*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --accent:#7c3aed;
  --bg:#f8fafc;
  --text:#1e293b;
  --text-light:#64748b;
  --white:#ffffff;
  --radius:12px;
  --shadow:0 4px 24px rgba(37,99,235,.12);
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.7}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;display:block}
.container{max-width:1140px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:var(--white);box-shadow:0 1px 8px rgba(0,0,0,.06);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:1.5rem;font-weight:700;color:var(--primary);display:flex;align-items:center;gap:8px}
.logo span{color:var(--accent)}
.nav-links{display:flex;gap:28px;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-nav{background:linear-gradient(135deg,var(--primary),var(--accent));color:var(--white)!important;padding:8px 22px;border-radius:8px;font-weight:600}
.btn-download-nav:hover{opacity:.9;color:var(--white)!important}
.menu-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text)}

/* Hero */
.hero{background:linear-gradient(135deg,#1e3a8a 0%,#4f46e5 50%,#7c3aed 100%);color:var(--white);padding:80px 0 90px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 70% 50%,rgba(255,255,255,.08) 0%,transparent 70%);pointer-events:none;z-index:0}
.hero .container{position:relative;z-index:2}
.hero-bg-decor{position:absolute;inset:0;pointer-events:none;z-index:1}
.hero-orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.45}
.hero-orb-1{width:320px;height:320px;background:#60a5fa;top:-80px;right:15%;animation:heroFloat 8s ease-in-out infinite}
.hero-orb-2{width:240px;height:240px;background:#a78bfa;bottom:-60px;right:35%;animation:heroFloat 10s ease-in-out infinite reverse}
.hero-orb-3{width:180px;height:180px;background:#818cf8;top:30%;right:5%;animation:heroFloat 12s ease-in-out infinite 2s}
.hero-icon-wrap{position:absolute;right:10%;top:50%;transform:translateY(-50%);width:220px;height:220px;display:flex;align-items:center;justify-content:center}
.hero-icon-ring{position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.18)}
.hero-icon-ring-1{width:100%;height:100%;animation:heroSpin 20s linear infinite}
.hero-icon-ring-2{width:78%;height:78%;border-color:rgba(255,255,255,.12);animation:heroSpin 15s linear infinite reverse}
.hero-icon-ring-3{width:56%;height:56%;border-color:rgba(255,255,255,.25);border-style:dashed;animation:heroSpin 25s linear infinite}
.hero-deco-icon{position:relative;z-index:2;width:100px;height:100px;object-fit:contain;filter:drop-shadow(0 0 24px rgba(96,165,250,.55)) drop-shadow(0 4px 16px rgba(0,0,0,.2));animation:heroIconGlow 4s ease-in-out infinite}
@keyframes heroIconGlow{0%,100%{filter:drop-shadow(0 0 24px rgba(96,165,250,.55)) drop-shadow(0 4px 16px rgba(0,0,0,.2));transform:scale(1)}50%{filter:drop-shadow(0 0 36px rgba(96,165,250,.75)) drop-shadow(0 4px 20px rgba(0,0,0,.15));transform:scale(1.04)}}
@keyframes heroFloat{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-20px) scale(1.05)}}
@keyframes heroSpin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
.hero h1{font-size:2.6rem;font-weight:800;margin-bottom:16px;line-height:1.3}
.hero .subtitle{font-size:1.15rem;opacity:.92;margin-bottom:32px;max-width:640px;margin-left:auto;margin-right:auto}
.hero-features{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-bottom:40px}
.hero-tag{background:rgba(255,255,255,.15);backdrop-filter:blur(4px);padding:10px 20px;border-radius:30px;font-size:.9rem;border:1px solid rgba(255,255,255,.2)}
.btn-primary{display:inline-block;background:var(--white);color:var(--primary);padding:14px 36px;border-radius:10px;font-weight:700;font-size:1.05rem;transition:transform .2s,box-shadow .2s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2);color:var(--primary-dark)}
.btn-outline{display:inline-block;border:2px solid var(--white);color:var(--white);padding:12px 32px;border-radius:10px;font-weight:600;margin-left:12px}
.btn-outline:hover{background:rgba(255,255,255,.15);color:var(--white)}

/* Sections */
section{padding:72px 0}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;font-weight:700;margin-bottom:12px}
.section-title p{color:var(--text-light);max-width:560px;margin:0 auto}

/* Features */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:28px}
.feature-card{background:var(--white);padding:32px 28px;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;transition:transform .2s}
.feature-card:hover{transform:translateY(-4px)}
.feature-icon{width:56px;height:56px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:14px;display:flex;align-items:center;justify-content:center;margin:0 auto 18px;font-size:1.5rem}
.feature-card h3{font-size:1.1rem;margin-bottom:10px}
.feature-card p{color:var(--text-light);font-size:.92rem}

/* Server map */
.server-section{background:var(--white)}
.server-visual{background:linear-gradient(135deg,#eff6ff,#f5f3ff);border-radius:var(--radius);padding:48px;text-align:center}
.server-dots{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:24px}
.server-dot{background:var(--primary);color:var(--white);padding:8px 18px;border-radius:20px;font-size:.85rem;font-weight:500}

/* Reviews */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.review-card{background:var(--white);padding:28px;border-radius:var(--radius);box-shadow:var(--shadow)}
.review-card .role{color:var(--text-light);font-size:.85rem;margin-bottom:8px}
.review-card .stars{color:#f59e0b;margin-top:12px;letter-spacing:2px}

/* Pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:28px;max-width:900px;margin:0 auto}
.price-card{background:var(--white);padding:36px 28px;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;border:2px solid transparent;transition:border-color .2s}
.price-card.featured{border-color:var(--primary);position:relative}
.price-card .badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--accent);color:var(--white);padding:4px 16px;border-radius:12px;font-size:.8rem;font-weight:600}
.price-card h3{font-size:1.2rem;margin-bottom:8px}
.price-card .amount{font-size:2.4rem;font-weight:800;color:var(--primary);margin:16px 0}
.price-card .amount small{font-size:1rem;font-weight:400;color:var(--text-light)}
.price-card .btn-price{display:block;background:linear-gradient(135deg,var(--primary),var(--accent));color:var(--white);padding:12px;border-radius:8px;font-weight:600;margin-top:20px}
.price-card .btn-price:hover{opacity:.9;color:var(--white)}
.pricing-note{text-align:center;margin-top:28px;color:var(--text-light);font-size:.88rem}

/* News */
.news-list{display:grid;gap:20px;max-width:800px;margin:0 auto}
.news-item{background:var(--white);padding:24px 28px;border-radius:var(--radius);box-shadow:var(--shadow);display:block;color:inherit;transition:transform .2s}
.news-item:hover{transform:translateX(4px);color:inherit}
.news-date{color:var(--text-light);font-size:.85rem;margin-bottom:6px}
.news-item h3{font-size:1.05rem;margin-bottom:8px;color:var(--primary)}
.news-item p{color:var(--text-light);font-size:.9rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* FAQ */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:var(--white);margin-bottom:12px;border-radius:var(--radius);box-shadow:0 2px 8px rgba(0,0,0,.04);overflow:hidden}
.faq-question{padding:20px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-question::after{content:"+";font-size:1.3rem;color:var(--primary);transition:transform .2s}
.faq-item.open .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .3s,padding .3s;color:var(--text-light);font-size:.92rem}
.faq-item.open .faq-answer{max-height:300px;padding:0 24px 20px}

/* CTA */
.cta-section{background:linear-gradient(135deg,var(--primary),var(--accent));color:var(--white);text-align:center;padding:64px 0}
.cta-section h2{font-size:1.8rem;margin-bottom:20px}
.cta-section .btn-primary{color:var(--primary)}

/* Footer */
.site-footer{background:#0f172a;color:#94a3b8;padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:32px}
.footer-grid h4{color:var(--white);margin-bottom:14px;font-size:.95rem}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:8px}
.footer-grid a{color:#94a3b8;font-size:.88rem}
.footer-grid a:hover{color:var(--white)}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid #1e293b;font-size:.82rem}

/* Download page */
.download-hero{padding:60px 0 40px;text-align:center}
.download-hero h1{font-size:2.2rem;margin-bottom:12px}
.download-hero p{color:var(--text-light);max-width:560px;margin:0 auto}
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;max-width:900px;margin:40px auto}
.platform-card{background:var(--white);padding:36px 24px;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center}
.platform-icon{font-size:2.8rem;margin-bottom:16px}
.platform-card h3{margin-bottom:8px}
.platform-card p{color:var(--text-light);font-size:.88rem;margin-bottom:20px}
.btn-platform{display:inline-block;background:linear-gradient(135deg,var(--primary),var(--accent));color:var(--white);padding:10px 28px;border-radius:8px;font-weight:600}
.btn-platform:hover{color:var(--white);opacity:.9}
.download-steps{max-width:700px;margin:48px auto;background:var(--white);padding:36px;border-radius:var(--radius);box-shadow:var(--shadow)}
.download-steps h2{text-align:center;margin-bottom:24px}
.step-item{display:flex;gap:16px;margin-bottom:20px;align-items:flex-start}
.step-num{background:var(--primary);color:var(--white);width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0;font-size:.9rem}

/* Article page */
.article-header{padding:48px 0 32px;background:var(--white)}
.article-header h1{font-size:2rem;margin-bottom:12px;max-width:760px}
.article-meta{color:var(--text-light);font-size:.88rem}
.article-body{max-width:760px;margin:0 auto;padding:40px 20px 72px}
.article-body h2{font-size:1.4rem;margin:32px 0 14px;color:var(--text)}
.article-body h3{font-size:1.15rem;margin:24px 0 10px}
.article-body p{margin-bottom:16px;color:var(--text-light)}
.article-body ul,.article-body ol{margin:0 0 16px 24px;color:var(--text-light)}
.article-body li{margin-bottom:8px}
.article-nav{display:flex;justify-content:space-between;margin-top:48px;padding-top:24px;border-top:1px solid #e2e8f0}
.breadcrumb{padding:16px 0;font-size:.88rem;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:64px;left:0;right:0;background:var(--white);flex-direction:column;padding:16px 20px;box-shadow:0 4px 12px rgba(0,0,0,.08)}
  .nav-links.open{display:flex}
  .menu-toggle{display:block}
  .hero h1{font-size:1.8rem}
  .hero-icon-wrap{right:50%;top:auto;bottom:12px;transform:translateX(50%);width:140px;height:140px;opacity:.85}
  .hero-deco-icon{width:72px;height:72px}
  .hero-orb-1{width:200px;height:200px;right:50%;transform:translateX(50%)}
  .hero-orb-2,.hero-orb-3{display:none}
  .btn-outline{display:block;margin:12px auto 0;max-width:200px}
  .hero{padding:56px 0 64px}
}