*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#4f6ef7;
  --primary-dark:#3a56d4;
  --accent:#00c9a7;
  --bg:#0f1117;
  --bg-card:#1a1d27;
  --bg-card-hover:#22263a;
  --text:#e8eaf0;
  --text-muted:#9aa0b4;
  --border:#2a2f42;
  --radius:12px;
  --shadow:0 8px 32px rgba(0,0,0,.35);
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}
img{max-width:100%;display:block}
.container{max-width:1140px;margin:0 auto;padding:0 24px}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(15,17,23,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text)}
.logo img{width:32px;height:32px}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{color:var(--text-muted);font-size:.95rem;font-weight:500}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:8px;font-weight:600;font-size:.95rem;border:none;cursor:pointer;transition:all .2s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px)}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-lg{padding:14px 32px;font-size:1.05rem}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer}

/* Hero */
.hero{padding:80px 0 60px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-50%;left:50%;transform:translateX(-50%);width:800px;height:800px;background:radial-gradient(circle,rgba(79,110,247,.12) 0%,transparent 70%);pointer-events:none}
.hero-badge{display:inline-block;padding:6px 16px;border-radius:20px;background:rgba(79,110,247,.15);color:var(--primary);font-size:.85rem;font-weight:600;margin-bottom:20px}
.hero h1{font-size:2.8rem;font-weight:800;line-height:1.2;margin-bottom:16px;background:linear-gradient(135deg,#fff 30%,var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.15rem;color:var(--text-muted);max-width:640px;margin:0 auto 32px}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.stats{display:flex;justify-content:center;gap:48px;margin-top:56px;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-num{font-size:2rem;font-weight:800;color:var(--accent)}
.stat-label{font-size:.85rem;color:var(--text-muted);margin-top:4px}

/* 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-muted);max-width:560px;margin:0 auto}
.section-label{display:inline-block;font-size:.8rem;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:8px}

/* Feature Grid */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:all .25s}
.feature-card:hover{background:var(--bg-card-hover);border-color:var(--primary);transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-icon{font-size:2rem;margin-bottom:14px}
.feature-card h3{font-size:1.1rem;margin-bottom:8px}
.feature-card p{color:var(--text-muted);font-size:.92rem}

/* Platform Cards */
.platform-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.platform-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;text-align:center;transition:all .25s}
.platform-card:hover{border-color:var(--accent)}
.platform-icon{font-size:3rem;margin-bottom:16px}
.platform-card h3{font-size:1.2rem;margin-bottom:8px}
.platform-card p{color:var(--text-muted);font-size:.9rem;margin-bottom:20px}
.platform-version{display:inline-block;padding:4px 12px;border-radius:6px;background:rgba(0,201,167,.12);color:var(--accent);font-size:.8rem;font-weight:600;margin-bottom:16px}

/* Architecture */
.arch-flow{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;padding:40px 0}
.arch-node{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 28px;text-align:center;min-width:140px}
.arch-node .icon{font-size:1.8rem;margin-bottom:6px}
.arch-node .label{font-size:.85rem;color:var(--text-muted)}
.arch-arrow{color:var(--primary);font-size:1.5rem;font-weight:700}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.review-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.review-stars{color:#f5c542;font-size:1.1rem;margin-bottom:12px}
.review-text{color:var(--text-muted);font-size:.95rem;font-style:italic;margin-bottom:16px}
.review-author{display:flex;align-items:center;gap:12px}
.review-avatar{width:40px;height:40px;border-radius:50%;background:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff}
.review-name{font-weight:600;font-size:.9rem}
.review-role{font-size:.8rem;color:var(--text-muted)}

/* FAQ */
.faq-list{max-width:720px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq-question{width:100%;background:var(--bg-card);border:none;color:var(--text);padding:18px 24px;text-align:left;font-size:1rem;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-question:hover{background:var(--bg-card-hover)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .3s;color:var(--text-muted);font-size:.95rem}
.faq-item.open .faq-answer{padding:0 24px 18px;max-height:300px}
.faq-toggle{font-size:1.2rem;transition:transform .3s}
.faq-item.open .faq-toggle{transform:rotate(45deg)}

/* CTA */
.cta-section{text-align:center;padding:80px 0;background:linear-gradient(180deg,var(--bg) 0%,rgba(79,110,247,.08) 100%)}
.cta-section h2{font-size:2rem;margin-bottom:12px}
.cta-section p{color:var(--text-muted);margin-bottom:28px}

/* Footer */
.site-footer{border-top:1px solid var(--border);padding:40px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand p{color:var(--text-muted);font-size:.9rem;margin-top:12px}
.footer-col h4{font-size:.95rem;margin-bottom:14px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{color:var(--text-muted);font-size:.9rem}
.footer-col a:hover{color:var(--text)}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid var(--border);color:var(--text-muted);font-size:.85rem}

/* Article Pages */
.article-header{padding:60px 0 40px;text-align:center;border-bottom:1px solid var(--border)}
.article-header h1{font-size:2.2rem;margin-bottom:12px}
.article-meta{color:var(--text-muted);font-size:.9rem}
.article-body{max-width:760px;margin:0 auto;padding:48px 24px}
.article-body h2{font-size:1.5rem;margin:36px 0 14px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.article-body h3{font-size:1.2rem;margin:28px 0 10px}
.article-body p{margin-bottom:16px;color:var(--text-muted)}
.article-body ul,.article-body ol{margin:0 0 16px 24px;color:var(--text-muted)}
.article-body li{margin-bottom:6px}
.article-body code{background:var(--bg-card);padding:2px 8px;border-radius:4px;font-size:.9rem;color:var(--accent)}
.article-body pre{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;overflow-x:auto;margin-bottom:16px}
.article-body pre code{padding:0;background:none}

/* Article List */
.article-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}
.article-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all .25s}
.article-card:hover{border-color:var(--primary);transform:translateY(-3px)}
.article-card-body{padding:24px}
.article-card h3{font-size:1.15rem;margin-bottom:8px}
.article-card p{color:var(--text-muted);font-size:.9rem;margin-bottom:14px}
.article-card .date{font-size:.8rem;color:var(--text-muted)}

/* Download Page */
.download-hero{padding:60px 0;text-align:center}
.download-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:28px;margin-top:40px}
.download-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:36px;text-align:center}
.download-card .platform-icon{font-size:3.5rem;margin-bottom:16px}
.download-card h3{font-size:1.3rem;margin-bottom:8px}
.download-card .desc{color:var(--text-muted);font-size:.9rem;margin-bottom:8px}
.download-card .req{color:var(--text-muted);font-size:.82rem;margin-bottom:20px}
.download-card .file-info{display:flex;justify-content:center;gap:20px;margin-bottom:20px;font-size:.85rem;color:var(--text-muted)}
.sys-req{max-width:720px;margin:48px auto 0;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px}
.sys-req h3{margin-bottom:16px}
.sys-req table{width:100%;border-collapse:collapse}
.sys-req td,.sys-req th{padding:10px 14px;text-align:left;border-bottom:1px solid var(--border);font-size:.9rem}
.sys-req th{color:var(--text-muted);font-weight:600}

/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:.85rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--text)}

@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg);flex-direction:column;padding:16px 24px;border-bottom:1px solid var(--border)}
  .nav-links.open{display:flex}
  .menu-toggle{display:block}
  .hero h1{font-size:2rem}
  .stats{gap:28px}
  .footer-grid{grid-template-columns:1fr}
  .arch-flow{flex-direction:column}
  .arch-arrow{transform:rotate(90deg)}
}