:root{--nav-theme:199 89% 48%;--nav-theme-light:187 85% 53%;--nav-theme-lighter:187 85% 60%;--bg:255 255 255;--bg-alt:244 248 250;--text:15 23 42;--text-muted:71 85 105;--border:226 232 240;--maxw:1080px;--radius:14px}@media (prefers-color-scheme:dark){:root{--nav-theme:187 85% 53%;--nav-theme-light:187 85% 60%;--nav-theme-lighter:187 85% 68%;--bg:8 12 20;--bg-alt:15 23 42;--text:226 232 240;--text-muted:148 163 184;--border:30 41 59}}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;overflow-x:clip}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{padding:56px 0 48px;background:radial-gradient(1200px 500px at 80% -10%,hsl(var(--nav-theme)/.18),transparent 60%),rgb(var(--bg));border-bottom:1px solid rgb(var(--border))}.hero-bg{position:relative;padding:96px 0 88px;background-size:cover;background-position:50%;color:#fff;border-bottom:none}.hero-bg:before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,12,20,.94),rgba(8,12,20,.86) 45%,rgba(8,12,20,.55))}.hero-bg>.container{position:relative;z-index:1}.hero-bg .eyebrow,.hero-bg h1,.hero.hero-bg .desc,.hero.hero-bg .stat,.hero.hero-bg .stat b{color:#fff}.hero-bg .btn-ghost{background:hsla(0,0%,100%,.12);border-color:hsla(0,0%,100%,.35);color:#fff}.hero-bg .btn-ghost:hover{background:hsla(0,0%,100%,.2);border-color:#fff;color:#fff}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;grid-gap:40px;gap:40px;align-items:center}.hero-art{position:relative}.hero-art img{width:100%;border-radius:18px;box-shadow:0 24px 60px hsl(var(--nav-theme)/.25);border:1px solid rgb(var(--border));aspect-ratio:4/3;object-fit:cover}@media (max-width:800px){.hero-grid{grid-template-columns:1fr;gap:28px}.hero-art img{aspect-ratio:16/10}}.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(2.4rem,6vw,4rem);line-height:1.05;font-weight:900;letter-spacing:-.02em;margin-bottom:18px}.hero p.desc{font-size:1.15rem;color:rgb(var(--text-muted));max-width:680px;margin-bottom:26px}.hero-stats{display:flex;flex-wrap:wrap;gap:10px 26px;margin-bottom:30px}.hero-stats .stat{font-size:.92rem;color:rgb(var(--text-muted))}.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:48px 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));max-width:720px;margin-bottom:20px}.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);text-decoration:none}.card-img{height:170px;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:inherit;font-weight:800;color:hsl(var(--nav-theme));margin-right:8px}.about-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:32px;gap:32px;align-items:stretch}.about-art{height:100%}.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}}.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:56px 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 20px}.cta .hero-actions{justify-content:center}.footer{border-top:1px solid rgb(var(--border));background:rgb(var(--bg-alt));padding:48px 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:none;margin:0;padding:40px 0 64px}.guide-header{max-width:760px;margin:0 auto 28px;padding:0 24px}.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{width:100%;max-width:none;margin:0 0 8px;border-radius:0;display:block}.guide-body{max-width:760px;margin:0 auto;padding:0 24px}.prose h2{font-size:1.5rem;font-weight:800;margin:44px 0 14px;padding-bottom:10px;border-bottom:2px solid rgb(var(--text-muted)/.35)}.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))}.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;table-layout:fixed}.prose .col-nowrap{white-space:nowrap}.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{position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:var(--radius);border:1px solid rgb(var(--border))}.video iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}