*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --primary-light:#3b82f6;
  --accent:#06b6d4;
  --bg:#f8fafc;
  --bg-dark:#0f172a;
  --text:#1e293b;
  --text-light:#64748b;
  --white:#ffffff;
  --border:#e2e8f0;
  --shadow:0 4px 24px rgba(15,23,42,.08);
  --radius:12px;
  --transition:.3s ease;
}
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:1.7;font-size:16px}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* Header */
.site-header{background:var(--white);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:0 1px 8px rgba(0,0,0,.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.4rem;font-weight:700;color:var(--bg-dark)}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--white);font-weight:800;font-size:1.1rem}
.nav-links{display:flex;align-items:center;gap:32px;list-style:none}
.nav-links a{color:var(--text);font-weight:500;font-size:.95rem}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.btn-download{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:var(--white)!important;padding:10px 24px;border-radius:8px;font-weight:600;font-size:.9rem;transition:transform var(--transition),box-shadow var(--transition);border:none;cursor:pointer}
.btn-download:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(37,99,235,.35);color:var(--white)}
.mobile-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text)}

/* Hero */
.hero{background:linear-gradient(135deg,#0f172a 0%,#1e3a5f 50%,#1e40af 100%);color:var(--white);padding:80px 0 100px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(59,130,246,.15) 0%,transparent 70%);border-radius:50%}
.hero-content{position:relative;z-index:1;text-align:center;max-width:800px;margin:0 auto}
.hero h1{font-size:2.8rem;font-weight:800;line-height:1.2;margin-bottom:20px;letter-spacing:-.02em}
.hero-sub{font-size:1.15rem;color:rgba(255,255,255,.8);margin-bottom:36px;line-height:1.8}
.hero-features{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-bottom:40px}
.hero-tag{background:rgba(255,255,255,.1);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.15);padding:10px 20px;border-radius:50px;font-size:.9rem}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{background:linear-gradient(135deg,var(--primary-light),var(--accent));color:var(--white);padding:14px 36px;border-radius:10px;font-weight:600;font-size:1.05rem;border:none;cursor:pointer;transition:transform var(--transition),box-shadow var(--transition)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(59,130,246,.4)}
.btn-outline{background:transparent;color:var(--white);padding:14px 36px;border-radius:10px;font-weight:600;font-size:1.05rem;border:2px solid rgba(255,255,255,.3);cursor:pointer;transition:all var(--transition)}
.btn-outline:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.6)}

/* Sections */
.section{padding:80px 0}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;font-weight:700;color:var(--bg-dark);margin-bottom:12px}
.section-title p{color:var(--text-light);font-size:1.05rem;max-width:600px;margin:0 auto}

/* Features Grid */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:28px}
.feature-card{background:var(--white);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);transition:transform var(--transition),box-shadow var(--transition);border:1px solid var(--border)}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(15,23,42,.12)}
.feature-icon{width:52px;height:52px;background:linear-gradient(135deg,rgba(37,99,235,.1),rgba(6,182,212,.1));border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:18px}
.feature-card h3{font-size:1.15rem;font-weight:600;margin-bottom:10px;color:var(--bg-dark)}
.feature-card p{color:var(--text-light);font-size:.92rem;line-height:1.7}

/* Server Network */
.server-section{background:var(--bg-dark);color:var(--white);padding:80px 0;text-align:center}
.server-section h2{font-size:2rem;margin-bottom:16px}
.server-section p{color:rgba(255,255,255,.7);margin-bottom:40px}
.server-stats{display:flex;flex-wrap:wrap;justify-content:center;gap:40px}
.stat-item{text-align:center}
.stat-num{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary-light),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-label{color:rgba(255,255,255,.6);font-size:.9rem;margin-top:4px}

/* Reviews */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.review-card{background:var(--white);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid var(--border)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:var(--white);font-weight:600;font-size:.9rem}
.review-name{font-weight:600;font-size:.95rem}
.review-role{color:var(--text-light);font-size:.82rem}
.review-text{color:var(--text-light);font-size:.9rem;line-height:1.7;margin-bottom:12px}
.stars{color:#f59e0b;font-size:.9rem;letter-spacing:2px}

/* Pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:28px;max-width:960px;margin:0 auto}
.pricing-card{background:var(--white);border-radius:var(--radius);padding:36px;text-align:center;box-shadow:var(--shadow);border:1px solid var(--border);position:relative;transition:transform var(--transition)}
.pricing-card:hover{transform:translateY(-4px)}
.pricing-card.featured{border-color:var(--primary);box-shadow:0 8px 30px rgba(37,99,235,.15)}
.pricing-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--primary),var(--accent));color:var(--white);padding:4px 16px;border-radius:20px;font-size:.78rem;font-weight:600}
.pricing-card h3{font-size:1.2rem;margin-bottom:8px;color:var(--bg-dark)}
.pricing-price{font-size:2.2rem;font-weight:800;color:var(--primary);margin:16px 0}
.pricing-price span{font-size:.9rem;color:var(--text-light);font-weight:400}
.pricing-note{color:var(--text-light);font-size:.85rem;margin-top:16px}

/* Articles */
.articles-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:28px}
.article-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);transition:transform var(--transition)}
.article-card:hover{transform:translateY(-4px)}
.article-card-body{padding:24px}
.article-date{color:var(--text-light);font-size:.82rem;margin-bottom:8px}
.article-card h3{font-size:1.1rem;font-weight:600;margin-bottom:10px;color:var(--bg-dark);line-height:1.4}
.article-card p{color:var(--text-light);font-size:.88rem;line-height:1.7;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.read-more{color:var(--primary);font-weight:600;font-size:.88rem}
.read-more:hover{text-decoration:underline}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:12px;border:1px solid var(--border);overflow:hidden}
.faq-question{padding:20px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background var(--transition)}
.faq-question:hover{background:rgba(37,99,235,.03)}
.faq-question::after{content:"+";font-size:1.3rem;color:var(--primary);transition:transform var(--transition)}
.faq-item.open .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height var(--transition),padding var(--transition);color:var(--text-light);font-size:.92rem;line-height:1.8}
.faq-item.open .faq-answer{max-height:500px;padding:0 24px 20px}

/* CTA */
.cta-section{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:var(--white);padding:60px 0;text-align:center}
.cta-section h2{font-size:1.8rem;margin-bottom:12px}
.cta-section p{opacity:.85;margin-bottom:28px}

/* Footer */
.site-footer{background:var(--bg-dark);color:rgba(255,255,255,.7);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:32px}
.footer-col h4{color:var(--white);font-size:1rem;margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{color:rgba(255,255,255,.6);font-size:.88rem}
.footer-col a:hover{color:var(--white)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;text-align:center;font-size:.82rem;color:rgba(255,255,255,.4)}

/* Download Page */
.download-hero{padding:60px 0;background:linear-gradient(135deg,#0f172a,#1e40af);color:var(--white);text-align:center}
.download-hero h1{font-size:2.2rem;margin-bottom:12px}
.download-hero p{opacity:.8;font-size:1.05rem}
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-top:40px}
.platform-card{background:var(--white);border-radius:var(--radius);padding:32px;text-align:center;box-shadow:var(--shadow);border:1px solid var(--border)}
.platform-icon{font-size:2.5rem;margin-bottom:16px}
.platform-card h3{font-size:1.1rem;margin-bottom:8px;color:var(--bg-dark)}
.platform-card p{color:var(--text-light);font-size:.85rem;margin-bottom:20px}
.steps-list{max-width:700px;margin:40px auto 0;counter-reset:step}
.step-item{display:flex;gap:20px;margin-bottom:28px;align-items:flex-start}
.step-num{flex-shrink:0;width:36px;height:36px;background:var(--primary);color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem}
.step-content h4{font-weight:600;margin-bottom:6px;color:var(--bg-dark)}
.step-content p{color:var(--text-light);font-size:.9rem}

/* Article Page */
.article-header{padding:60px 0 40px;background:var(--white);border-bottom:1px solid var(--border)}
.article-header h1{font-size:2rem;font-weight:700;color:var(--bg-dark);margin-bottom:12px;line-height:1.3}
.article-meta{color:var(--text-light);font-size:.88rem;display:flex;gap:20px;flex-wrap:wrap}
.article-body{max-width:780px;margin:0 auto;padding:48px 24px}
.article-body h2{font-size:1.4rem;font-weight:600;margin:32px 0 16px;color:var(--bg-dark)}
.article-body h3{font-size:1.15rem;font-weight:600;margin:24px 0 12px;color:var(--bg-dark)}
.article-body p{margin-bottom:16px;color:var(--text);line-height:1.8}
.article-body ul,.article-body ol{margin:0 0 16px 24px;color:var(--text)}
.article-body li{margin-bottom:8px;line-height:1.7}
.article-body blockquote{border-left:4px solid var(--primary);padding:16px 20px;background:rgba(37,99,235,.04);border-radius:0 8px 8px 0;margin:20px 0;color:var(--text-light);font-size:.95rem}
.breadcrumb{padding:16px 0;font-size:.85rem;color:var(--text-light)}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}

/* Responsive */
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:var(--white);flex-direction:column;padding:20px;gap:16px;border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
  .nav-links.show{display:flex}
  .mobile-toggle{display:block}
  .hero h1{font-size:2rem}
  .hero{padding:60px 0 80px}
  .section{padding:60px 0}
  .article-header h1{font-size:1.5rem}
}