*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#4f46e5;
  --primary-dark:#3730a3;
  --accent:#06b6d4;
  --bg:#0f172a;
  --bg-card:#1e293b;
  --text:#f1f5f9;
  --text-muted:#94a3b8;
  --gradient:linear-gradient(135deg,#4f46e5 0%,#06b6d4 100%);
  --radius:12px;
  --shadow:0 4px 24px rgba(0,0,0,.3);
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:#22d3ee}
img{max-width:100%;height:auto}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(15,23,42,.95);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.logo{font-size:1.5rem;font-weight:700;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{color:var(--text-muted);font-size:.95rem}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.btn{display:inline-block;padding:12px 28px;border-radius:50px;font-weight:600;font-size:.95rem;transition:transform .2s,box-shadow .2s;cursor:pointer;border:none}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 4px 16px rgba(79,70,229,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(79,70,229,.5);color:#fff}
.btn-outline{border:2px solid var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:var(--primary);color:#fff}
.mobile-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%;width:200%;height:200%;background:radial-gradient(circle at 30% 50%,rgba(79,70,229,.15) 0%,transparent 50%),radial-gradient(circle at 70% 50%,rgba(6,182,212,.1) 0%,transparent 50%);pointer-events:none}
.hero-badge{display:inline-block;padding:6px 18px;border-radius:50px;background:rgba(79,70,229,.2);color:var(--accent);font-size:.85rem;margin-bottom:20px;border:1px solid rgba(79,70,229,.3)}
.hero h1{font-size:2.8rem;font-weight:800;line-height:1.2;margin-bottom:20px;background:var(--gradient);-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}

/* Sections */
section{padding:70px 0}
.section-header{text-align:center;margin-bottom:50px}
.section-header h2{font-size:2rem;font-weight:700;margin-bottom:12px}
.section-header p{color:var(--text-muted);font-size:1.05rem}

/* Features Grid */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--bg-card);border-radius:var(--radius);padding:32px 24px;border:1px solid rgba(255,255,255,.06);transition:transform .3s,border-color .3s}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(79,70,229,.3)}
.feature-icon{font-size:2.2rem;margin-bottom:16px}
.feature-card h3{font-size:1.15rem;margin-bottom:10px}
.feature-card p{color:var(--text-muted);font-size:.92rem}

/* Stats */
.stats-bar{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;background:var(--bg-card);border-radius:var(--radius);padding:40px 30px;border:1px solid rgba(255,255,255,.06)}
.stat-item{text-align:center}
.stat-num{font-size:2rem;font-weight:800;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-label{color:var(--text-muted);font-size:.85rem;margin-top:4px}

/* Scenarios */
.scenarios-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scenario-item{background:var(--bg-card);border-radius:var(--radius);padding:28px 20px;text-align:center;border:1px solid rgba(255,255,255,.06)}
.scenario-item .icon{font-size:2rem;margin-bottom:12px}
.scenario-item h4{margin-bottom:8px;font-size:1rem}
.scenario-item p{color:var(--text-muted);font-size:.88rem}

/* Reviews */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:var(--bg-card);border-radius:var(--radius);padding:28px;border:1px solid rgba(255,255,255,.06)}
.review-stars{color:#fbbf24;font-size:1.1rem;margin-bottom:12px}
.review-text{color:var(--text-muted);font-size:.92rem;font-style:italic;margin-bottom:16px;line-height:1.8}
.review-author{color:var(--text);font-size:.88rem;font-weight:600}

/* Compare Table */
.compare-table{width:100%;border-collapse:collapse;background:var(--bg-card);border-radius:var(--radius);overflow:hidden}
.compare-table th,.compare-table td{padding:18px 24px;text-align:center;border-bottom:1px solid rgba(255,255,255,.06)}
.compare-table th{background:rgba(79,70,229,.15);font-weight:600}
.compare-table td:first-child{text-align:left;font-weight:500}
.compare-table .win{color:#34d399;font-weight:700}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border-radius:var(--radius);margin-bottom:12px;border:1px solid rgba(255,255,255,.06);overflow:hidden}
.faq-question{padding:20px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;user-select:none}
.faq-question::after{content:"+";font-size:1.3rem;color:var(--accent);transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 24px}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 20px}
.faq-answer p{color:var(--text-muted);font-size:.92rem}

/* CTA Banner */
.cta-banner{background:var(--gradient);border-radius:var(--radius);padding:50px 40px;text-align:center;margin-top:40px}
.cta-banner h3{font-size:1.6rem;margin-bottom:12px}
.cta-banner p{margin-bottom:24px;opacity:.9}

/* Footer */
.site-footer{background:var(--bg-card);border-top:1px solid rgba(255,255,255,.06);padding:40px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:30px}
.footer-grid h4{margin-bottom:16px;font-size:1rem}
.footer-grid p,.footer-grid li{color:var(--text-muted);font-size:.88rem}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:8px}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.06);color:var(--text-muted);font-size:.82rem}

/* Download Page */
.download-hero{text-align:center;padding:60px 0 40px}
.download-hero h1{font-size:2.4rem;margin-bottom:16px}
.download-hero p{color:var(--text-muted);max-width:600px;margin:0 auto 32px}
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;max-width:900px;margin:0 auto}
.platform-card{background:var(--bg-card);border-radius:var(--radius);padding:36px 24px;text-align:center;border:1px solid rgba(255,255,255,.06);transition:transform .3s}
.platform-card:hover{transform:translateY(-4px)}
.platform-card .platform-icon{font-size:3rem;margin-bottom:16px}
.platform-card h3{margin-bottom:8px}
.platform-card p{color:var(--text-muted);font-size:.88rem;margin-bottom:20px}
.steps-list{max-width:700px;margin:40px auto 0;counter-reset:step}
.step-item{display:flex;gap:20px;margin-bottom:24px;align-items:flex-start}
.step-num{flex-shrink:0;width:40px;height:40px;border-radius:50%;background:var(--gradient);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem}
.step-content h4{margin-bottom:6px}
.step-content p{color:var(--text-muted);font-size:.9rem}

/* Article Pages */
.article-header{padding:60px 0 30px;text-align:center}
.article-header h1{font-size:2.2rem;margin-bottom:12px}
.article-meta{color:var(--text-muted);font-size:.88rem}
.article-body{max-width:780px;margin:0 auto;padding:20px 0 60px}
.article-body h2{font-size:1.5rem;margin:32px 0 16px;padding-bottom:8px;border-bottom:1px solid rgba(255,255,255,.08)}
.article-body h3{font-size:1.2rem;margin:24px 0 12px}
.article-body p{color:var(--text-muted);margin-bottom:16px;line-height:1.9}
.article-body ul,.article-body ol{color:var(--text-muted);margin:0 0 16px 24px}
.article-body li{margin-bottom:8px}
.article-nav{display:flex;justify-content:space-between;max-width:780px;margin:0 auto;padding:30px 0;border-top:1px solid rgba(255,255,255,.08)}
.articles-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}
.article-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;border:1px solid rgba(255,255,255,.06);transition:transform .3s}
.article-card:hover{transform:translateY(-4px)}
.article-card-body{padding:24px}
.article-card h3{margin-bottom:10px;font-size:1.1rem}
.article-card p{color:var(--text-muted);font-size:.9rem;margin-bottom:16px}
.article-card .date{color:var(--text-muted);font-size:.8rem}

/* Responsive */
@media(max-width:992px){
  .features-grid,.scenarios-grid,.reviews-grid{grid-template-columns:repeat(2,1fr)}
  .stats-bar{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg-card);flex-direction:column;padding:20px;gap:16px;border-bottom:1px solid rgba(255,255,255,.08)}
  .nav-links.open{display:flex}
  .mobile-toggle{display:block}
  .hero h1{font-size:2rem}
  .features-grid,.scenarios-grid,.reviews-grid,.stats-bar{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .compare-table{font-size:.85rem}
  .compare-table th,.compare-table td{padding:12px 10px}
}