calc(100vh - 64px);display:flex;align-items:center;padding:60px 0}
.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;align-items:center;width:100%}
/* glitch */
.glitch{position:relative;display:inline-block;color:#fff;text-shadow:0 0 18px rgba(43,245,176,.55)}
.glitch::before,.glitch::after{content:attr(data-text);position:absolute;left:0;top:0;width:100%;overflow:hidden}
.glitch::before{color:var(--mag);transform:translate(-2px,0);clip-path:inset(0 0 60% 0);animation:g1 3.2s infinite steps(1);mix-blend-mode:screen;opacity:.8}
.glitch::after{color:var(--acc2);transform:translate(2px,0);clip-path:inset(55% 0 0 0);animation:g2 2.7s infinite steps(1);mix-blend-mode:screen;opacity:.8}
@keyframes g1{0%,86%,100%{clip-path:inset(0 0 100% 0);transform:none}88%{clip-path:inset(10% 0 60% 0);transform:translate(-4px,-1px)}91%{clip-path:inset(40% 0 30% 0);transform:translate(3px,1px)}94%{clip-path:inset(70% 0 5% 0);transform:translate(-2px,0)}}
@keyframes g2{0%,80%,100%{clip-path:inset(100% 0 0 0);transform:none}82%{clip-path:inset(60% 0 10% 0);transform:translate(4px,1px)}85%{clip-path:inset(20% 0 55% 0);transform:translate(-3px,-1px)}88%{clip-path:inset(5% 0 80% 0);transform:translate(2px,0)}}
/* glass */
.glass{background:var(--glass);border:1px solid var(--line);border-radius:var(--r);backdrop-filter:blur(12px) saturate(140%);-webkit-backdrop-filter:blur(12px) saturate(140%);box-shadow:0 10px 40px rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.05)}
/* terminal */
.term{overflow:hidden;box-shadow:0 0 0 1px rgba(43,245,176,.15),0 0 50px rgba(43,245,176,.12),0 20px 60px rgba(0,0,0,.5)}
.term-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--line);background:rgba(0,0,0,.25)}
.term-bar i{width:11px;height:11px;border-radius:50%;background:#ff5f57}.term-bar i:nth-child(2){background:#febc2e}.term-bar i:nth-child(3){background:#28c840}
.term-bar span{margin-left:10px;color:var(--muted);font-size:.8rem}
.term pre{margin:0;padding:20px;min-height:310px;font-size:.88rem;line-height:1.7;color:#bfe9d8;white-space:pre-wrap;word-break:break-word}
.term .p{color:var(--acc)}.term .w{color:#febc2e}.term .c{color:#ff6b8b}.term .o{color:var(--acc2)}.term .d{color:var(--muted)}
.cursor{display:inline-block;width:.6em;height:1.1em;background:var(--acc);vertical-align:-.15em;animation:blink 1s steps(1) infinite;box-shadow:0 0 8px var(--acc)}
@keyframes blink{50%{opacity:0}}
/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:34px}
.card{padding:28px;position:relative;transition:transform .35s,border-color .35s,box-shadow .35s}
.card::before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:linear-gradient(135deg,rgba(43,245,176,.6),transparent 40%,transparent 60%,rgba(41,182,255,.6));-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .35s;pointer-events:none}
.card:hover{transform:translateY(-6px);box-shadow:0 0 40px rgba(43,245,176,.15),0 20px 50px rgba(0,0,0,.45)}.card:hover::before{opacity:1}
.ico{width:52px;height:52px;display:grid;place-items:center;border-radius:12px;background:rgba(43,245,176,.08);border:1px solid rgba(43,245,176,.35);color:var(--acc);font-weight:700;margin-bottom:18px;text-shadow:0 0 10px var(--acc)}
.card p{color:var(--muted)}
.card ul{list-style:none;padding:0;margin:16px 0 0}
.card li{padding:6px 0 6px 22px;position:relative;font-size:.94rem;border-top:1px dashed var(--line)}
.card li::before{content:">";position:absolute;left:2px;color:var(--acc);font-family:var(--mono)}
.deliver{margin-top:26px;padding:28px}
.deliver h3{color:var(--acc);font-size:1rem}
.deliver-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.deliver-grid b{display:block;color:#fff;margin-bottom:4px}.deliver-grid span{color:var(--muted);font-size:.93rem}
/* steps */
.steps{list-style:none;padding:0;margin:34px 0 0;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:s}
.steps li{padding:22px;position:relative}
.steps .n{display:block;font-size:2rem;font-weight:700;color:transparent;-webkit-text-stroke:1px var(--acc);margin-bottom:8px;text-shadow:0 0 18px rgba(43,245,176,.35)}
.steps h3{font-size:1.05rem}.steps p{color:var(--muted);font-size:.93rem;margin:0}
.principles{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.chip{font-size:.8rem;padding:6px 12px;border-radius:999px;border:1px solid var(--line);color:var(--acc);background:rgba(43,245,176,.05)}
.about{padding:30px;max-width:860px}.about p{color:#c4d1de}.about p:last-child{margin-bottom:0}
/* contact */
.contact-box{text-align:center;padding:60px 26px;background:linear-gradient(135deg,rgba(43,245,176,.08),rgba(41,182,255,.08)),var(--glass)}
.contact-box p{color:var(--muted);max-width:34em;margin:0 auto 18px}
.foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:30px 22px 40px;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem}
.foot a{color:var(--muted)}.foot a:hover{color:var(--acc)}
/* legal */
.legal{padding-top:60px;padding-bottom:60px;max-width:780px}.legal h2{font-size:1.3rem;margin-top:1.6em}.legal p{color:#c4d1de}
.center{text-align:center;padding-top:20vh}
/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.no-js .reveal{opacity:1;transform:none}
/* responsive */
@media (max-width:980px){.hero-grid{grid-template-columns:1fr}.cards{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr}.deliver-grid{grid-template-columns:1fr 1fr}}
@media (max-width:720px){
 section{padding:64px 0}.hero{min-height:auto;padding:40px 0 20px}
 .menu-btn{display:block}
 .nav #menu{position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:rgba(5,8,13,.96);border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .35s}
 .nav #menu a{padding:14px 22px;width:100%;border-top:1px solid var(--line)}.nav #menu .btn-sm{border-radius:0;border:0;border-top:1px solid var(--line);box-shadow:none}
 .nav.open #menu{max-height:360px}
 .nav.open .menu-btn span:first-child{transform:translateY(4px) rotate(45deg)}.nav.open .menu-btn span:last-child{transform:translateY(-4px) rotate(-45deg)}
 .steps,.deliver-grid{grid-template-columns:1fr}.term pre{min-height:260px;font-size:.8rem}
 .glass{backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
}
@media (prefers-reduced-motion:reduce){
 *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
 .reveal{opacity:1;transform:none}.glitch::before,.glitch::after{display:none}
}
/* i18n */
html.i18n-pending body{visibility:hidden}
html.lang-zh body{font-family:var(--sans),"PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Noto Sans SC","Microsoft YaHei",sans-serif}
html.lang-zh .lead,html.lang-zh p,html.lang-zh li{line-height:1.8}
html.lang-zh h1{letter-spacing:0;font-size:clamp(2.3rem,5.6vw,4.2rem)}
html.lang-zh .eyebrow{letter-spacing:.04em}
.nav-right{display:flex;align-items:center;gap:22px}
.lang-toggle{display:inline-flex;align-items:center;gap:6px;background:rgba(43,245,176,.06);border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:6px 12px;font-size:.82rem;cursor:pointer;transition:border-color .2s,box-shadow .2s}
.lang-toggle:hover{border-color:var(--acc);box-shadow:0 0 14px rgba(43,245,176,.25)}
.lang-toggle i{font-style:normal;opacity:.4}
.lang-toggle .on{color:var(--acc);text-shadow:0 0 8px rgba(43,245,176,.7)}
.lang-toggle:focus-visible,.menu-btn:focus-visible,a:focus-visible{outline:2px solid var(--acc);outline-offset:3px}
@media (max-width:720px){.nav-right{gap:10px}.lang-toggle{padding:5px 10px}}