:root{--c-primary:#2b5bff;--c-primary-d:#1d44c9;--c-accent:#7b4dff;--c-bg:#f5f7fb;--c-card:#ffffff;--c-text:#1a1f36;--c-muted:#5b6478;--c-border:#e3e8f2;--c-green:#16a34a;--c-orange:#ea7a0a;--radius:14px;--shadow:0 6px 24px rgba(20,30,80,.08);--maxw:1180px}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--c-text);background:var(--c-bg);line-height:1.75;font-size:16px}
a{color:var(--c-primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--c-primary-d)}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--c-border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px;color:var(--c-text)}
.logo img{width:34px;height:34px;border-radius:8px}
.logo span b{color:var(--c-primary)}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:8px 14px;border-radius:8px;font-weight:600;color:var(--c-text);font-size:15px}
.main-nav a:hover,.main-nav a.active{background:rgba(43,91,255,.08);color:var(--c-primary)}
.lang-switch{display:flex;align-items:center;gap:4px;margin-left:6px}
.lang-switch a{font-size:13px;font-weight:600;padding:5px 9px;border-radius:6px;border:1px solid var(--c-border);color:var(--c-muted)}
.lang-switch a.active,.lang-switch a:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
.nav-toggle{display:none}
/* hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#2b5bff 0%,#7b4dff 60%,#b46bff 100%);color:#fff;padding:72px 0 96px}
.hero::after{content:"";position:absolute;right:-120px;top:-80px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.12)}
.hero::before{content:"";position:absolute;left:-80px;bottom:-120px;width:360px;height:360px;border-radius:50%;background:rgba(255,255,255,.1)}
.hero .container{position:relative;z-index:1}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;margin-bottom:18px}
.hero p{font-size:18px;max-width:680px;opacity:.94;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:10px;font-weight:700;font-size:16px;cursor:pointer;border:0}
.btn-primary{background:#fff;color:var(--c-primary)}
.btn-primary:hover{background:#eef2ff;color:var(--c-primary-d)}
.btn-ghost{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.28);color:#fff}
.btn-lg{padding:16px 32px;font-size:17px}
.hero-stats{display:flex;gap:40px;margin-top:44px;flex-wrap:wrap}
.hero-stats div b{display:block;font-size:30px;font-weight:800}
.hero-stats div span{font-size:14px;opacity:.85}
/* section */
.section{padding:64px 0}
.section-head{margin-bottom:36px}
.section-head h2{font-size:32px;font-weight:800;margin-bottom:10px}
.section-head p{color:var(--c-muted);font-size:16px}
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(20,30,80,.12)}
.card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.card h3 a{color:var(--c-text)}
.card h3 a:hover{color:var(--c-primary)}
.card p{color:var(--c-muted);font-size:15px}
.card-icon{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px;background:rgba(43,91,255,.1)}
/* article card */
.post-card{display:flex;flex-direction:column;overflow:hidden}
.post-card .thumb{height:180px;background-size:cover;background-position:center;background-color:#e8ecf5}
.post-card .post-body{padding:20px 22px}
.post-card .post-meta{font-size:13px;color:var(--c-muted);margin-bottom:8px}
.post-card h3{font-size:18px;line-height:1.4}
.post-card p{font-size:14px}
/* feature split */
.split{display:flex;align-items:center;gap:48px}
.split .split-txt{flex:1}
.split .split-img{flex:1}
.split-img .ph{background:linear-gradient(135deg,#eef2ff,#f3e8ff);border-radius:var(--radius);min-height:280px;display:flex;align-items:center;justify-content:center;font-size:72px;color:#c3cdf5}
/* breadcrumb */
.breadcrumb{padding:14px 0;font-size:14px;color:var(--c-muted)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumb li+li::before{content:"›";margin-right:6px;color:#b6becf}
.breadcrumb a{color:var(--c-muted)}
.breadcrumb a:hover{color:var(--c-primary)}
/* page hero */
.page-hero{background:linear-gradient(135deg,#2b5bff,#7b4dff);color:#fff;padding:48px 0}
.page-hero h1{font-size:36px;font-weight:800;margin-bottom:10px}
.page-hero p{opacity:.92;font-size:17px;max-width:720px}
/* faq */
.faq-item{background:var(--c-card);border:1px solid var(--c-border);border-radius:12px;margin-bottom:14px;overflow:hidden}
.faq-item summary{padding:18px 22px;font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;font-size:17px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"＋";color:var(--c-primary);font-size:20px}
.faq-item[open] summary::after{content:"－"}
.faq-body{padding:0 22px 20px;color:var(--c-muted);font-size:15px}
.faq-body ol{padding-left:20px;margin-top:8px}
.faq-body ol li{margin-bottom:8px}
.cat-title{font-size:22px;font-weight:800;margin:36px 0 16px;padding-left:14px;border-left:4px solid var(--c-primary)}
/* article detail */
.article-body{max-width:760px;margin:0 auto}
.article-body h1{font-size:34px;font-weight:800;line-height:1.3;margin-bottom:16px}
.article-body .art-meta{color:var(--c-muted);font-size:14px;margin-bottom:28px;padding-bottom:18px;border-bottom:1px solid var(--c-border)}
.article-body h2{font-size:24px;font-weight:700;margin:34px 0 14px}
.article-body h3{font-size:20px;font-weight:700;margin:26px 0 12px}
.article-body p{margin-bottom:16px;color:#2a3042}
.article-body ul,.article-body ol{padding-left:22px;margin-bottom:16px}
.article-body li{margin-bottom:8px}
.article-body img{border-radius:12px;margin:20px 0}
.article-body blockquote{border-left:4px solid var(--c-primary);background:#f0f4ff;padding:14px 18px;border-radius:8px;margin:18px 0;color:var(--c-muted)}
.article-body code{background:#eef1f7;padding:2px 6px;border-radius:5px;font-family:ui-monospace,monospace;font-size:.9em}
.article-body pre{background:#0f1420;color:#e6e9f2;padding:18px;border-radius:10px;overflow-x:auto;margin:18px 0;font-size:14px}
/* download list */
.dl-table{width:100%;border-collapse:collapse;background:var(--c-card);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.dl-table th,.dl-table td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--c-border);font-size:15px}
.dl-table th{background:#f0f4ff;font-weight:700}
.dl-table tr:last-child td{border-bottom:0}
.tag{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:700}
.tag-green{background:#e8f7ee;color:var(--c-green)}
.tag-blue{background:#e8efff;color:var(--c-primary)}
.tag-orange{background:#fdf1e3;color:var(--c-orange)}
/* cta */
.cta{background:linear-gradient(135deg,#2b5bff,#7b4dff);color:#fff;border-radius:var(--radius);padding:48px;text-align:center}
.cta h2{font-size:28px;font-weight:800;margin-bottom:12px}
.cta p{opacity:.92;margin-bottom:24px}
.cta .btn{background:#fff;color:var(--c-primary)}
/* footer */
.site-footer{background:#10142a;color:#c3c9dd;padding:56px 0 28px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:36px}
.footer-grid h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer-grid a{display:block;color:#c3c9dd;padding:4px 0;font-size:14px}
.footer-grid a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;font-size:13px;color:#8b92a8;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-bottom a{color:#8b92a8}
/* sitemap */
.sitemap-list{column-count:2;column-gap:40px}
.sitemap-list a{display:block;padding:6px 0;color:var(--c-text);border-bottom:1px dashed var(--c-border)}
.sitemap-list a:hover{color:var(--c-primary)}
/* toc */
.toc{background:var(--c-card);border:1px solid var(--c-border);border-radius:12px;padding:22px;margin-bottom:28px}
.toc h4{margin-bottom:12px}
.toc a{display:block;padding:4px 0;color:var(--c-muted);font-size:14px}
.toc a:hover{color:var(--c-primary)}
/* notice */
.notice{background:#fff7e6;border:1px solid #ffe0a3;color:#8a5a00;padding:14px 18px;border-radius:10px;margin:18px 0;font-size:15px}
/* pagination */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:36px}
.pagination a{padding:9px 15px;border:1px solid var(--c-border);border-radius:8px;font-weight:600;color:var(--c-text)}
.pagination a.active,.pagination a:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
/* responsive */
@media(max-width:960px){
.grid-4{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(2,1fr)}
.split{flex-direction:column}
.footer-grid{grid-template-columns:1fr 1fr}
.sitemap-list{column-count:1}
.hero h1{font-size:34px}
}
@media(max-width:640px){
.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
.main-nav{display:none}
.nav-toggle{display:block;font-size:26px;background:none;border:none;cursor:pointer;color:var(--c-text)}
.footer-grid{grid-template-columns:1fr}
.hero{padding:48px 0 64px}
.section{padding:44px 0}
}