:root{ --bg: #0d0f0c; --surface: #161a13; --surface-alt: #20261b; --text: #f1f5ec; --text-muted: #a5b199; --border: #2c331f; --accent: #a3e635; --accent-2: #22c55e; --on-accent: #0d1206; --r-sm: 0px; --r-md: 2px; --r-lg: 4px; --r-pill: 4px; --shadow: none; --border-style: 1px solid var(--text); --spacing-base: clamp(14px, 1.8vw, 22px); }
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Archivo",system-ui,sans-serif;line-height:1.6;letter-spacing:0}
body[data-lang="zh"] [data-lang-section="en"],body[data-lang="en"] [data-lang-section="zh"],body[data-lang="zh"] .logo-en,body[data-lang="en"] .logo-zh{display:none!important}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.page-shell{min-height:100vh;background:radial-gradient(38% 48% at 100% 0%,color-mix(in oklab,var(--accent) 32%,transparent),transparent),radial-gradient(34% 44% at 0% 100%,color-mix(in oklab,var(--accent-2) 26%,transparent),transparent),var(--bg)}
.site-header{position:sticky;top:0;z-index:10;background:color-mix(in oklab,var(--bg) 88%,transparent);border-bottom:1px solid var(--border);backdrop-filter:blur(16px)}
.nav-wrap{width:min(1180px,calc(100% - var(--spacing-base)*2));margin-inline:auto;display:flex;align-items:center;gap:var(--spacing-base);padding:calc(var(--spacing-base)*.75) 0}
.brand-link{display:flex;align-items:center;gap:calc(var(--spacing-base)*.5);min-width:max-content}
.brand-link img{width:118px;max-height:38px;object-fit:contain}
.nav-lines{display:flex;align-items:center;gap:calc(var(--spacing-base)*.8);flex:1;min-width:0}
.nav-lines a{font-size:.9rem;color:var(--text-muted);font-weight:700}
.nav-lines a:hover,.nav-lines a:focus{color:var(--text)}
.nav-actions{display:flex;align-items:center;gap:calc(var(--spacing-base)*.5)}
.lang-toggle{display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:var(--r-pill);background:var(--surface);padding:3px}
.lang-toggle button{border:0;background:transparent;color:var(--text-muted);font:inherit;font-size:.82rem;font-weight:800;padding:calc(var(--spacing-base)*.25) calc(var(--spacing-base)*.48);border-radius:var(--r-sm);cursor:pointer}
body[data-lang="zh"] .lang-toggle button[data-switch="zh"],body[data-lang="en"] .lang-toggle button[data-switch="en"]{background:var(--accent);color:var(--on-accent)}
.button{display:inline-flex;align-items:center;justify-content:center;gap:calc(var(--spacing-base)*.35);border-radius:var(--r-pill);border:var(--border-style);padding:calc(var(--spacing-base)*.55) calc(var(--spacing-base)*.85);font-weight:800;line-height:1.1;min-height:42px}
.button.primary{background:var(--accent);color:var(--on-accent)}
.button.secondary{background:var(--surface);color:var(--text)}
.button.ghost{border-color:var(--border);background:transparent;color:var(--text)}
.button:hover,.button:focus,.lang-toggle button:focus,a:focus{outline:2px solid var(--accent);outline-offset:2px}
main{overflow:hidden}
.section{position:relative;padding:calc(var(--spacing-base)*3.2) 0}
.section::before{content:"";position:absolute;inset:auto auto 0 0;width:min(34vw,360px);height:min(34vw,360px);background:radial-gradient(circle,color-mix(in oklab,var(--accent-2) 18%,transparent),transparent 70%);pointer-events:none}
.section:nth-of-type(2n)::before{inset:0 0 auto auto;background:radial-gradient(circle,color-mix(in oklab,var(--accent) 18%,transparent),transparent 70%)}
.inner{position:relative;width:min(1180px,calc(100% - var(--spacing-base)*2));margin-inline:auto}
.hero{min-height:690px;display:grid;align-items:center;background:radial-gradient(38% 48% at 100% 0%,color-mix(in oklab,var(--accent) 32%,transparent),transparent),radial-gradient(34% 44% at 0% 100%,color-mix(in oklab,var(--accent-2) 26%,transparent),transparent),var(--bg);border-bottom:1px solid var(--border)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(360px,.98fr);gap:calc(var(--spacing-base)*2.4);align-items:center;padding:calc(var(--spacing-base)*3) 0}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:calc(var(--spacing-base)*.3);border:1px solid var(--border);border-radius:var(--r-pill);background:var(--surface);color:var(--text-muted);padding:calc(var(--spacing-base)*.3) calc(var(--spacing-base)*.55);font-size:.82rem;font-weight:800}
h1,h2,h3{font-family:"Archivo",system-ui,sans-serif;font-weight:700;letter-spacing:0;line-height:1.05;margin:0;color:var(--text)}
h1{font-size:3.35rem;max-width:760px;margin-top:calc(var(--spacing-base)*.85)}
h2{font-size:2.18rem}
h3{font-size:1.1rem}
p{margin:0;color:var(--text-muted)}
.deck{font-size:1.09rem;max-width:690px;margin-top:var(--spacing-base)}
.hero-actions,.badge-row,.inline-actions{display:flex;flex-wrap:wrap;gap:calc(var(--spacing-base)*.55);align-items:center}
.hero-actions{margin-top:calc(var(--spacing-base)*1.3)}
.badge-row{margin-top:calc(var(--spacing-base)*1.1)}
.proof-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:calc(var(--spacing-base)*.65);margin-top:calc(var(--spacing-base)*1.4)}
.proof-item{border-left:var(--border-style);padding:calc(var(--spacing-base)*.45) 0 calc(var(--spacing-base)*.45) calc(var(--spacing-base)*.65)}
.proof-item strong{display:block;font-size:1.18rem}
.proof-item span{display:block;color:var(--text-muted);font-size:.88rem}
.release-board{background:var(--surface);border:var(--border-style);border-radius:var(--r-lg);padding:var(--spacing-base);box-shadow:var(--shadow)}
.release-head{display:flex;justify-content:space-between;gap:var(--spacing-base);align-items:center;padding-bottom:var(--spacing-base);border-bottom:1px solid var(--border)}
.release-head strong{font-size:1.15rem}
.release-meta{color:var(--accent);font-size:.85rem;font-weight:800}
.network-svg{width:100%;height:auto;margin:var(--spacing-base) 0;color:var(--accent)}
.release-row{display:grid;grid-template-columns:1fr auto;gap:var(--spacing-base);align-items:center;padding:calc(var(--spacing-base)*.8) 0;border-top:1px solid var(--border)}
.release-row:first-of-type{border-top:0}
.release-row b{display:block}
.release-row span{display:block;color:var(--text-muted);font-size:.9rem}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:var(--spacing-base);margin-bottom:calc(var(--spacing-base)*1.2)}
.section-head p{max-width:620px}
.single-pricing{display:grid;place-items:center}
.pricing-card{width:min(740px,100%);background:var(--surface);border:var(--border-style);border-radius:var(--r-lg);padding:calc(var(--spacing-base)*1.4)}
.price-line{display:flex;align-items:flex-end;gap:calc(var(--spacing-base)*.5);margin:calc(var(--spacing-base)*.7) 0}
.price-line strong{font-size:3rem;line-height:1;color:var(--accent)}
.price-list,.check-list{display:grid;gap:calc(var(--spacing-base)*.45);padding:0;margin:var(--spacing-base) 0 0;list-style:none}
.price-list li,.check-list li{display:flex;gap:calc(var(--spacing-base)*.45);align-items:flex-start;color:var(--text-muted)}
.icon{width:1.1em;height:1.1em;flex:0 0 auto;color:var(--accent);margin-top:.18em}
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-base)}
.faq-item,.surface-card,.platform-card,.mini-card,.quote-card,.step-card,.glossary-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:var(--spacing-base);box-shadow:var(--shadow)}
.faq-item h3,.surface-card h3,.platform-card h3,.mini-card h3,.quote-card h3,.step-card h3,.glossary-item h3{margin-bottom:calc(var(--spacing-base)*.35)}
.platform-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:calc(var(--spacing-base)*.75)}
.platform-card{display:flex;flex-direction:column;gap:calc(var(--spacing-base)*.65);min-height:230px}
.platform-card .button{margin-top:auto;width:100%}
.platform-top{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-base)}
.platform-icon{width:38px;height:38px;color:var(--accent)}
.bento-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;grid-auto-rows:minmax(190px,auto);gap:var(--spacing-base)}
.bento-grid .surface-card:first-child{grid-row:span 2}
.bento-grid .surface-card:nth-child(4){grid-column:span 2}
.compare-grid,.three-grid,.two-grid{display:grid;gap:var(--spacing-base)}
.compare-grid{grid-template-columns:repeat(2,1fr)}
.three-grid{grid-template-columns:repeat(3,1fr)}
.two-grid{grid-template-columns:repeat(2,1fr)}
.strip-list{display:grid;gap:calc(var(--spacing-base)*.55)}
.strip{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-base);background:var(--surface-alt);border-left:var(--border-style);padding:calc(var(--spacing-base)*.75) var(--spacing-base);border-radius:var(--r-sm)}
.strip span{color:var(--text-muted)}
.scenario{display:grid;grid-template-columns:auto 1fr;gap:calc(var(--spacing-base)*.7);align-items:start}
.scenario svg{width:34px;height:34px;color:var(--accent)}
.cta-band{background:radial-gradient(38% 48% at 100% 0%,color-mix(in oklab,var(--accent) 26%,transparent),transparent),radial-gradient(34% 44% at 0% 100%,color-mix(in oklab,var(--accent-2) 22%,transparent),transparent),var(--surface);border-block:var(--border-style);text-align:center}
.cta-band p{max-width:720px;margin:var(--spacing-base) auto 0}
.cta-band .inline-actions{justify-content:center;margin-top:calc(var(--spacing-base)*1.2)}
.site-footer{background:var(--surface);border-top:var(--border-style);padding:calc(var(--spacing-base)*2.2) 0}
.footer-grid{display:grid;grid-template-columns:1.1fr repeat(4,1fr);gap:calc(var(--spacing-base)*1.2)}
.footer-brand img{width:128px;max-height:42px;object-fit:contain;margin-bottom:var(--spacing-base)}
.footer-group h3{font-size:.95rem;margin-bottom:calc(var(--spacing-base)*.65)}
.footer-group a,.footer-group span{display:block;color:var(--text-muted);font-size:.92rem;margin:calc(var(--spacing-base)*.32) 0}
.footer-group a:hover,.footer-group a:focus{color:var(--text)}
.social-row{display:flex;gap:calc(var(--spacing-base)*.5);margin-top:var(--spacing-base)}
.social-row a{display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--border);border-radius:var(--r-sm);color:var(--text-muted)}
.social-row svg{width:18px;height:18px}
.legal-line{border-top:1px solid var(--border);margin-top:calc(var(--spacing-base)*1.4);padding-top:var(--spacing-base);color:var(--text-muted);font-size:.88rem}
@media (max-width:1040px){.nav-lines{display:none}.hero-grid,.compare-grid,.two-grid{grid-template-columns:1fr}.platform-grid{grid-template-columns:repeat(2,1fr)}.bento-grid,.three-grid{grid-template-columns:1fr}.bento-grid .surface-card:first-child,.bento-grid .surface-card:nth-child(4){grid-row:auto;grid-column:auto}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:720px){.nav-wrap{align-items:flex-start}.nav-actions{margin-left:auto;flex-wrap:wrap;justify-content:flex-end}.brand-link img{width:104px}.hero{min-height:auto}.hero-grid{padding:calc(var(--spacing-base)*2.2) 0}.release-board{margin-top:var(--spacing-base)}h1{font-size:2.35rem}.section-head{display:block}.section-head p{margin-top:calc(var(--spacing-base)*.65)}.proof-strip,.faq-grid,.platform-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.button{width:auto}.hero-actions .button{width:100%}}

/* lvcha-astro: language links (no JS toggle) */
.lang-toggle a{border:0;background:transparent;color:var(--text-muted);font:inherit;font-size:.82rem;font-weight:800;padding:calc(var(--spacing-base)*.25) calc(var(--spacing-base)*.48);border-radius:var(--r-sm);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;line-height:1.1;min-height:calc(var(--spacing-base)*.25 * 2 + 1.1em)}
.lang-toggle a.is-active,.lang-toggle a[aria-current="page"]{background:var(--accent);color:var(--on-accent)}
.lang-toggle a:focus{outline:2px solid var(--accent);outline-offset:2px}

/* logo: keep square assets crisp (not squished into a wide 118px box) */
.brand-link img{width:auto;height:38px;max-width:118px;max-height:38px;object-fit:contain}

/* secondary pages: readable lists / details on dark skin */
.section .inner ul{margin:calc(var(--spacing-base)*.8) 0 0;padding-left:1.2rem;color:var(--text-muted)}
.section .inner li{margin:calc(var(--spacing-base)*.35) 0}
.section .inner details{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:var(--spacing-base);margin:calc(var(--spacing-base)*.55) 0}
.section .inner summary{cursor:pointer;font-weight:700;color:var(--text)}
.section .inner details p{margin-top:calc(var(--spacing-base)*.45)}
.section .inner a{color:var(--accent)}
.section .inner a:hover{color:var(--text)}
.page-prose h1{font-size:clamp(2rem,4vw,2.8rem);margin-top:0;margin-bottom:calc(var(--spacing-base)*.6)}
.page-prose .deck{margin-top:0}