:root{--blue:#0068ff;--sky:#00b2ff;--ink:#0a1a33;--muted:#5a6b85;--line:#e4ebf6;--bg:#f5f8ff;--radius:18px;--shadow:0 18px 44px rgba(10,26,51,.1)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
h1,h2,h3,h4{margin:0 0 14px;line-height:1.28;letter-spacing:-.2px}
h2{font-size:34px}
h3{font-size:19px}
p{margin:0 0 16px;color:var(--muted)}
ul{margin:0;padding:0;list-style:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.sec{padding:82px 0}
.sec-alt{background:linear-gradient(180deg,#f5f8ff,#fff)}
.sec-head{max-width:760px;margin:0 auto 44px;text-align:center}
.sec-head p{font-size:16.5px}
.eyebrow{display:inline-block;padding:6px 14px;border-radius:999px;background:#e8f1ff;color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.6px;margin-bottom:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 26px;border-radius:12px;font-weight:700;font-size:15.5px;border:1px solid transparent;cursor:pointer;transition:.22s;min-height:48px}
.btn-main{background:linear-gradient(135deg,var(--blue),var(--sky));color:#fff;box-shadow:0 12px 26px rgba(0,104,255,.28)}
.btn-main:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(0,104,255,.36)}
.btn-ghost{background:#fff;color:var(--blue);border-color:#c9dcff}
.btn-ghost:hover{background:#f0f6ff;transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px;min-height:42px}
.hd{position:sticky;top:0;z-index:120;background:rgba(255,255,255,.94);backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid rgba(10,26,51,.07);transition:box-shadow .25s,background .25s}
.hd.scrolled{box-shadow:0 12px 30px rgba(10,26,51,.12);background:rgba(255,255,255,.98)}
.hd-in{max-width:1200px;margin:0 auto;padding:0 20px;height:72px;display:flex;align-items:center;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink);white-space:nowrap}
.logo img{width:34px;height:34px;border-radius:9px}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav>a,.dd>label{padding:10px 14px;border-radius:10px;color:#31415c;font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px;cursor:pointer;transition:.2s}
.nav>a:hover,.dd>label:hover{background:#eef4ff;color:var(--blue)}
.dd{position:relative}
.dd i{font-style:normal;font-size:10px;transition:transform .25s}
.dd:hover>label i,.dd:focus-within>label i{transform:rotate(180deg)}
.dd ul{position:absolute;top:calc(100% + 10px);left:0;min-width:216px;background:#fff;border-radius:14px;box-shadow:0 20px 50px rgba(10,26,51,.18);padding:8px;opacity:0;visibility:hidden;transform:translateY(-8px);transition:.22s;border:1px solid var(--line)}
.dd:hover ul,.dd:focus-within ul{opacity:1;visibility:visible;transform:none}
.dd ul a{display:block;padding:10px 12px;border-radius:9px;color:#31415c;font-size:14px;font-weight:500}
.dd ul a:hover{background:#f0f6ff;color:var(--blue)}
.ddc,.navcheck{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;margin-left:auto;cursor:pointer;border-radius:10px;background:#f0f6ff}
.burger span{display:block;width:20px;height:2px;background:var(--ink);margin:0 auto;border-radius:2px;transition:.25s}
.hd .btn-hd{white-space:nowrap}
.hero{position:relative;overflow:hidden;background:radial-gradient(900px 480px at 8% -10%,#dcebff,transparent 70%),linear-gradient(180deg,#f6faff,#fff)}
.hero:before{content:"";position:absolute;right:-160px;top:-120px;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,#cfe4ff,transparent 65%);opacity:.85}
.hero-in{position:relative;max-width:1200px;margin:0 auto;padding:64px 20px 76px;display:grid;grid-template-columns:1.04fr .96fr;gap:48px;align-items:center}
.hero h1{font-size:45px;letter-spacing:-1px}
.hero h1 em{font-style:normal;background:linear-gradient(135deg,var(--blue),var(--sky));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17.5px;color:#4d5f7a;max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 30px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:560px}
.hero-stats div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.hero-stats b{display:block;font-size:22px;color:var(--blue);line-height:1.2}
.hero-stats span{font-size:12.5px;color:var(--muted)}
.hero-shot{display:block;width:100%;height:auto;border-radius:22px;box-shadow:0 28px 70px rgba(10,26,51,.16);border:1px solid rgba(10,26,51,.06)}
.grid{display:grid;gap:20px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:transform .25s,box-shadow .25s,border-color .25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#cbdcff}
.card .ico{width:46px;height:46px;border-radius:13px;background:#eaf2ff;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:14px}
.card p{margin:0;font-size:14.5px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center}
.stat b{display:block;font-size:32px;color:var(--blue);line-height:1.15;margin-bottom:6px}
.stat span{font-size:13.5px;color:var(--muted)}
.scene{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.25s}
.scene:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.scene h3{font-size:17px;margin-bottom:8px}
.scene p{font-size:14px;margin:0}
.scene .tag{display:inline-block;font-size:12px;color:var(--blue);background:#eef4ff;border-radius:999px;padding:4px 10px;margin-top:14px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split ul li{position:relative;padding-left:28px;margin-bottom:12px;color:#3b4d68;font-size:15px}
.split ul li:before{content:"✓";position:absolute;left:0;top:0;color:var(--blue);font-weight:800}
.panel{background:linear-gradient(135deg,#0068ff,#00b2ff);border-radius:26px;padding:44px;color:#fff}
.panel h2{color:#fff}
.panel p{color:rgba(255,255,255,.86)}
.panel .mini{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:22px}
.panel .mini div{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);border-radius:14px;padding:14px 16px;font-size:14px;backdrop-filter:blur(6px)}
.panel .mini b{display:block;font-size:21px;color:#fff}
.faq{max-width:860px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:0 20px;margin-bottom:12px;transition:.2s}
.faq details[open]{border-color:#bcd6ff;box-shadow:0 12px 28px rgba(10,26,51,.07)}
.faq summary{cursor:pointer;padding:17px 0;font-weight:700;font-size:16px;list-style:none;display:flex;justify-content:space-between;gap:14px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--blue);font-size:20px;font-weight:700;transition:.2s}
.faq details[open] summary:after{content:"−"}
.faq details p{margin:0 0 18px;font-size:14.5px}
.quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.25s}
.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.stars{color:#ffb020;font-size:14px;letter-spacing:2px;margin-bottom:10px}
.quote p{font-size:14.5px;color:#31415c;margin-bottom:16px}
.who{display:flex;align-items:center;gap:10px}
.who span.a{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#0068ff,#00b2ff);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.who b{font-size:14px;display:block;line-height:1.3}
.who small{font-size:12px;color:var(--muted)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.news-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.news-card .nc-body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-card .cat{font-size:12px;color:var(--blue);background:#eef4ff;border-radius:999px;padding:3px 10px;align-self:flex-start;margin-bottom:10px}
.news-card h3{font-size:17px;line-height:1.45}
.news-card p{font-size:14px;margin-bottom:14px}
.news-card .meta{font-size:12.5px;color:#8b9ab2;margin-top:auto}
.cta{background:linear-gradient(135deg,#052a63,#0068ff 60%,#00b2ff);color:#fff;border-radius:26px;padding:52px 40px;text-align:center}
.cta h2{color:#fff;font-size:32px}
.cta p{color:rgba(255,255,255,.9);max-width:640px;margin:0 auto 26px}
.cta .btn-ghost{background:#fff;border-color:#fff}
.ft{background:#061123;color:#a8b7cd;padding:56px 0 0;margin-top:0}
.ft-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px;padding-bottom:34px}
.ft h4{color:#fff;font-size:15px;margin-bottom:14px}
.ft a{color:#a8b7cd;font-size:14px;display:block;padding:5px 0}
.ft a:hover{color:#fff}
.ft .logo{color:#fff;margin-bottom:12px}
.ft p{color:#8b9ab2;font-size:13.5px;max-width:330px}
.ft-bot{border-top:1px solid rgba(255,255,255,.09);padding:18px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:#7d8ca3}
.ft-bot .links{display:flex;gap:16px;flex-wrap:wrap}
.ft-bot .links a{display:inline;padding:0}
.totop{position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--sky));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 26px rgba(0,104,255,.35);font-size:18px;opacity:0;visibility:hidden;transition:.25s;z-index:130}
.totop.on{opacity:1;visibility:visible}
.totop:hover{transform:translateY(-3px)}
.phero{background:radial-gradient(700px 340px at 12% -20%,#dcebff,transparent 70%),linear-gradient(180deg,#f6faff,#fff);padding:56px 0 46px;border-bottom:1px solid var(--line)}
.phero h1{font-size:38px;max-width:900px}
.phero p{max-width:760px;font-size:16.5px;margin:0}
.crumb{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:#8b9ab2;margin-bottom:16px}
.crumb a{color:#5a6b85}
.crumb span{color:#b6c2d4}
.dl-hero-in{display:grid;grid-template-columns:1.02fr .98fr;gap:44px;align-items:center}
.dl-list{display:grid;gap:20px;grid-template-columns:repeat(3,1fr)}
.dl-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;transition:.25s}
.dl-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.dl-card .plat{font-size:14px;color:var(--blue);font-weight:700;margin-bottom:6px}
.dl-card .ver{font-size:24px;font-weight:800;margin-bottom:4px}
.dl-card .size{font-size:13px;color:#8b9ab2;margin-bottom:16px}
.dl-card ul{margin-bottom:20px}
.dl-card li{padding:6px 0 6px 22px;position:relative;font-size:14px;color:#3b4d68}
.dl-card li:before{content:"•";position:absolute;left:6px;color:var(--blue);font-weight:800}
.req{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.req div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px}
.req b{display:block;font-size:13px;color:var(--blue);margin-bottom:4px}
.req span{font-size:14px;color:#3b4d68}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.steps div{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:relative}
.steps div:before{counter-increment:s;content:"0" counter(s);font-size:13px;font-weight:800;color:var(--blue);background:#eef4ff;border-radius:8px;padding:2px 8px;display:inline-block;margin-bottom:12px}
.steps h3{font-size:17px;margin-bottom:6px}
.steps p{font-size:14px;margin:0}
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:38px;align-items:start;padding:46px 0 20px}
.article{background:#fff;border:1px solid var(--line);border-radius:20px;padding:34px;min-width:0}
.article h1{font-size:32px;line-height:1.34}
.article .meta{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:#8b9ab2;margin-bottom:22px;padding-bottom:18px;border-bottom:1px dashed var(--line)}
.article figure{margin:0 0 26px}
.article figure img{border-radius:14px;width:100%}
.article figcaption{font-size:12.5px;color:#8b9ab2;margin-top:8px;text-align:center}
.article h2{font-size:25px;margin-top:32px;padding-top:6px;scroll-margin-top:96px}
.article h3{font-size:19px;margin-top:22px}
.article p{font-size:16px;color:#31415c;line-height:1.9;margin-bottom:18px}
.article a{text-decoration:underline}
.article blockquote{margin:0 0 22px;padding:16px 20px;background:#f4f8ff;border-left:4px solid var(--blue);border-radius:0 12px 12px 0;color:#31415c;font-size:15.5px}
.article .ending{background:linear-gradient(135deg,#f0f6ff,#f7fbff);border:1px solid #dbe9ff;border-radius:16px;padding:22px;margin:26px 0}
.article .ending h2{margin-top:0;font-size:20px}
.article .ending p{margin-bottom:14px}
.pager{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;margin:26px 0 0;padding-top:22px;border-top:1px solid var(--line)}
.pager a,.pager span{font-size:14px;color:#5a6b85}
.pager a:hover{color:var(--blue)}
.related{margin-top:22px}
.related h2{font-size:20px}
.related ul li{padding:11px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.comments{margin-top:26px}
.comments h2{font-size:20px}
.cmt{display:flex;gap:12px;padding:16px 0;border-bottom:1px dashed var(--line)}
.cmt .cav{width:38px;height:38px;border-radius:50%;background:#eaf2ff;color:var(--blue);font-weight:700;display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.cmt b{font-size:14px}
.cmt .cdate{font-size:12px;color:#8b9ab2;margin-left:8px}
.cmt p{font-size:14px;margin:6px 0 0;color:#3b4d68}
.side{position:sticky;top:92px;display:grid;gap:18px}
.scard{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:0 10px 26px rgba(10,26,51,.05)}
.scard h3{font-size:16px;padding-left:11px;position:relative;margin-bottom:14px}
.scard h3:before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;border-radius:3px;background:linear-gradient(180deg,var(--blue),var(--sky))}
.toc{position:relative;padding-left:18px;border-left:1px solid #e4ebf6}
.toc a{display:block;position:relative;padding:7px 0;font-size:13.5px;color:#5a6b85;line-height:1.5}
.toc a:before{content:"";position:absolute;left:-22px;top:14px;width:7px;height:7px;border-radius:50%;background:#cfdcf0}
.toc a.on,.toc a:hover{color:var(--blue);font-weight:700}
.toc a.on:before{background:var(--blue);box-shadow:0 0 0 3px rgba(0,104,255,.16)}
.hot li{display:flex;gap:10px;padding:9px 0;align-items:flex-start;border-bottom:1px dashed #eef2f9}
.hot li:last-child{border-bottom:0}
.hot .rk{width:20px;height:20px;border-radius:6px;background:#eef2f9;color:#7d8ca3;font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;flex:0 0 auto;margin-top:3px;transition:.2s}
.hot li:nth-child(1) .rk{background:linear-gradient(135deg,#0068ff,#00b2ff);color:#fff}
.hot li:nth-child(2) .rk{background:linear-gradient(135deg,#ff9a3c,#ff6a00);color:#fff}
.hot li:nth-child(3) .rk{background:linear-gradient(135deg,#ffd66b,#f0a500);color:#fff}
.hot li:hover .rk{transform:scale(1.12)}
.hot a{font-size:13.5px;color:#3b4d68;line-height:1.55}
.hot li:hover a{color:var(--blue)}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tags a{font-size:12.5px;color:#5a6b85;border:1px solid var(--line);border-radius:999px;padding:5px 11px;background:#fbfdff}
.tags a:hover{color:var(--blue);border-color:#9cc4ff}
.smap h2{font-size:21px;margin-top:30px}
.smap ul{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 26px;margin-bottom:10px}
.smap li a{font-size:15px;color:#31415c}
.smap li a:hover{color:var(--blue)}
.prose{background:#fff;border:1px solid var(--line);border-radius:20px;padding:36px;max-width:920px;margin:0 auto}
.prose h2{font-size:23px;margin-top:28px}
.prose h3{font-size:18px;margin-top:20px}
.prose p,.prose li{font-size:15.5px;color:#31415c}
.prose ul{list-style:disc;padding-left:22px;margin-bottom:16px}
.prose li{margin-bottom:8px}
.err{text-align:center;padding:110px 20px 90px}
.err .code{font-size:110px;font-weight:800;line-height:1;background:linear-gradient(135deg,var(--blue),var(--sky));-webkit-background-clip:text;background-clip:text;color:transparent}
.err h1{font-size:28px;margin:14px 0 10px}
.err p{max-width:520px;margin:0 auto 24px}
html.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
html.js .reveal.in{opacity:1;transform:none}
@media(max-width:992px){
.hd-in{height:64px}
.nav{position:fixed;left:0;right:0;top:64px;display:none;flex-direction:column;align-items:stretch;gap:2px;background:#fff;padding:12px 16px 26px;box-shadow:0 22px 40px rgba(10,26,51,.16);max-height:calc(100vh - 64px);overflow:auto;border-top:1px solid var(--line)}
.navcheck:checked~.nav{display:flex}
.nav>a,.dd>label{padding:13px 12px;font-size:16px;justify-content:space-between;border-radius:10px}
.dd ul{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 0 12px;min-width:0;display:none}
.dd:hover ul{display:none}
.ddc:checked~ul{display:block}
.burger{display:flex}
.navcheck:checked~.burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.navcheck:checked~.burger span:nth-child(2){opacity:0}
.navcheck:checked~.burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.hd .btn-hd{display:none}
.hero-in,.dl-hero-in,.split{grid-template-columns:1fr;gap:34px}
.hero-in{padding:44px 20px 56px}
.hero h1{font-size:34px}
h2{font-size:28px}
.sec{padding:60px 0}
.g4,.g3{grid-template-columns:repeat(2,1fr)}
.news-grid,.steps,.dl-list,.req{grid-template-columns:repeat(2,1fr)}
.article-wrap{grid-template-columns:1fr;gap:26px}
.side{position:static;grid-template-columns:1fr;top:auto}
.article{padding:24px}
.article h1{font-size:26px}
.article h2{font-size:22px}
.ft-grid{grid-template-columns:1fr 1fr;gap:26px}
.cta{padding:38px 24px}
.smap ul{grid-template-columns:1fr}
}
@media(max-width:768px){
.hero h1{font-size:29px}
.hero-stats{grid-template-columns:repeat(3,1fr)}
.hero-stats b{font-size:18px}
.g4,.g3,.g2,.news-grid,.steps,.dl-list,.req,.panel .mini{grid-template-columns:1fr}
.hero-cta .btn{flex:1}
.sec{padding:50px 0}
h2{font-size:25px}
.article{padding:20px}
.article p{font-size:15.5px}
.hero-stats div{padding:11px 12px}
.hero-stats span{font-size:11.5px}
.ft-grid{grid-template-columns:1fr}
.ft-bot{flex-direction:column;align-items:flex-start}
.phero{padding:40px 0 34px}
.phero h1{font-size:27px}
.prose{padding:24px}
.err .code{font-size:80px}
}
@media(max-width:480px){
.wrap{padding:0 15px}
.hero h1{font-size:25px;letter-spacing:-.4px}
.hero-sub{font-size:15.5px}
.btn{width:100%;padding:13px 18px}
.hero-cta{flex-direction:column}
.hero-stats{grid-template-columns:1fr;gap:10px}
.hero-stats div{display:flex;justify-content:space-between;align-items:center;padding:12px 14px}
.hero-stats b{font-size:19px;margin:0}
.composer input[type=text]{font-size:16px}
.article h1{font-size:22px}
.article h2{font-size:20px}
.article{padding:16px}
.sec-head h2{font-size:22px}
.cta h2{font-size:23px}
.totop{right:14px;bottom:16px}
}