:root{
  --bg:#151013;--bg2:#1b1417;--paper:#1e1619;--paper2:#251b1f;--deep:#120d10;
  --text:#e8eaf0;--soft:#d7dbe6;--muted:#9aa0af;--line:#3a2a2f;
  --brand:#e0485c;--brand2:#8b5cf6;--cyan:#e8a93c;
  --tip:#34d399;--tipbg:#0f2b23;--warn:#fbbf24;--warnbg:#2a2210;
  --shadow:0 8px 30px rgba(0,0,0,.35);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --header-h:58px;--nav-w:268px;--toc-w:232px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);font-size:14.5px;line-height:1.78;color:var(--text);-webkit-font-smoothing:antialiased;
  background:radial-gradient(1200px 600px at 80% -10%,#2a1118 0%,transparent 55%),radial-gradient(900px 500px at -10% 10%,#201310 0%,transparent 50%),var(--bg);
  background-attachment:fixed}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

/* ── topbar ── */
.topbar{position:fixed;inset:0 0 auto 0;height:var(--header-h);display:flex;align-items:center;gap:16px;padding:0 20px;background:rgba(13,14,18,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:50}
a.brand{text-decoration:none}
a.brand:hover{text-decoration:none}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:15px;letter-spacing:.04em;white-space:nowrap;color:#fff}
.brand .logo{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;display:grid;place-items:center;font-size:12px;font-weight:800;font-family:var(--mono)}
.brand .docs{color:var(--muted);font-weight:500}
.docs-link{color:var(--muted);font-weight:600;font-size:14px;text-decoration:none;padding:4px 2px}
.docs-link:hover{color:#fff;text-decoration:none}
.menu-btn{display:none;border:1px solid var(--line);background:var(--paper);border-radius:8px;width:34px;height:34px;font-size:16px;cursor:pointer;color:var(--soft)}
.searchbox{flex:1;max-width:420px;position:relative}
.searchbox input{width:100%;height:34px;border:1px solid var(--line);border-radius:9px;background:var(--deep);padding:0 64px 0 32px;font:inherit;font-size:13px;color:var(--text)}
.searchbox input::placeholder{color:var(--muted)}
.searchbox input:focus{outline:none;border-color:var(--brand2);background:#191114}
.searchbox .s-icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:13px;pointer-events:none}
.searchbox kbd{position:absolute;right:8px;top:50%;transform:translateY(-50%);font-family:var(--mono);font-size:10.5px;color:var(--muted);border:1px solid var(--line);border-radius:5px;padding:1px 6px;background:var(--paper)}
.top-meta{margin-left:auto;display:flex;align-items:center;gap:12px;font-size:12.5px;white-space:nowrap}
.ver{font-family:var(--mono);font-size:11px;color:var(--soft);border:1px solid var(--line);border-radius:999px;padding:2px 10px;background:var(--paper)}
.top-meta a.site{color:var(--soft);font-weight:500}
.top-meta a.site:hover{color:var(--brand)}

/* ── sidenav ── */
.sidenav{position:fixed;top:var(--header-h);left:0;bottom:0;width:var(--nav-w);overflow-y:auto;border-right:1px solid var(--line);padding:20px 14px 40px;background:rgba(13,14,18,.55);z-index:40}
.navgroup{margin-bottom:22px}
.navgroup h5{font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--muted);text-transform:uppercase;padding:0 10px;margin-bottom:6px}
.sidenav a{display:block;padding:5.5px 10px;border-radius:9px;color:#c3c9d6;font-size:13.5px;line-height:1.5;text-decoration:none;transition:.12s}
.sidenav a:hover{background:var(--paper2);color:#fff;text-decoration:none}
.sidenav a.active{background:linear-gradient(90deg,rgba(224,72,92,.22),rgba(139,92,246,.12));color:#fff;font-weight:600}
.sidenav a .badge{float:right;font-family:var(--mono);font-size:9.5px;letter-spacing:.06em;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:0 5px;margin-top:3px}
.sidenav a.active .badge{color:#ffb3c8;border-color:rgba(224,72,92,.45)}
.sidenav a.s-hide{display:none}

/* ── layout ── */
.wrap{padding:var(--header-h) 0 0 var(--nav-w)}
.content{display:flex;justify-content:center}
article.page{display:none;width:100%;max-width:800px;padding:36px 48px 90px}
article.page.visible{display:block}

/* ── toc ── */
.toc{position:fixed;top:var(--header-h);right:0;bottom:0;width:var(--toc-w);overflow-y:auto;padding:36px 24px 40px 8px;font-size:12.5px}
.toc h6{font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--muted);text-transform:uppercase;margin-bottom:8px}
.toc a{display:block;color:var(--muted);padding:3px 0 3px 12px;border-left:2px solid var(--line);line-height:1.5;text-decoration:none;transition:.12s}
.toc a.lvl3{padding-left:24px}
.toc a:hover{color:var(--text)}
.toc a.on{color:#fff;border-left-color:var(--brand);font-weight:600}

/* product 模式(独立产品页,隐藏文档侧栏) */
body.product-mode .sidenav{display:none}
body.product-mode .wrap{padding-left:0;padding-right:0}
body.product-mode .menu-btn{display:none}
article.page.product{max-width:1380px;padding:24px 28px 90px}
.product .crumb{display:none}
.product .hero.cinema .hinner{padding:130px 40px 80px}

/* landing 布局(产品页) */
article.page.landing{max-width:1380px}
.landing .hero.cinema .hinner{padding:110px 40px 64px}
.landing .hero h1{font-size:clamp(34px,5vw,56px)}
.landing h2{justify-content:center;font-size:25px;margin-top:60px}
.landing h2+p{text-align:center;color:var(--muted)}
.landing p:has(+ .pills),.landing p:has(+ .gallery){text-align:center;color:var(--muted)}
.landing p:has(>a:first-child:last-child){text-align:center;font-weight:600}

/* scroll reveal(产品页滚动入场动效) */
.product .reveal{opacity:0;transform:translateY(32px);transition:opacity .7s ease,transform .7s cubic-bezier(.22,1,.36,1)}
.product .reveal.in{opacity:1;transform:none}

/* hero 进场动画(打开即见) */
@keyframes fadeUp{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:none}}
.product .hero h1{animation:fadeUp .8s .1s cubic-bezier(.22,1,.36,1) both}
.product .hero p{animation:fadeUp .8s .28s cubic-bezier(.22,1,.36,1) both}
.product .hero-cta{animation:fadeUp .8s .46s cubic-bezier(.22,1,.36,1) both}
.product .hero-stats{animation:fadeUp .8s .64s cubic-bezier(.22,1,.36,1) both}

/* ── 产品页酷炫层 ── */
/* ① 胶片颗粒 + 暗角 */
body.product-mode::before{content:'';position:fixed;inset:0;z-index:99;pointer-events:none;opacity:.055;mix-blend-mode:overlay;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");animation:grain .9s steps(4) infinite}
@keyframes grain{0%{transform:translate(0,0)}25%{transform:translate(-4%,3%)}50%{transform:translate(3%,-4%)}75%{transform:translate(-2%,-2%)}100%{transform:translate(0,0)}}
body.product-mode .wrap{position:relative}
body.product-mode .wrap::before{content:'';position:fixed;inset:0;z-index:98;pointer-events:none;background:radial-gradient(120% 90% at 50% 40%,transparent 60%,rgba(8,8,12,.5) 100%)}

/* ② Spotlight 卡片(光标追随描边光) */
.product .cards .card,.product .mcard{position:relative}
.product .cards .card::after,.product .mcard::after{content:'';position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:radial-gradient(240px circle at var(--mx,50%) var(--my,50%),rgba(224,72,92,.6),rgba(139,92,246,.25) 45%,transparent 70%);-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .25s;pointer-events:none}
.product .cards .card:hover::after,.product .mcard:hover::after{opacity:1}

/* ③ 手风琴视频画廊 */
.gallery.accordion{display:flex;gap:10px}
.gallery.accordion figure{flex:1;min-width:0;position:relative;transition:flex .55s cubic-bezier(.22,1,.36,1);margin:0}
.gallery.accordion figure:hover{flex:2.4}
.gallery.accordion figure video{width:100%;height:460px;object-fit:cover;max-height:none}
.gallery.accordion figcaption{position:absolute;left:0;right:0;bottom:0;border:none;background:linear-gradient(transparent,rgba(8,9,12,.88));color:#e8eaf0;padding:26px 16px 12px}

/* ④ 滚动堆叠卡片 */
.cards.stack{display:block}
.cards.stack .card{position:sticky;min-height:300px;display:flex;flex-direction:column;justify-content:center;margin-bottom:120px;box-shadow:0 -12px 40px rgba(0,0,0,.45)}
.cards.stack .card:nth-child(1){top:96px;background:linear-gradient(160deg,rgba(224,72,92,.16),rgba(0,0,0,0) 72%),var(--paper)}
.cards.stack .card:nth-child(2){top:114px;background:linear-gradient(160deg,rgba(139,92,246,.15),rgba(0,0,0,0) 72%),var(--paper)}
.cards.stack .card:nth-child(3){top:132px;background:linear-gradient(160deg,rgba(232,169,60,.12),rgba(0,0,0,0) 72%),var(--paper);margin-bottom:0}
.card.has-bg{background-size:cover;background-position:center;background-repeat:no-repeat}
.cards.stack{counter-reset:feat}
.cards.stack .card.has-bg{align-items:center;text-align:center}
.cards.stack .card.has-bg p{text-align:left}
.cards.stack .card.has-bg{counter-increment:feat;overflow:hidden}
.cards.stack .card.has-bg::before{content:'0' counter(feat);position:absolute;right:36px;top:50%;transform:translateY(-50%);font-size:180px;font-weight:800;line-height:1;font-family:var(--mono);color:rgba(255,255,255,.075);letter-spacing:-.04em;pointer-events:none}
/* 产品页全屏模块 */
.product .fold{min-height:100vh;display:flex;flex-direction:column;justify-content:center;scroll-snap-align:start;padding:48px 0}
.product .fold:first-child{padding-top:0}
.product .fold:has(.cards.stack){display:block;padding-top:12vh}
html:has(body.product-mode){scroll-snap-type:y proximity}
@media (max-width:920px){.product .fold{min-height:0;padding:24px 0}}
.cards.stack .card h4{font-size:21px}
.cards.stack .card p{font-size:13.6px;color:var(--soft);max-width:600px}
.cards.stack .card.has-video{flex-direction:row;align-items:center;gap:36px}
.card.has-video .card-txt{flex:1;min-width:0}
.card-vid{flex:none;height:640px;aspect-ratio:9/16;object-fit:cover;border-radius:14px;border:1px solid var(--line);background:#000;transform:rotate(1.4deg);box-shadow:0 14px 40px rgba(0,0,0,.5);transition:transform .5s cubic-bezier(.22,1,.36,1),box-shadow .5s}
.cards.stack .card:nth-child(2) .card-vid{transform:rotate(-1.4deg)}
.card.has-video:hover .card-vid{transform:rotate(0deg) scale(1.04);box-shadow:0 22px 56px rgba(224,72,92,.22)}
@media(prefers-reduced-motion:reduce){.card-vid{transform:none;transition:none}}

/* ReactBits 风:Blur Text(hero 标题逐字入场) */
.bt-ch{display:inline-block;opacity:0;filter:blur(10px);transform:translateY(14px);animation:btIn .7s cubic-bezier(.22,1,.36,1) forwards}
@keyframes btIn{to{opacity:1;filter:blur(0);transform:none}}
.product .hero h1.bt-done{animation:none}

/* ReactBits 风:Shiny Text(金句条扫光) */
.product .golden{position:relative;overflow:hidden}
.product .golden::after{content:'';position:absolute;top:0;bottom:0;left:-60%;width:42%;background:linear-gradient(105deg,transparent,rgba(255,255,255,.08) 45%,rgba(255,255,255,.16) 50%,rgba(255,255,255,.08) 55%,transparent);transform:skewX(-18deg);animation:sheen 5s ease-in-out infinite;pointer-events:none}
@keyframes sheen{0%,55%{left:-60%}100%{left:135%}}

/* ReactBits 风:Click Spark(点击火花) */
.spark{position:fixed;z-index:120;pointer-events:none}
.spark i{position:absolute;left:-1px;top:-5px;width:2px;height:10px;border-radius:2px;background:var(--brand);transform:rotate(var(--a)) translateY(-6px);animation:sparkFly .5s ease-out forwards}
.spark i:nth-child(even){background:var(--brand2)}
@keyframes sparkFly{to{transform:rotate(var(--a)) translateY(-28px) scaleY(.35);opacity:0}}

/* 产品页卡片 hover 反馈 */
.product .cards:not(.stack) .card{transition:transform .22s cubic-bezier(.22,1,.36,1),border-color .2s,box-shadow .25s,background .25s}
.product .cards:not(.stack) .card .k{transition:letter-spacing .25s,color .25s}
.product .cards:not(.stack) .card p{transition:color .25s}
.product .cards:not(.stack) .card:hover{transform:translateY(-5px) scale(1.015);background:linear-gradient(180deg,rgba(224,72,92,.08),var(--paper) 72%)}
.product .cards:not(.stack) .card:hover .k{letter-spacing:.18em;color:#ff6f9e}
.product .cards:not(.stack) .card:hover p{color:var(--soft)}
body.light .product .cards:not(.stack) .card:hover{background:linear-gradient(180deg,rgba(47,107,223,.08),var(--paper) 72%)}
body.light .product .cards:not(.stack) .card:hover .k{color:#1F55C4}

/* 入口卡:Chroma 流动描边 + Glare 扫光 + 图片景深视差 */
@keyframes chroma{to{background-position:220% 0}}
.product .mcard::before{content:'';position:absolute;inset:0;border-radius:inherit;padding:1px;background:linear-gradient(90deg,rgba(224,72,92,.55),rgba(139,92,246,.55),rgba(232,169,60,.5),rgba(224,72,92,.55));background-size:220% 100%;-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;animation:chroma 7s linear infinite;opacity:.4;pointer-events:none;z-index:2}
.product .mcard:hover::before{opacity:.85}
.product .mcard .mimg{position:relative}
.product .mcard .mimg::after{content:'';position:absolute;inset:0;background:linear-gradient(115deg,transparent 35%,rgba(255,255,255,.22) 48%,rgba(255,255,255,.06) 52%,transparent 65%);transform:translateX(-130%);pointer-events:none}
.product .mcard:hover .mimg::after{transform:translateX(130%);transition:transform .65s ease}

/* 入口卡:扩大 + 3D 倾斜(光标跟随) */
.product .mcards{gap:18px;margin:26px 0 30px}
.product .mcard{transform:perspective(950px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transition:transform .18s ease-out,border-color .2s,box-shadow .25s;will-change:transform}
.product .mcard:hover{transform:perspective(950px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg)) translateY(-4px)}
.product .mcard .mimg{height:212px}
.product .mcard .mimg img{filter:saturate(.9) brightness(.88);transition:filter .35s,transform .35s ease}
.product .mcard:hover .mimg img{filter:none;transform:scale(1.1) translate(calc(var(--px,0)*-10px),calc(var(--py,0)*-8px))}
.product .mcard .mbody{padding:18px 20px 20px}
.product .mcard .mbody h4{font-size:17px}
.product .mcard .mbody p{font-size:13.4px;line-height:1.7}

/* ⑤ 滚动视差 hero(支持 scroll-driven animation 的浏览器) */
@supports (animation-timeline: view()){
  .product .hero.cinema .hbg{animation:heroZoom linear both;animation-timeline:view();animation-range:exit-crossing 0% exit-crossing 100%}
  @keyframes heroZoom{to{transform:scale(1.18);filter:brightness(.75)}}
}

/* 更高的 hero + 流动渐变大字 */
.product .hero{text-align:left}
.product .hero.cinema .hinner{padding:120px 64px 76px;max-width:820px}
.product .hero p{margin:0 0 20px;max-width:540px}
.product .hero p strong{white-space:nowrap;color:#fff}
.product .hero-cta{justify-content:flex-start}
.product .hero-stats{justify-content:flex-start;gap:52px}
.landing .hero h1{font-size:clamp(36px,5.6vw,64px)}
.product .hero .grad{background:linear-gradient(90deg,var(--brand),var(--brand2) 62%,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
/* CTA 呼吸光 */
.product .hero-cta a:first-child{box-shadow:0 6px 24px rgba(224,72,92,.3)}
.product .hero-cta a:first-child:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(224,72,92,.4)}
/* 环境极光 */
@keyframes aurora{from{transform:translate3d(-3%,-2%,0) scale(1)}to{transform:translate3d(3%,4%,0) scale(1.1)}}
#fxbg{position:fixed;inset:0;width:100%;height:100%;z-index:-1;display:none;pointer-events:none}
@media (prefers-reduced-motion:no-preference){
  body.fx-bg.product-mode:not(.light) #fxbg{display:block}
  body.fx-bg.product-mode:not(.light)::after{content:none}
}
body.product-mode::after{content:'';position:fixed;inset:-20%;z-index:-1;pointer-events:none;background:radial-gradient(640px 420px at 18% 28%,rgba(224,72,92,.13),transparent 60%),radial-gradient(760px 520px at 82% 72%,rgba(139,92,246,.13),transparent 60%),radial-gradient(500px 380px at 55% 95%,rgba(232,169,60,.08),transparent 60%);animation:aurora 14s ease-in-out infinite alternate}
/* 超大描边反向跑马灯 */
.marquee.mega{border:none;padding:4px 0;margin:2px 0 30px}
@keyframes mqr{from{transform:translateX(-50%)}to{transform:translateX(0)}}
.marquee.mega .track{font-size:clamp(38px,6vw,66px);font-weight:800;letter-spacing:.04em;color:transparent;-webkit-text-stroke:1.5px rgba(224,72,92,.55);animation:mqr 26s linear infinite}
.marquee.mega .track em{-webkit-text-stroke:0;color:var(--brand2);margin:0 30px}
/* 卡片悬停辉光 */
.product .cards .card:hover{border-color:rgba(224,72,92,.45);box-shadow:0 10px 30px rgba(224,72,92,.13)}
.product .mcard:hover{box-shadow:0 12px 34px rgba(139,92,246,.18)}
/* 金句条渐变流动 */


/* hero 统计数字 */
.hero-stats{display:flex;justify-content:center;gap:44px;flex-wrap:wrap;margin:22px 0 14px;position:relative;z-index:2}
.hstat b{display:block;font-family:var(--mono);font-size:27px;font-weight:800;color:#fff;line-height:1.2;text-shadow:0 2px 16px rgba(0,0,0,.6)}
.hstat span{font-size:12px;color:var(--muted);letter-spacing:.08em}

/* marquee 跑马灯 */
.marquee{overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:15px 0;margin:30px 0;white-space:nowrap;mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee .track{display:inline-block;animation:mq 30s linear infinite;font-family:var(--mono);font-size:13px;letter-spacing:.18em;color:var(--soft)}
.marquee .track em{font-style:normal;color:var(--brand);margin:0 22px}
@keyframes mq{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.marquee .track{animation:none}}

/* cinema hero(视频背景) */
.hero.cinema{padding:0;border:1px solid var(--line)}
.hero.cinema .hbg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero.cinema .hveil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,14,18,.55),rgba(13,14,18,.35) 40%,rgba(13,14,18,.88));z-index:1}
.hero.cinema .hinner{position:relative;z-index:2;padding:88px 40px 52px}
.hero.cinema h1{text-shadow:0 2px 24px rgba(0,0,0,.6)}
.hero.cinema p{color:#e8eaf0;text-shadow:0 1px 12px rgba(0,0,0,.7)}

/* back button */
.backbtn{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--soft);border:1px solid var(--line);border-radius:999px;padding:4px 14px;margin-bottom:16px;background:var(--paper);text-decoration:none;transition:.15s}
.backbtn:hover{border-color:var(--brand);color:#fff;text-decoration:none;transform:translateX(-2px)}

/* ── article typography ── */
.crumb{font-size:12.5px;color:var(--muted);margin-bottom:14px;font-weight:500}
.crumb b{color:var(--soft);font-weight:600}
.crumb .sep{margin:0 7px;color:#4a4f5e}
article h1{font-size:30px;font-weight:800;letter-spacing:.01em;line-height:1.25;margin-bottom:10px;color:#fff}
.lede{font-size:16px;color:var(--soft);margin-bottom:28px;line-height:1.8}
article h2{font-size:21px;font-weight:700;margin:46px 0 14px;padding-top:8px;scroll-margin-top:78px;color:#fff;display:flex;align-items:center;gap:10px}
article h2::before{content:"";width:4px;height:20px;border-radius:3px;background:linear-gradient(180deg,var(--brand),var(--brand2));flex:none}
article h3{font-size:15.5px;font-weight:650;margin:28px 0 10px;scroll-margin-top:78px;color:var(--cyan);letter-spacing:.02em}
article p{margin-bottom:14px}
article ul,article ol{padding-left:22px;margin-bottom:14px}
article li{margin-bottom:5px}
article li::marker{color:var(--muted)}
strong,b{font-weight:650;color:#fff}
code{font-family:var(--mono);font-size:12.5px;background:var(--deep);border:1px solid var(--line);border-radius:6px;padding:1px 6px;color:#c9d1e6}
blockquote{border-left:3px solid var(--brand2);padding:2px 0 2px 16px;color:var(--soft);margin:0 0 14px;font-style:italic}

/* tables */
table{width:100%;border-collapse:collapse;margin:16px 0 22px;font-size:13.8px;line-height:1.65;background:var(--paper);border:1px solid var(--line);border-radius:12px;overflow:hidden}
table{display:table}
th{text-align:left;font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.05em;text-transform:uppercase;padding:9px 14px;border-bottom:1px solid var(--line);background:var(--paper2);white-space:nowrap}
td{padding:9px 14px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--soft)}
td:first-child{white-space:nowrap;font-weight:600;color:var(--text)}
table.wrap-first td:first-child{white-space:normal}
tr:last-child td{border-bottom:none}
tr:hover td{background:var(--paper2)}
.tbl-scroll{overflow-x:auto}

/* callouts */
.callout{display:flex;gap:12px;border:1px solid var(--line);border-radius:12px;padding:13px 16px;margin:16px 0 20px;font-size:14px;line-height:1.7;background:var(--paper2);color:var(--soft)}
.callout .tag{flex:none;font-size:11px;font-weight:800;letter-spacing:.09em;padding-top:3.5px;text-transform:uppercase;font-family:var(--mono);color:var(--muted)}
.callout.tip{background:var(--tipbg);border-color:rgba(52,211,153,.35);color:#b8f0dd}
.callout.tip .tag{color:var(--tip)}
.callout.tip strong,.callout.tip b{color:#e7fff5}
.callout.warn{background:var(--warnbg);border-color:rgba(251,191,36,.35);color:#f2dfae}
.callout.warn .tag{color:var(--warn)}
.callout.warn strong,.callout.warn b{color:#fff6dd}
.callout p:last-child{margin-bottom:0}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin:18px 0 24px}
.cards.wide{grid-template-columns:repeat(auto-fill,minmax(235px,1fr))}
.cards.cols3{grid-template-columns:repeat(3,1fr)}
.cards.bento3{grid-template-columns:1.35fr 1fr}
.cards.bento3 .card:first-child{grid-row:1/3;display:flex;flex-direction:column;justify-content:flex-end;min-height:260px;background:linear-gradient(165deg,rgba(224,72,92,.18),rgba(139,92,246,.09) 55%,var(--paper) 90%)}
.cards.bento3 .card:first-child h4{font-size:21px}
.cards.bento3 .card:first-child p{font-size:13.4px;color:var(--soft)}
.card{border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:var(--paper);box-shadow:var(--shadow);transition:.15s}
.card:hover{border-color:rgba(224,72,92,.5);transform:translateY(-2px)}
.card .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--brand);display:block;margin-bottom:7px;text-transform:uppercase}
.card h4{font-size:14.5px;font-weight:700;margin-bottom:4px;color:#fff}
.card p{font-size:13px;color:var(--muted);margin:0;line-height:1.65}
.card.hot{border-color:rgba(224,72,92,.45);background:linear-gradient(135deg,rgba(224,72,92,.14),rgba(139,92,246,.10))}

/* media cards（带截图的链接卡片）*/
.mcards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:18px 0 24px}
.mcard{--ac:var(--brand);display:block;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--paper);text-decoration:none;color:var(--text);box-shadow:var(--shadow);transition:.18s}
.mcard:hover{transform:translateY(-3px);text-decoration:none;border-color:var(--ac)}
.mcard:nth-child(3n+2){--ac:var(--brand2)}
.mcard:nth-child(3n+3){--ac:var(--cyan)}
.mcard .mimg{height:118px;overflow:hidden;border-bottom:2px solid var(--ac)}
.mcard .mimg img{width:100%;height:100%;object-fit:cover;object-position:top;display:block;transition:.25s ease}
.mcard:hover .mimg img{transform:scale(1.05)}
.mcard .mbody{padding:13px 16px 15px}
.mcard .mbody h4{font-size:15px;font-weight:700;color:#fff;margin:0 0 5px;display:flex;justify-content:space-between;align-items:center;gap:8px}
.mcard .mbody h4 .arr{color:var(--ac);transition:.18s;flex:none}
.mcard:hover .mbody h4 .arr{transform:translateX(3px)}
.mcard .mbody p{font-size:12.8px;color:var(--muted);margin:0;line-height:1.65}

/* pills */
.pills{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 20px}
.pills span{font-size:12.5px;background:rgba(139,92,246,.12);border:1px solid rgba(139,92,246,.3);color:#d3c6f5;padding:4px 13px;border-radius:999px}

/* steps */
ol.steps{list-style:none;padding:0;margin:18px 0 24px;counter-reset:st;display:grid;gap:10px}
ol.steps>li{counter-increment:st;position:relative;padding:13px 16px 13px 58px;background:var(--paper2);border:1px solid var(--line);border-radius:12px}
ol.steps>li::before{content:counter(st);position:absolute;left:15px;top:13px;width:28px;height:28px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;display:grid;place-items:center;font-size:14px;font-family:var(--mono)}
ol.steps b.t{display:block;font-weight:700;font-size:14.5px;color:#fff}
ol.steps .d{color:var(--soft);font-size:13.8px}

/* hero */
.hero{position:relative;overflow:hidden;border-radius:18px;padding:56px 40px 46px;margin-bottom:28px;background:linear-gradient(135deg,rgba(224,72,92,.18),rgba(139,92,246,.14) 55%,rgba(232,169,60,.10));border:1px solid var(--line);text-align:center}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(500px 260px at 85% 20%,rgba(224,72,92,.25),transparent 70%);pointer-events:none}
.hero h1{font-size:clamp(30px,4.6vw,46px);line-height:1.15;margin:0 0 14px;font-weight:800;color:#fff;letter-spacing:.01em}
.hero .grad{background:linear-gradient(90deg,var(--brand),var(--brand2) 60%,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:16px;color:#d7dbe6;margin:0 auto 18px;max-width:560px;position:relative;z-index:1;line-height:1.8}
.hero-cta{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:6px 0 20px;position:relative;z-index:1}
.hero-cta a{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:650;padding:10px 26px;border-radius:999px;text-decoration:none;transition:.15s}
.hero-cta a:first-child{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 6px 24px rgba(224,72,92,.35)}
.hero-cta a:first-child:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(224,72,92,.45);text-decoration:none}
.hero-cta a:not(:first-child){border:1px solid var(--line);color:var(--soft);background:rgba(255,255,255,.03)}
.hero-cta a:not(:first-child):hover{border-color:var(--brand2);color:#fff;text-decoration:none}
.hero .pills{margin:0;position:relative;z-index:1;justify-content:center}
.hero .pills span{background:rgba(255,255,255,.04);color:var(--muted)}
.hero .pills span strong{color:#fff}

/* golden banner */
.golden{margin:16px 0 20px;padding:18px 20px;border-radius:14px;background:linear-gradient(90deg,rgba(224,72,92,.14),rgba(139,92,246,.12),rgba(232,169,60,.10));border:1px solid var(--line);font-size:16px;font-weight:600;text-align:center;letter-spacing:.3px;color:#fff}

/* dark diagram */
.diagram{background:var(--deep);border:1px solid var(--line);color:var(--soft);border-radius:14px;padding:20px 24px;margin:18px 0 24px;font-family:var(--mono);font-size:12.5px;line-height:1.95;overflow-x:auto;box-shadow:var(--shadow)}
.diagram pre{font-family:inherit;white-space:pre}
.diagram .g{color:var(--tip)}
.diagram .r{color:var(--brand)}
.diagram .c{color:#6e7280}
.diagram .w{color:#fff;font-weight:700}

/* figures */
figure{border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:18px 0 24px;background:#0a0b0e}
figure img{display:block;width:auto;max-width:100%;max-height:720px;margin:0 auto}
figure video{display:block;width:100%;max-height:720px;background:#000}
figcaption{padding:9px 13px;font-size:12.5px;color:var(--muted);border-top:1px solid var(--line);background:var(--paper2)}
.shot-wrap{position:relative;overflow:hidden}
.shot-wrap.masked img,.shot-wrap.masked video{filter:blur(28px) saturate(.6);transform:scale(1.06)}
.shot-wrap.masked video{pointer-events:none}
.shot-wrap .veil{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;background:rgba(13,14,18,.35);cursor:pointer;text-align:center;padding:20px}
.shot-wrap .veil b{font-size:15px;color:#fff}
.shot-wrap .veil span{font-size:12.5px;color:#c3c9d6;background:rgba(0,0,0,.5);border:1px solid var(--line);padding:5px 14px;border-radius:999px}
.shot-wrap:not(.masked) .veil{display:none}

/* lightbox */
figure img{cursor:zoom-in}
.shot-wrap.masked img{cursor:pointer}
.lightbox{position:fixed;inset:0;background:rgba(10,10,14,.94);z-index:100;display:grid;place-items:center;cursor:zoom-out;overflow:auto;padding:24px}
.lightbox img{max-width:96vw;max-height:94vh;width:auto;height:auto;border-radius:8px;box-shadow:0 20px 80px rgba(0,0,0,.6)}

/* gallery（多图并排）*/
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:18px 0 24px;align-items:start}
.gallery.cols2{grid-template-columns:repeat(2,1fr)}
.gallery.cols1{grid-template-columns:1fr}
.gallery.cols1 figure img{height:auto}
.gallery figure{margin:0}
.gallery figure img{width:100%;height:200px;object-fit:cover;object-position:top;max-height:none}
.gallery figure video{width:100%;height:auto;max-height:420px;background:#000;display:block}
.gallery.cols2 figure video{aspect-ratio:16/9;object-fit:cover}
.gallery figcaption{font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.gallery figure.ph{display:flex;border:none;background:none;overflow:visible}
.gallery figure.ph .ph-slot{flex:1;min-height:0}
.gallery .veil b{font-size:12.5px}
.gallery .veil span{font-size:11px;padding:3px 10px}
/* Magic Bento：产品页图库卡片的聚光描边 + 浮起 + 星尘 */
.product .gallery figure{position:relative;transition:transform .28s cubic-bezier(.22,1,.36,1),box-shadow .3s}
.product .gallery figure::after{content:'';position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:radial-gradient(260px circle at var(--mx,50%) var(--my,50%),rgba(139,92,246,.75),rgba(224,72,92,.3) 45%,transparent 70%);-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .25s;pointer-events:none}
.product .gallery figure:hover::after{opacity:1}
.product .gallery figure:hover{transform:translateY(-4px);box-shadow:0 16px 44px rgba(139,92,246,.16)}
.bento-p{position:absolute;width:4px;height:4px;border-radius:50%;background:#cfa9ff;box-shadow:0 0 8px #b388ff;pointer-events:none;z-index:3;animation:bp .8s ease-out forwards}
@keyframes bp{from{opacity:1;transform:translate(0,0) scale(1)}to{opacity:0;transform:translate(var(--dx,0),var(--dy,-40px)) scale(.3)}}
@media (prefers-reduced-motion:reduce){.product .gallery figure:hover{transform:none}.bento-p{display:none}}

/* 素材占位插槽 */
figure.ph{border:none;background:none;overflow:visible}
.ph-slot{border:1.5px dashed #3a3f50;border-radius:14px;min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;text-align:center;padding:30px;background:repeating-linear-gradient(45deg,transparent 0 16px,rgba(255,255,255,.016) 16px 32px)}
.ph-tag{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:3px 12px}
.ph-slot b{color:var(--soft);font-size:15px;font-weight:600}
.ph-hint{font-size:12px;color:var(--muted)}
.landing .pills{justify-content:center}

/* prev / next */
.pn{display:flex;gap:12px;margin-top:56px}
.pn a{flex:1;border:1px solid var(--line);border-radius:14px;padding:13px 18px;text-decoration:none;color:var(--text);min-width:0;background:var(--paper);transition:.15s}
.pn a:hover{border-color:var(--brand);transform:translateY(-2px);text-decoration:none}
.pn .lbl{display:block;font-size:11.5px;color:var(--muted);margin-bottom:2px}
.pn .ttl{font-size:13.5px;font-weight:600;color:var(--cyan)}
.pn a.next{text-align:right}

.footnote{margin-top:40px;padding-top:18px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted)}

/* responsive */
@media (max-width:1180px){
  .wrap{padding-right:0}
  .toc{display:none}
}
@media (max-width:920px){
  .wrap{padding-left:0}
  .sidenav{transform:translateX(-100%);transition:transform .2s ease;background:var(--bg2)}
  .sidenav.open{transform:none;box-shadow:0 10px 40px rgba(0,0,0,.5)}
  .menu-btn{display:block}
  article.page{padding:28px 22px 70px}
  .hero{padding:30px 22px 26px}
  .cards.cols3{grid-template-columns:1fr}
  .cards.bento3{grid-template-columns:1fr}
  .cards.bento3 .card:first-child{grid-row:auto;min-height:0}
  .mcards{grid-template-columns:1fr}
  .gallery{grid-template-columns:1fr}
  .gallery.accordion{flex-direction:column}
  .gallery.accordion figure video{height:300px}
  .cards.stack .card{position:static;margin-bottom:14px}
  .cards.stack .card.has-video{flex-direction:column;align-items:stretch;gap:18px}
  .card-vid{width:min(320px,80%);align-self:center;transform:none}
  .gallery figure img{height:auto}
  .searchbox kbd{display:none}
  .top-meta a.site{display:none}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .sidenav{transition:none}
  .card,.pn a{transition:none}
}


/* ═══ 亮色主题(body.light)═══ */
.theme-btn{border:1px solid var(--line);background:transparent;border-radius:999px;width:34px;height:34px;cursor:pointer;color:var(--soft);font-size:15px;line-height:1;transition:.15s}
.theme-btn:hover{border-color:var(--brand);color:var(--text)}
body.light{--bg:#FAF6EC;--bg2:#F3EDDD;--paper:#FFFFFF;--paper2:#F7F2E4;--deep:#F1EBDA;--text:#22303F;--soft:#41526A;--muted:#8291A6;--line:#E6DFC9;--brand:#2F6BDF;--brand2:#E8A93C;--cyan:#5B8DEF;--tip:#2F8F5B;--tipbg:#EAF4EC;--warn:#A9741B;--warnbg:#FBF3DC;--shadow:0 10px 28px rgba(48,68,110,.10);
  background:radial-gradient(1100px 560px at 82% -8%,rgba(232,169,60,.16) 0%,transparent 55%),radial-gradient(900px 520px at -8% 12%,rgba(47,107,223,.10) 0%,transparent 50%),var(--bg);background-attachment:fixed;color:var(--text)}
body.light .topbar{background:rgba(250,246,236,.9)}
body.light .brand{color:var(--text)}
body.light .searchbox input{background:#fff}
body.light .searchbox input:focus{border-color:var(--brand);background:#fff}
body.light .searchbox kbd{background:var(--paper2)}
body.light .docs-link:hover{color:var(--brand)}
body.light .menu-btn{background:var(--paper2);color:var(--soft)}
body.light .sidenav{background:rgba(250,246,236,.78)}
body.light .sidenav a{color:#54647B}
body.light .sidenav a:hover{color:var(--text)}
body.light .sidenav a.active{background:linear-gradient(90deg,rgba(47,107,223,.14),rgba(232,169,60,.12));color:#1F4FBF}
body.light .sidenav a.active .badge{color:#1F4FBF;border-color:rgba(47,107,223,.4)}
body.light .sidenav.open{box-shadow:0 10px 40px rgba(50,60,90,.25)}
body.light article h1,body.light article h2{color:var(--text)}
body.light article h3{color:#1F55C4}
body.light strong,body.light b{color:var(--text)}
body.light code{color:#39507A}
body.light tr:hover td{background:#FBF7EB}
body.light .callout.tip{border-color:#CBE3D2;color:#2E5A41}
body.light .callout.tip strong,body.light .callout.tip b{color:#1E4630}
body.light .callout.warn{border-color:#EBDDB4;color:#6B5316}
body.light .callout.warn strong,body.light .callout.warn b{color:#4F3D0E}
body.light .card h4{color:var(--text)}
body.light .card:hover{border-color:rgba(47,107,223,.45)}
body.light .card.hot{border-color:rgba(47,107,223,.4);background:linear-gradient(135deg,rgba(47,107,223,.10),rgba(232,169,60,.10))}
body.light .pills span{background:rgba(47,107,223,.08);border-color:rgba(47,107,223,.28);color:#2A5BC8}
body.light ol.steps b.t{color:var(--text)}
body.light .diagram{background:#1E2C4A;border-color:#2C3D63;color:#D8E1F2}
body.light .diagram .g{color:#8CC7A1}
body.light .diagram .r{color:#F2C24C}
body.light .diagram .c{color:#7C8BAD}
body.light figure{background:#fff}
body.light .pn .ttl{color:var(--brand)}
body.light .backbtn:hover{color:var(--brand)}
body.light .hero{background:linear-gradient(135deg,rgba(47,107,223,.14),rgba(232,169,60,.14) 55%,rgba(91,141,239,.08))}
body.light .hero::after{background:radial-gradient(520px 280px at 85% 18%,rgba(232,169,60,.22),transparent 70%)}
body.light .product .hero .grad{background:linear-gradient(90deg,#7FB0FF,#F5C84C);-webkit-background-clip:text;background-clip:text;color:transparent}
body.light .hero-cta a:first-child{background:linear-gradient(135deg,#3E77F0,#2F5FCE);box-shadow:0 6px 22px rgba(47,107,223,.4)}
body.light .hero-cta a:first-child:hover{box-shadow:0 10px 30px rgba(47,107,223,.5)}
body.light .hero-cta a:not(:first-child){border-color:rgba(255,255,255,.4);color:#F0F4FA;background:rgba(20,28,44,.35)}
body.light .hero-cta a:not(:first-child):hover{border-color:#F5C84C;color:#fff}
body.light .hero .pills span{background:rgba(16,24,40,.35);border-color:rgba(255,255,255,.25);color:#DCE5F2}
body.light .hstat span{color:#C3CFE0}
body.light.product-mode::before{mix-blend-mode:multiply;opacity:.05}
body.light.product-mode .wrap::before{background:radial-gradient(120% 90% at 50% 40%,transparent 62%,rgba(70,80,105,.16) 100%)}
body.light.product-mode::after{background:radial-gradient(640px 420px at 18% 28%,rgba(232,169,60,.14),transparent 60%),radial-gradient(760px 520px at 82% 72%,rgba(47,107,223,.10),transparent 60%),radial-gradient(500px 380px at 55% 95%,rgba(91,141,239,.08),transparent 60%)}
body.light .product .cards .card::after,body.light .product .mcard::after{background:radial-gradient(240px circle at var(--mx,50%) var(--my,50%),rgba(47,107,223,.5),rgba(232,169,60,.28) 45%,transparent 70%)}
body.light .cards.stack .card{box-shadow:0 -12px 34px rgba(52,66,100,.16)}
body.light .cards.stack .card:nth-child(1){background:linear-gradient(160deg,rgba(47,107,223,.12),rgba(0,0,0,0) 72%),var(--paper)}
body.light .cards.stack .card:nth-child(2){background:linear-gradient(160deg,rgba(232,169,60,.16),rgba(0,0,0,0) 72%),var(--paper)}
body.light .cards.stack .card:nth-child(3){background:linear-gradient(160deg,rgba(91,141,239,.12),rgba(0,0,0,0) 72%),var(--paper)}
body.light .product .cards .card:hover{border-color:rgba(47,107,223,.4);box-shadow:0 10px 28px rgba(47,107,223,.13)}
body.light .product .mcard:hover{box-shadow:0 12px 32px rgba(47,107,223,.16)}
body.light .marquee .track em{color:#D9970F}
body.light .golden{background:linear-gradient(90deg,rgba(47,107,223,.10),rgba(232,169,60,.16),rgba(47,107,223,.08));color:var(--text)}
body.light .product .golden::after{background:linear-gradient(105deg,transparent,rgba(255,255,255,.3) 45%,rgba(255,255,255,.5) 50%,rgba(255,255,255,.3) 55%,transparent)}
body.light .ph-slot{border-color:#CFC6A8;background:repeating-linear-gradient(45deg,transparent 0 16px,rgba(60,70,100,.03) 16px 32px)}