*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#229ed9;
  --primary-dark:#1a7fb3;
  --accent:#38bdf8;
  --bg:#f0f6fa;
  --surface:#fff;
  --text:#152032;
  --muted:#5c6b7a;
  --border:#dce6ef;
  --radius:14px;
  --shadow:0 6px 28px rgba(20,80,120,.09);
  --max:1140px;
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.75}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(0,0,0,.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.18rem;color:var(--text)}
.logo img{width:38px;height:38px;border-radius:10px}
.nav{display:flex;align-items:center;gap:30px}
.nav a{color:var(--muted);font-size:.94rem;font-weight:500}
.nav a:hover,.nav a.active{color:var(--primary)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text);margin:5px 0;border-radius:2px}

.hero{background:linear-gradient(140deg,#229ed9 0%,#1574a8 50%,#0c4a6e 100%);color:#fff;padding:76px 0 84px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;left:-60px;bottom:-100px;width:320px;height:320px;background:rgba(255,255,255,.05);border-radius:50%}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:2.45rem;line-height:1.22;margin-bottom:18px;font-weight:800;letter-spacing:-.02em}
.hero p{font-size:1.06rem;opacity:.93;margin-bottom:30px;max-width:500px}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 30px;border-radius:50px;font-weight:600;font-size:.95rem;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:#fff;color:var(--primary);box-shadow:0 6px 20px rgba(0,0,0,.18)}
.btn-primary:hover{color:var(--primary-dark)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.55)}
.btn-outline:hover{background:rgba(255,255,255,.1);border-color:#fff}
.hero-visual{text-align:center}
.hero-device{width:240px;margin:0 auto;filter:drop-shadow(0 24px 48px rgba(0,0,0,.28))}
.hero-badge{display:inline-block;background:rgba(255,255,255,.14);padding:7px 18px;border-radius:24px;font-size:.84rem;margin-bottom:22px;backdrop-filter:blur(6px)}

.section{padding:76px 0}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:1.9rem;margin-bottom:12px;font-weight:700}
.section-title p{color:var(--muted);max-width:580px;margin:0 auto;font-size:.98rem}

.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.feature-card{background:var(--surface);border-radius:var(--radius);padding:34px 26px;box-shadow:var(--shadow);border:1px solid var(--border);transition:transform .22s,border-color .22s}
.feature-card:hover{transform:translateY(-5px);border-color:#b8dff5}
.feature-icon{width:54px;height:54px;background:linear-gradient(145deg,var(--accent),var(--primary));border-radius:16px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:1.55rem}
.feature-card h3{font-size:1.12rem;margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:.91rem}

.download-section{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.platform-card{text-align:center;padding:34px 22px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg);transition:border-color .2s,box-shadow .2s,transform .2s}
.platform-card:hover{border-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-3px)}
.platform-card .icon{font-size:2.5rem;margin-bottom:14px}
.platform-card h3{font-size:1.02rem;margin-bottom:8px}
.platform-card p{font-size:.83rem;color:var(--muted);margin-bottom:18px;line-height:1.6}
.btn-download{display:inline-block;padding:11px 26px;background:var(--primary);color:#fff;border-radius:50px;font-size:.88rem;font-weight:600}
.btn-download:hover{background:var(--primary-dark);color:#fff}

.faq-list{max-width:780px;margin:0 auto}
.faq-item{background:var(--surface);border-radius:var(--radius);margin-bottom:14px;border:1px solid var(--border);overflow:hidden}
.faq-q{padding:20px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;user-select:none;font-size:.96rem}
.faq-q::after{content:"+";font-size:1.35rem;color:var(--primary);transition:transform .2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .32s,padding .32s;color:var(--muted);font-size:.93rem}
.faq-item.open .faq-a{max-height:320px;padding:0 24px 20px}

.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.article-card{background:var(--surface);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);transition:transform .2s}
.article-card:hover{transform:translateY(-4px)}
.article-card-body{padding:24px}
.article-card h3{font-size:1.06rem;margin-bottom:10px;line-height:1.45}
.article-card p{font-size:.89rem;color:var(--muted);margin-bottom:16px}
.article-meta{font-size:.79rem;color:var(--muted);margin-bottom:12px}
.read-more{font-size:.89rem;font-weight:600}

.article-page{background:var(--surface);border-radius:var(--radius);padding:42px 50px;box-shadow:var(--shadow);border:1px solid var(--border);max-width:840px;margin:0 auto}
.article-page h1{font-size:1.78rem;margin-bottom:14px;line-height:1.38}
.article-page .meta{color:var(--muted);font-size:.86rem;margin-bottom:30px;padding-bottom:22px;border-bottom:1px solid var(--border)}
.article-page h2{font-size:1.28rem;margin:30px 0 14px;color:var(--text)}
.article-page p,.article-page li{color:#2d3f52;margin-bottom:15px;font-size:.96rem}
.article-page ul,.article-page ol{padding-left:24px;margin-bottom:18px}
.article-page .tip{background:#e8f5fc;border-left:4px solid var(--primary);padding:16px 20px;border-radius:0 10px 10px 0;margin:22px 0;font-size:.91rem;color:#1e4a63}
.dynamic-block{background:#edf6fc;border-radius:10px;padding:18px 22px;margin:22px 0;font-size:.91rem;color:var(--muted);border:1px dashed #a8d4ef}

.breadcrumb{padding:18px 0;font-size:.86rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{margin:0 8px}

.site-footer{background:#152032;color:rgba(255,255,255,.72);padding:52px 0 28px;margin-top:44px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:44px;margin-bottom:38px}
.footer-grid h4{color:#fff;margin-bottom:16px;font-size:.96rem}
.footer-grid p,.footer-grid a{font-size:.88rem;color:rgba(255,255,255,.62);line-height:2.1}
.footer-grid a:hover{color:#fff}
.footer-bottom{text-align:center;padding-top:26px;border-top:1px solid rgba(255,255,255,.1);font-size:.82rem;color:rgba(255,255,255,.42)}

.page-header{background:linear-gradient(140deg,#229ed9,#1574a8);color:#fff;padding:52px 0;text-align:center}
.page-header h1{font-size:1.95rem;margin-bottom:10px}
.page-header p{opacity:.88;font-size:.96rem}

.sitemap-list{max-width:680px;margin:0 auto;background:var(--surface);border-radius:var(--radius);padding:36px 44px;box-shadow:var(--shadow);border:1px solid var(--border)}
.sitemap-list h2{font-size:1.12rem;margin:28px 0 14px;color:var(--primary)}
.sitemap-list h2:first-child{margin-top:0}
.sitemap-list ul{list-style:none;padding:0}
.sitemap-list li{padding:10px 0;border-bottom:1px solid var(--border)}
.sitemap-list li:last-child{border-bottom:none}
.sitemap-list a{font-weight:500}

.tutorial-layout{display:grid;grid-template-columns:250px 1fr;gap:34px;align-items:start}
.tutorial-toc{position:sticky;top:86px;background:var(--surface);border-radius:var(--radius);padding:26px 22px;border:1px solid var(--border);box-shadow:var(--shadow)}
.tutorial-toc h3{font-size:.96rem;margin-bottom:16px;color:var(--text)}
.tutorial-toc ul{list-style:none;padding:0}
.tutorial-toc li{margin-bottom:8px}
.tutorial-toc a{font-size:.87rem;color:var(--muted);display:block;padding:7px 12px;border-radius:8px;transition:background .2s,color .2s}
.tutorial-toc a:hover,.tutorial-toc a.active{background:#e8f5fc;color:var(--primary)}
.tutorial-content{background:var(--surface);border-radius:var(--radius);padding:42px 46px;box-shadow:var(--shadow);border:1px solid var(--border)}
.tutorial-content h2{font-size:1.38rem;margin:38px 0 16px;padding-top:10px;border-top:1px solid var(--border)}
.tutorial-content h2:first-of-type{margin-top:0;border-top:none;padding-top:0}
.tutorial-content h3{font-size:1.1rem;margin:24px 0 12px;color:var(--primary-dark)}
.tutorial-content p,.tutorial-content li{color:#2d3f52;font-size:.96rem;margin-bottom:13px}
.tutorial-content ul,.tutorial-content ol{padding-left:24px;margin-bottom:18px}
.step-box{display:flex;gap:18px;background:var(--bg);border-radius:var(--radius);padding:22px 24px;margin-bottom:16px;border:1px solid var(--border)}
.step-num{flex-shrink:0;width:38px;height:38px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.96rem}
.step-body h4{font-size:1.02rem;margin-bottom:8px}
.step-body p{margin-bottom:0;font-size:.9rem;color:var(--muted)}
.related-articles{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:36px}
.related-articles a{display:block;padding:20px;background:var(--bg);border-radius:var(--radius);border:1px solid var(--border);font-size:.91rem;font-weight:600;color:var(--text);transition:border-color .2s}
.related-articles a:hover{border-color:var(--primary);color:var(--primary)}
.related-articles span{display:block;font-weight:400;font-size:.83rem;color:var(--muted);margin-top:8px}

@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;text-align:center}
  .hero p{margin:0 auto 30px}
  .hero-btns{justify-content:center}
  .hero-visual{display:none}
  .features-grid,.platform-grid,.article-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .article-page{padding:30px 24px}
  .tutorial-layout{grid-template-columns:1fr}
  .tutorial-toc{position:static}
  .tutorial-content{padding:30px 24px}
  .related-articles{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav{display:none;position:absolute;top:66px;left:0;right:0;background:var(--surface);flex-direction:column;padding:18px 22px;gap:18px;border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav-toggle{display:block}
  .hero h1{font-size:1.8rem}
  .platform-grid{grid-template-columns:repeat(2,1fr)}
}