:root{--nav-theme:268 72% 58%;--nav-theme-light:268 70% 64%;--nav-theme-lighter:268 68% 72%;--bg:14 11 26;--bg-alt:21 17 38;--text:232 226 246;--text-muted:152 143 174;--border:42 34 64;--maxw:1080px;--radius:14px}@media (prefers-color-scheme:dark){:root{--nav-theme:268 74% 62%;--nav-theme-light:268 72% 68%;--nav-theme-lighter:268 70% 76%;--bg:10 8 20;--bg-alt:17 13 32;--text:234 228 248;--text-muted:156 147 180;--border:40 32 62}}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{background:rgb(var(--bg));color:rgb(var(--text));font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;line-height:1.65;font-size:16px}a{color:hsl(var(--nav-theme));text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;border-radius:var(--radius)}.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}.nav{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:rgb(var(--bg)/.9);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid rgb(var(--border))}.nav-inner{max-width:var(--maxw);margin:0 auto;padding:12px 24px;gap:20px}.nav-inner,.nav-logo{display:flex;align-items:center}.nav-logo{font-weight:800;font-size:1.15rem;color:rgb(var(--text));gap:8px}.nav-logo .dot{width:10px;height:10px;border-radius:50%;background:hsl(var(--nav-theme));display:inline-block}.nav-links{margin-left:auto;display:flex;gap:18px;align-items:center;flex-wrap:wrap}.nav-links a{color:rgb(var(--text-muted));font-weight:500;font-size:.95rem}.nav-links a:hover{color:hsl(var(--nav-theme))}.hero{position:relative;min-height:88vh;display:flex;align-items:center;overflow:hidden;border-bottom:1px solid rgb(var(--border))}.hero-bg{background-size:cover;background-position:50%}.hero-bg,.hero-overlay{position:absolute;inset:0}.hero-overlay{background:radial-gradient(1000px 520px at 80% 12%,hsl(var(--nav-theme)/.16),transparent 60%),linear-gradient(180deg,rgba(10,14,28,.28) 0,rgba(10,14,28,.55) 55%,rgba(10,14,28,.94) 100%)}.hero-content{position:relative;z-index:1;padding-top:112px;padding-bottom:96px}@media (max-width:800px){.hero{min-height:72vh}.hero-content{padding-top:72px;padding-bottom:64px}}.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:hsl(var(--nav-theme));margin-bottom:14px}.hero h1{font-size:clamp(2.8rem,7vw,5rem);line-height:1.02;font-weight:900;letter-spacing:-.02em;margin-bottom:20px;color:rgb(var(--text));text-shadow:0 2px 30px rgba(10,14,28,.6)}.hero p.desc{font-size:1.2rem;color:rgba(224,231,244,.86);max-width:680px;margin-bottom:28px}.hero-stats{display:flex;flex-wrap:wrap;gap:10px 26px;margin-bottom:32px}.hero-stats .stat{font-size:.92rem;color:rgba(224,231,244,.75)}.hero-stats .stat b{color:rgb(var(--text));font-weight:700}.hero-actions{display:flex;flex-wrap:wrap;gap:12px}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;font-weight:700;font-size:.98rem;cursor:pointer;border:1px solid transparent;transition:transform .12s ease,background .15s ease}.btn:hover{transform:translateY(-1px);text-decoration:none}.btn-primary{background:hsl(var(--nav-theme));color:#fff}.btn-primary:hover{background:hsl(var(--nav-theme-light))}.btn-ghost{border-color:rgb(var(--border));color:rgb(var(--text));background:rgb(var(--bg-alt))}.btn-ghost:hover{border-color:hsl(var(--nav-theme));color:hsl(var(--nav-theme))}.section{padding:64px 0}.section-alt{background:rgb(var(--bg-alt))}.section h2{font-size:1.9rem;font-weight:800;letter-spacing:-.01em;margin-bottom:12px}.section .lead{color:rgb(var(--text-muted));max-width:720px;margin-bottom:32px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));grid-gap:18px;gap:18px}.card{background:rgb(var(--bg));border:1px solid rgb(var(--border));border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .12s ease,border-color .15s ease,box-shadow .15s ease}.card:hover{transform:translateY(-3px);border-color:hsl(var(--nav-theme));box-shadow:0 12px 30px hsl(var(--nav-theme)/.12)}.card-img{height:140px;background-size:cover;background-position:50%;border-bottom:1px solid rgb(var(--border))}.card-body{padding:18px 20px 22px}.card h3{font-size:1.15rem;font-weight:700;margin-bottom:8px}.card p{color:rgb(var(--text-muted));font-size:.95rem}.card .num{font-size:.8rem;font-weight:800;color:hsl(var(--nav-theme));letter-spacing:.05em}.cards-compact{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}.card-question{flex-direction:row;align-items:center}.card-question .card-body{padding:16px 18px}.card-question h3{font-size:1rem;margin:0}.card-question h3:before{content:"?";display:inline-block;width:20px;height:20px;margin-right:8px;border-radius:50%;background:hsl(var(--nav-theme)/.15);color:hsl(var(--nav-theme));font-weight:900;text-align:center;line-height:20px;font-size:.85rem}.updates-banner{display:flex;align-items:center;gap:16px;padding:16px 20px;border:1px solid rgb(var(--border));border-radius:var(--radius);background:rgb(var(--bg-alt))}.updates-version{font-weight:800;color:hsl(var(--nav-theme));white-space:nowrap;padding:4px 12px;border-radius:999px;background:hsl(var(--nav-theme)/.12)}.updates-banner p{margin:0;color:rgb(var(--text-muted));font-size:.95rem}@media (max-width:800px){.updates-banner{flex-direction:column;align-items:flex-start;gap:8px}}.searchbox{position:relative;max-width:560px;margin:24px auto 0}.searchbox-input{display:flex;align-items:center;gap:10px;padding:13px 18px;background:rgb(var(--bg-alt));border:1px solid rgb(var(--border));border-radius:999px;color:rgb(var(--text-muted))}.searchbox-input input{flex:1 1;background:none;border:none;outline:none;color:rgb(var(--text));font-size:1rem}.searchbox-input input::placeholder{color:rgb(var(--text-muted))}.searchbox-dropdown{position:absolute;top:calc(100% + 8px);left:0;right:0;background:rgb(var(--bg-alt));border:1px solid rgb(var(--border));border-radius:12px;overflow:hidden;z-index:30;box-shadow:0 16px 40px rgba(0,0,0,.35)}.searchbox-item{display:block;padding:12px 18px;font-size:.95rem;color:rgb(var(--text));border-bottom:1px solid rgb(var(--border))}.searchbox-item:last-child{border-bottom:none}.searchbox-item:hover{background:hsl(var(--nav-theme)/.08)}.about-grid{display:grid;grid-template-columns:.85fr 1.15fr;grid-gap:44px;gap:44px;align-items:stretch}.about-art{display:flex}.about-art img{width:100%;height:100%;border-radius:16px;box-shadow:0 16px 40px hsl(var(--nav-theme)/.16);border:1px solid rgb(var(--border));object-fit:cover}@media (max-width:800px){.about-grid{grid-template-columns:1fr;gap:24px}.about-art img{height:auto;aspect-ratio:16/10}}.fact-table{width:100%;border-collapse:collapse;margin-top:20px;font-size:.95rem}.fact-table td,.fact-table th{text-align:left;padding:10px 14px;border-bottom:1px solid rgb(var(--border))}.fact-table th{color:rgb(var(--text-muted));font-weight:600;font-size:.85rem;text-transform:uppercase;letter-spacing:.03em}.cta{text-align:center;padding:72px 0}.cta h2{font-size:2.1rem;font-weight:900;margin-bottom:12px}.cta p{color:rgb(var(--text-muted));max-width:640px;margin:0 auto 28px}.cta .hero-actions{justify-content:center}.footer{border-top:1px solid rgb(var(--border));background:rgb(var(--bg-alt));padding:56px 0 32px}.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:32px;gap:32px}.footer h4{font-size:1rem;font-weight:700;margin-bottom:12px}.footer a,.footer p{color:rgb(var(--text-muted));font-size:.92rem}.footer a{display:block;margin-bottom:8px}.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgb(var(--border));color:rgb(var(--text-muted));font-size:.85rem;text-align:center}.guide{max-width:760px;margin:0 auto;padding:48px 24px 80px}.guide-header{margin-bottom:28px}.guide-header .eyebrow{margin-bottom:10px}.guide-header h1{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:900;letter-spacing:-.01em;line-height:1.15}.guide-hero{margin:20px 0 8px;width:100%}.guide-hero--icon{width:96px;height:96px;object-fit:contain;display:block;margin:20px 0 8px;border-radius:12px;border:1px solid rgb(var(--border));background:rgb(var(--bg-alt))}.guide-source{font-size:.85rem;color:rgb(var(--text-muted));margin-top:6px}.prose h2{font-size:1.5rem;font-weight:800;margin:36px 0 14px;padding-bottom:8px;border-bottom:1px solid rgb(var(--border))}.prose h3{font-size:1.2rem;font-weight:700;margin:28px 0 10px}.prose p{margin:12px 0}.prose ol,.prose ul{margin:12px 0;padding-left:24px}.prose li{margin:6px 0}.prose blockquote{border-left:3px solid hsl(var(--nav-theme));padding:10px 16px;margin:18px 0;background:hsl(var(--nav-theme)/.06);border-radius:0 10px 10px 0;color:rgb(var(--text-muted))}.prose blockquote p{margin:0}.prose code{padding:2px 6px;border-radius:6px;font-size:.9em;font-family:SF Mono,Consolas,Liberation Mono,Menlo,monospace}.prose code,.prose pre{background:rgb(var(--bg-alt))}.prose pre{padding:16px;border-radius:10px;overflow-x:auto;margin:16px 0;font-size:.9rem}.prose pre code{background:none;padding:0}.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.95rem}.prose table td,.prose table th{text-align:left;padding:10px 12px;border:1px solid rgb(var(--border))}.prose table th{background:rgb(var(--bg-alt));font-weight:700}.prose table tr:nth-child(2n) td{background:rgb(var(--bg-alt)/.5)}.prose hr{border:none;border-top:1px solid rgb(var(--border));margin:24px 0}.prose img{margin:16px 0}.prose a[href^="/"]{font-weight:500}.nav .lang{position:relative}.nav .lang summary{list-style:none;cursor:pointer;color:rgb(var(--text-muted));font-weight:600;font-size:.9rem;padding:6px 10px;border:1px solid rgb(var(--border));border-radius:8px;-webkit-user-select:none;-moz-user-select:none;user-select:none}.nav .lang summary::-webkit-details-marker{display:none}.nav .lang-list{position:absolute;right:0;top:calc(100% + 6px);background:rgb(var(--bg));border:1px solid rgb(var(--border));border-radius:10px;padding:6px;display:flex;flex-direction:column;min-width:110px;box-shadow:0 12px 30px hsl(var(--nav-theme)/.15)}.nav .lang-list a{padding:7px 10px;border-radius:6px;color:rgb(var(--text-muted));font-size:.9rem}.nav .lang-list a:hover{background:hsl(var(--nav-theme)/.1);color:rgb(var(--text));text-decoration:none}.video-frame{position:relative;width:100%;max-width:860px;aspect-ratio:16/9;border-radius:var(--radius);overflow:hidden;border:1px solid rgb(var(--border));box-shadow:0 20px 50px rgba(10,14,28,.5)}.video-frame iframe{display:block;width:100%;height:100%;border:0}.prose iframe{width:100%;aspect-ratio:16/9;height:auto;border:0;border-radius:var(--radius)}.ad-slot{display:flex;justify-content:center;margin:24px 0}.ad-slot:empty{display:none}