:root{--nav-theme:152 85% 33%;--nav-theme-light:152 65% 45%;--nav-theme-lighter:152 60% 55%;--bg:255 255 255;--bg-alt:245 249 247;--text:31 41 55;--text-muted:107 114 128;--border:229 231 235;--maxw:1080px;--radius:14px}@media (prefers-color-scheme:dark){:root{--bg:255 255 255;--bg-alt:245 249 247;--text:31 41 55;--text-muted:107 114 128;--border:229 231 235}}*{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;display:flex;align-items:center;overflow:hidden;background:radial-gradient(1000px 520px at 82% 8%,hsl(var(--nav-theme)/.1),transparent 60%),linear-gradient(180deg,rgb(var(--bg-alt)) 0,rgb(var(--bg)) 100%);border-bottom:1px solid rgb(var(--border))}.hero-plain{min-height:70vh}.hero-content{position:relative;z-index:1;padding-top:96px;padding-bottom:80px}@media (max-width:800px){.hero-plain{min-height:auto}.hero-content{padding-top:56px;padding-bottom:56px}}.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.08em;color:hsl(var(--nav-theme));margin-bottom:14px}.hero h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.15;font-weight:900;letter-spacing:-.02em;margin-bottom:20px;color:rgb(var(--text))}.hero p.desc{font-size:1.15rem;color:rgb(var(--text-muted));max-width:680px;margin-bottom:28px}.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,.12)}.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(31,41,55,.12)}.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)}.about-copy h2{margin-bottom:16px}.about-copy .lead{margin-bottom:18px}.insights-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:18px;gap:18px}.insights-empty{background:rgb(var(--bg));border:1px dashed rgb(var(--border));border-radius:var(--radius);padding:40px 24px;text-align:center;color:rgb(var(--text-muted))}.insights-empty p:first-child{font-size:1.1rem;font-weight:700;color:rgb(var(--text));margin-bottom:8px}.insight-card{display:block;background:rgb(var(--bg));border:1px solid rgb(var(--border));border-radius:var(--radius);padding:22px 24px;transition:transform .12s ease,border-color .15s ease,box-shadow .15s ease}.insight-card:hover{transform:translateY(-3px);border-color:hsl(var(--nav-theme));box-shadow:0 12px 30px hsl(var(--nav-theme)/.12);text-decoration:none}.insight-card-head{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:10px}.insight-date{font-size:.82rem;color:rgb(var(--text-muted))}.insight-tag{display:inline-block;font-size:.75rem;padding:2px 10px;border-radius:999px;background:hsl(var(--nav-theme)/.1);color:hsl(var(--nav-theme));font-weight:600}.insight-card h3{font-size:1.12rem;font-weight:700;line-height:1.4;margin-bottom:10px}.insight-stats{display:flex;flex-wrap:wrap;gap:8px 18px;margin-bottom:10px;font-size:.88rem;color:rgb(var(--text-muted))}.insight-stats b{color:hsl(var(--nav-theme));font-size:1.05rem;margin-right:2px}.insight-summary{color:rgb(var(--text-muted));font-size:.92rem;line-height:1.65;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.insight-more{color:hsl(var(--nav-theme));font-weight:600;font-size:.9rem}.insight-page{padding-top:56px;padding-bottom:64px;max-width:780px}.insight-header{margin-bottom:36px}.insight-header .insight-date{margin-bottom:10px}.insight-header h1{font-size:clamp(1.6rem,4vw,2.2rem);line-height:1.3;font-weight:900;margin-bottom:14px}.insight-block{margin-bottom:36px}.insight-block h2{font-size:1.35rem;font-weight:800;margin-bottom:14px}.insight-summary-full{font-size:1.05rem;line-height:1.8}.achievement-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));grid-gap:12px;gap:12px}.achievement-item{background:rgb(var(--bg-alt));border:1px solid rgb(var(--border));border-radius:12px;padding:16px 18px;display:flex;flex-direction:column;gap:4px}.achievement-item b{font-size:1.3rem;color:hsl(var(--nav-theme))}.achievement-item span{font-size:.85rem;color:rgb(var(--text-muted))}.highlight-list{display:flex;flex-direction:column;gap:14px}.highlight-item{background:rgb(var(--bg-alt));border:1px solid rgb(var(--border));border-left:3px solid hsl(var(--nav-theme));border-radius:12px;padding:16px 20px}.highlight-item h3{font-size:1.02rem;font-weight:700;margin-bottom:6px}.highlight-item p{color:rgb(var(--text-muted));font-size:.94rem;line-height:1.7}.body-section{margin-bottom:22px}.body-section h3{font-size:1.08rem;font-weight:700;margin-bottom:8px}.body-section p{line-height:1.85;margin-bottom:10px;color:rgb(var(--text))}.body-cut{margin-top:18px;padding:18px 20px;background:rgb(var(--bg-alt));border:1px dashed hsl(var(--nav-theme)/.4);border-radius:12px;text-align:center;color:hsl(var(--nav-theme));font-weight:600;font-size:.95rem}.keypoint-list{list-style:none;display:flex;flex-direction:column;gap:10px}.keypoint-list li{position:relative;padding-left:26px;font-size:1rem;line-height:1.65}.keypoint-list li:before{content:"▸";position:absolute;left:4px;color:hsl(var(--nav-theme));font-weight:700}.question-list{padding-left:1.4em;display:flex;flex-direction:column;gap:10px}.question-list li{font-size:1.02rem;line-height:1.6;font-weight:500}.quote-list p{font-size:1.05rem;line-height:1.8;border-left:3px solid hsl(var(--nav-theme));padding-left:16px;margin-bottom:12px;color:rgb(var(--text));font-style:normal}.insight-hint{margin-top:14px;font-size:.88rem;color:rgb(var(--text-muted))}.insight-cta{text-align:center;padding:28px 0 8px;font-size:1.2rem;font-weight:800;color:hsl(var(--nav-theme))}.card-block{padding:64px 0;background:linear-gradient(180deg,rgb(var(--bg)) 0,rgb(var(--bg-alt)) 100%);border-top:1px solid rgb(var(--border))}.card-block h2{font-size:1.9rem;font-weight:800;margin-bottom:12px}.card-block .lead{color:rgb(var(--text-muted));max-width:720px;margin-bottom:32px}.card-block-grid{display:grid;grid-template-columns:320px 1fr;grid-gap:40px;gap:40px;align-items:start}@media (max-width:800px){.card-block-grid{grid-template-columns:1fr}}.card-block-img img{width:100%;border:1px solid rgb(var(--border))}.card-block-tip{margin-top:10px;font-size:.85rem;color:rgb(var(--text-muted));text-align:center}.card-block-list{list-style:none;display:flex;flex-direction:column;gap:18px;margin-bottom:28px}.card-block-list li{display:flex;flex-direction:column;gap:4px}.card-block-scan-hint{display:inline-block;padding:12px 22px;border-radius:10px;font-weight:700;font-size:.98rem;background:hsl(var(--nav-theme)/.08);color:hsl(var(--nav-theme));border:1px dashed hsl(var(--nav-theme)/.5)}.card-block-list strong{font-size:1.02rem}.card-block-list span{color:rgb(var(--text-muted));font-size:.92rem}