*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#4a6cf7;
  --primary-dark:#3b5bdb;
  --primary-light:#6c8eff;
  --accent:#5b8def;
  --bg:#f5f7fa;
  --bg-grad:linear-gradient(135deg,#f5f7fa 0%,#e4edf9 100%);
  --text:#333333;
  --text-light:#666666;
  --white:#ffffff;
  --border:#e8eef8;
  --shadow:0 10px 30px rgba(0,0,0,.05);
  --radius:15px;
  --transition:.3s ease;
}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Tahoma,Geneva,Verdana,sans-serif;
  color:var(--text);
  background:var(--bg-grad);
  line-height:1.6;
  font-size:16px;
  min-height:100vh;
}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-light)}
img{max-width:100%;height:auto}
.container{max-width:1140px;margin:0 auto;padding:0 5%}

/* Header */
.site-header{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(10px);
  position:fixed;
  width:100%;
  top:0;
  z-index:1000;
  box-shadow:0 2px 15px rgba(0,0,0,.05);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:700;color:var(--text)}
.logo img{height:40px;width:40px}
.logo-icon{
  width:40px;height:40px;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  border-radius:10px;display:flex;align-items:center;justify-content:center;
  color:var(--white);font-weight:800;font-size:1.15rem;
}
.nav-links{display:flex;align-items:center;gap:2rem;list-style:none}
.nav-links a{color:var(--primary);font-weight:500;font-size:.95rem}
.nav-links a:hover,.nav-links a.active{color:var(--primary-light)}
.btn-download{
  display:inline-flex;align-items:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  color:var(--white)!important;padding:10px 24px;border-radius:50px;
  font-weight:600;font-size:.9rem;
  transition:transform var(--transition),box-shadow var(--transition);
  border:none;cursor:pointer;
}
.btn-download:hover{transform:translateY(-3px);box-shadow:0 10px 25px rgba(74,108,247,.3);color:var(--white)!important}
.mobile-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text)}

/* Hero */
.hero{
  min-height:100vh;
  display:flex;align-items:center;
  padding:120px 0 60px;
  position:relative;overflow:hidden;
}
.hero-inner{display:flex;align-items:center;gap:48px;width:100%}
.hero-content{flex:1;max-width:600px}
.hero-visual{
  flex:1;display:flex;justify-content:center;align-items:center;
  animation:float 6s ease-in-out infinite;
}
.hero-badge{
  width:280px;height:280px;border-radius:40px;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 20px 60px rgba(74,108,247,.35);
  color:#fff;font-size:6rem;font-weight:800;
}
.hero h1{
  font-size:3.2rem;margin-bottom:1rem;line-height:1.2;font-weight:800;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.hero p{font-size:1.15rem;margin-bottom:2rem;color:var(--text-light);line-height:1.8}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{
  display:inline-block;padding:15px 30px;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  color:var(--white)!important;text-decoration:none;border-radius:50px;
  font-weight:600;font-size:1.05rem;border:none;cursor:pointer;
  transition:transform var(--transition),box-shadow var(--transition);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 10px 25px rgba(74,108,247,.3)}
.btn-outline{
  display:inline-block;padding:13px 28px;border-radius:50px;font-weight:600;
  border:2px solid var(--primary);color:var(--primary)!important;background:transparent;
  transition:all var(--transition);
}
.btn-outline:hover{background:rgba(74,108,247,.08)}

@keyframes float{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-18px)}
}

/* Sections */
.section{padding:90px 0}
.section-title{text-align:center;margin-bottom:3rem}
.section-title h2{font-size:2.3rem;color:var(--primary);margin-bottom:1rem;font-weight:700}
.section-title p{color:var(--text-light);max-width:600px;margin:0 auto}

.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px;margin-top:40px}
.feature-card{
  background:var(--white);border-radius:var(--radius);padding:30px;
  box-shadow:var(--shadow);transition:transform var(--transition),box-shadow var(--transition);
}
.feature-card:hover{transform:translateY(-10px);box-shadow:0 15px 40px rgba(74,108,247,.15)}
.feature-icon{
  width:52px;height:52px;border-radius:12px;margin-bottom:16px;
  background:linear-gradient(135deg,rgba(74,108,247,.12),rgba(108,142,255,.12));
  display:flex;align-items:center;justify-content:center;font-size:1.4rem;
}
.feature-card h3{color:var(--primary);margin-bottom:1rem;font-size:1.35rem}
.feature-card p{color:var(--text-light);font-size:.95rem;line-height:1.7}

/* Platforms */
.platforms-wrap{
  background:var(--white);border-radius:var(--radius);padding:50px;
  text-align:center;box-shadow:var(--shadow);
}
.platform-logos{display:flex;justify-content:center;gap:28px;margin-top:30px;flex-wrap:wrap}
.platform-logo{
  width:100px;height:100px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  border-radius:15px;background:#f0f4ff;transition:transform var(--transition);gap:6px;
  font-weight:600;color:var(--primary);font-size:.9rem;
}
.platform-logo:hover{transform:scale(1.08)}
.platform-logo span.icon{font-size:1.8rem}

/* Testimonials */
.testimonials{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);color:#fff;padding:90px 0;border-radius:0}
.testimonials .section-title h2{color:#fff}
.testimonials .section-title p{color:rgba(255,255,255,.85)}
.testimonial-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px;margin-top:40px}
.testimonial-card{
  background:rgba(255,255,255,.12);backdrop-filter:blur(10px);
  border-radius:var(--radius);padding:30px;border:1px solid rgba(255,255,255,.2);
}
.testimonial-card p{margin-bottom:16px;line-height:1.75;opacity:.95}
.testimonial-card strong{opacity:.9}

/* Daily update */
.daily-block{
  background:var(--white);border-radius:var(--radius);padding:28px 32px;
  box-shadow:var(--shadow);border-left:4px solid var(--primary);margin-bottom:36px;
}
.daily-block h3{color:var(--primary);font-size:1.2rem;margin-bottom:8px}
.daily-block .update-date{color:var(--primary);font-size:.85rem;margin-bottom:12px;font-weight:600}
.daily-block p{color:var(--text-light);font-size:.95rem;line-height:1.75}
.daily-tip{text-align:center;color:var(--text-light);font-size:.9rem;margin-bottom:8px}

/* Articles */
.articles-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:28px}
.article-card{
  background:var(--white);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);transition:transform var(--transition);
}
.article-card:hover{transform:translateY(-6px)}
.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(--text);line-height:1.4}
.article-card h3 a{color:var(--text)}
.article-card h3 a:hover{color:var(--primary)}
.article-card p{color:var(--text-light);font-size:.88rem;line-height:1.7;margin-bottom:16px}
.read-more{color:var(--primary);font-weight:600;font-size:.88rem}

/* FAQ */
.faq-wrap{
  background:var(--white);border-radius:var(--radius);padding:40px 50px;
  box-shadow:var(--shadow);
}
.faq-list{max-width:860px;margin:0 auto}
.faq-item{margin-bottom:18px;border-bottom:1px solid #eee;padding-bottom:18px}
.faq-item:last-child{border-bottom:none;margin-bottom:0}
.faq-question{
  font-weight:600;font-size:1.1rem;color:var(--primary);margin-bottom:8px;
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;
}
.faq-question::after{content:"+";font-size:1.3rem;flex-shrink:0;transition:transform var(--transition)}
.faq-item.open .faq-question::after{transform:rotate(45deg)}
.faq-answer{color:var(--text-light);font-size:.95rem;line-height:1.8;max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-answer{max-height:600px;padding-top:4px}

/* CTA */
.cta-section{
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff;padding:70px 0;text-align:center;
}
.cta-section h2{font-size:1.9rem;margin-bottom:12px}
.cta-section p{opacity:.9;margin-bottom:28px}

/* Footer */
.site-footer{background:#1a1a2e;color:#ccc;padding:50px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:36px;margin-bottom:30px}
.footer-col h4{margin-bottom:18px;color:#6c8eff;font-size:1.05rem}
.footer-col p{font-size:.88rem;line-height:1.7;color:#aaa}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{color:#ccc;font-size:.9rem;transition:color .3s}
.footer-col a:hover{color:#fff}
.footer-bottom{
  text-align:center;padding-top:20px;border-top:1px solid #333;
  color:#888;font-size:.85rem;
}

/* Download page */
.download-hero{
  padding:140px 0 60px;text-align:center;
  background:linear-gradient(135deg,rgba(74,108,247,.08),rgba(108,142,255,.12));
}
.download-hero h1{
  font-size:2.5rem;margin-bottom:12px;font-weight:800;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.download-hero p{color:var(--text-light);font-size:1.1rem}
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:24px;margin-top:40px}
.platform-card{
  background:var(--white);border-radius:var(--radius);padding:32px;text-align:center;
  box-shadow:var(--shadow);transition:transform var(--transition);
}
.platform-card:hover{transform:translateY(-6px)}
.platform-card .platform-icon{font-size:2.4rem;margin-bottom:14px}
.platform-card h3{font-size:1.15rem;margin-bottom:8px;color:var(--primary)}
.platform-card p{color:var(--text-light);font-size:.88rem;margin-bottom:20px;line-height:1.6}
.steps-list{max-width:720px;margin:40px auto 0}
.step-item{display:flex;gap:20px;margin-bottom:28px;align-items:flex-start}
.step-num{
  flex-shrink:0;width:40px;height:40px;background:var(--primary);color:#fff;
  border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;
}
.step-content h4{font-weight:600;margin-bottom:6px;color:var(--text)}
.step-content p{color:var(--text-light);font-size:.92rem;line-height:1.7}

/* Article */
.breadcrumb{padding:100px 0 0;font-size:.85rem;color:var(--text-light)}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}
.article-header{padding:28px 0 36px}
.article-header h1{font-size:2rem;font-weight:700;color:var(--text);margin-bottom:12px;line-height:1.35}
.article-meta{color:var(--text-light);font-size:.88rem;display:flex;gap:20px;flex-wrap:wrap}
.article-body{
  max-width:780px;margin:0 auto 60px;padding:40px 28px;
  background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);
}
.article-body h2{font-size:1.35rem;font-weight:600;margin:28px 0 14px;color:var(--primary)}
.article-body h3{font-size:1.1rem;font-weight:600;margin:22px 0 10px;color:var(--text)}
.article-body p{margin-bottom:16px;color:var(--text);line-height:1.85}
.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 .daily-extra{margin-top:24px;padding:16px 18px;background:#f0f4ff;border-radius:10px;color:var(--text-light);font-size:.92rem}
.article-cta{text-align:center;margin-top:36px}

/* Sitemap page */
.sitemap-list{max-width:640px;margin:0 auto}
.sitemap-list ul{list-style:none}
.sitemap-list li{margin-bottom:12px;padding:14px 18px;background:var(--white);border-radius:10px;box-shadow:var(--shadow)}
.sitemap-list a{font-weight:500}

/* Responsive */
@media(max-width:768px){
  .nav-links{
    display:none;position:absolute;top:72px;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{min-height:auto;padding:110px 0 50px}
  .hero-inner{flex-direction:column;text-align:center}
  .hero-content{max-width:100%}
  .hero h1{font-size:2.2rem}
  .hero-actions{justify-content:center}
  .hero-badge{width:200px;height:200px;font-size:4.5rem;border-radius:32px}
  .section{padding:60px 0}
  .section-title h2{font-size:1.8rem}
  .faq-wrap{padding:28px 20px}
  .platforms-wrap{padding:30px 20px}
  .article-header h1{font-size:1.5rem}
  .download-hero{padding:120px 0 40px}
  .download-hero h1{font-size:1.9rem}
}