/* ===== CSS Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg-primary:#0a0e27;
  --bg-secondary:#111638;
  --bg-card:#1a1f4e;
  --text-primary:#e8eaf6;
  --text-secondary:#9fa8da;
  --accent:#5c6bc0;
  --accent-light:#7986cb;
  --accent-glow:rgba(92,107,192,0.3);
  --shadow:0 4px 24px rgba(0,0,0,0.4);
  --radius:16px;
  --max-width:1200px;
  --nav-height:64px;
  --font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-family);
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.6;
  overflow-x:hidden;
  min-height:100vh;
}
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
a{color:var(--accent-light);text-decoration:none;transition:color 0.2s}
a:hover{color:#fff}
h1,h2,h3,h4{font-weight:600;letter-spacing:-0.01em}
h2{
  font-size:2rem;
  margin-bottom:1.5rem;
  text-align:center;
  background:linear-gradient(135deg,#e8eaf6,#9fa8da);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
img{max-width:100%;height:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ===== Buttons ===== */
.btn{
  display:inline-block;
  padding:12px 32px;
  border-radius:40px;
  font-weight:600;
  font-size:1rem;
  cursor:pointer;
  border:none;
  transition:all 0.3s;
  text-align:center;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),#3949ab);
  color:#fff;
  box-shadow:0 4px 20px var(--accent-glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px var(--accent-glow)}
.btn-outline{
  background:transparent;
  border:2px solid var(--accent);
  color:var(--accent-light);
}
.btn-outline:hover{background:var(--accent);color:#fff}

/* ===== Cards & Grid ===== */
.card{
  background:var(--bg-card);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow);
  transition:transform 0.3s,box-shadow 0.3s;
}
.card:hover{transform:translateY(-4px);box-shadow:0 8px 40px rgba(0,0,0,0.5)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}
.grid-4{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:24px}
.section{padding:80px 0}
.badge{
  display:inline-block;
  padding:4px 12px;
  border-radius:20px;
  font-size:0.75rem;
  font-weight:600;
  background:var(--accent);
  color:#fff;
  margin-bottom:8px;
}
.text-center{text-align:center}
.mt-2{margin-top:2rem}
.mb-2{margin-bottom:2rem}

/* ===== Header ===== */
.header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:1000;
  background:rgba(10,14,39,0.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(92,107,192,0.2);
  height:var(--nav-height);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:100%;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:1.4rem;
  font-weight:700;
}
.logo-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  background:linear-gradient(135deg,var(--accent),#3949ab);
  border-radius:10px;
  font-size:1.2rem;
  color:#fff;
}
.nav-list{
  display:flex;
  list-style:none;
  gap:32px;
}
.nav-list a{
  color:var(--text-secondary);
  font-weight:500;
  padding:8px 0;
  border-bottom:2px solid transparent;
  transition:color 0.2s,border-color 0.2s;
}
.nav-list a:hover{color:#fff;border-bottom-color:var(--accent)}
.menu-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  background:transparent;
  border:none;
  cursor:pointer;
  padding:4px;
}
.menu-toggle .bar{
  width:28px;
  height:3px;
  background:var(--text-primary);
  border-radius:2px;
  transition:0.3s;
}

/* ===== Hero ===== */
.hero{
  padding:120px 0 80px;
  position:relative;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  top:-50%;
  right:-20%;
  width:600px;
  height:600px;
  background:radial-gradient(circle,rgba(92,107,192,0.15),transparent 70%);
  pointer-events:none;
}
.hero-content{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
}
.hero h1{
  font-size:3rem;
  line-height:1.2;
  margin-bottom:16px;
  background:linear-gradient(135deg,#fff,#9fa8da);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-subtitle{
  font-size:1.3rem;
  color:var(--accent-light);
  margin-bottom:16px;
}
.hero-desc{
  color:var(--text-secondary);
  font-size:1.05rem;
  margin-bottom:32px;
  max-width:520px;
}
.hero-actions{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}
.hero-visual{
  display:flex;
  justify-content:center;
  position:relative;
}
.hero-card{
  background:var(--bg-card);
  border-radius:var(--radius);
  padding:24px;
  width:280px;
  box-shadow:0 8px 40px rgba(0,0,0,0.6);
  border:1px solid rgba(92,107,192,0.3);
  position:relative;
  backdrop-filter:blur(4px);
  -webkit-backdrop-filter:blur(4px);
}
.hero-card-glow{
  position:absolute;
  width:100%;
  height:100%;
  background:radial-gradient(circle,var(--accent-glow),transparent 70%);
  top:-10px;
  left:-10px;
  width:calc(100% + 20px);
  height:calc(100% + 20px);
  z-index:-1;
  border-radius:24px;
}
.hc-header{
  display:flex;
  align-items:center;
  gap:8px;
  color:#f44336;
  font-weight:600;
  font-size:0.9rem;
  margin-bottom:16px;
}
.live-dot{
  width:10px;
  height:10px;
  background:#f44336;
  border-radius:50%;
  display:inline-block;
  animation:pulse 1.5s infinite;
}
@keyframes pulse{0%{opacity:1}50%{opacity:0.4}100%{opacity:1}}
.hc-match{font-size:1.2rem;font-weight:600;margin-bottom:8px}
.hc-score{font-size:2.5rem;font-weight:700;color:#fff}
.hc-status{color:var(--text-secondary);font-size:0.9rem}

/* ===== Advantages ===== */
.advantage-icon{font-size:2.5rem;margin-bottom:12px}

/* ===== HowTo ===== */
.howto-card{padding:32px}
.howto-list{list-style:none;counter-reset:step}
.howto-list li{
  display:flex;
  gap:16px;
  align-items:flex-start;
  margin-bottom:20px;
  padding-bottom:20px;
  border-bottom:1px solid rgba(92,107,192,0.15);
}
.howto-list li:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.step{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  border-radius:50%;
  background:var(--accent);
  color:#fff;
  font-weight:700;
  flex-shrink:0;
}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{
  background:var(--bg-card);
  border-radius:12px;
  margin-bottom:12px;
  padding:16px 20px;
  cursor:pointer;
  border:1px solid transparent;
  transition:border-color 0.2s;
}
.faq-item[open]{border-color:var(--accent)}
.faq-item summary{
  font-weight:600;
  font-size:1.05rem;
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';
  font-size:1.5rem;
  color:var(--accent-light);
  transition:transform 0.3s;
}
.faq-item[open] summary::after{content:'−'}
.faq-item p{margin-top:12px;color:var(--text-secondary);line-height:1.7}

/* ===== Contact Form ===== */
.contact-form label{display:block;margin-bottom:6px;font-weight:500;color:var(--text-secondary)}
.contact-form input,.contact-form textarea{
  width:100%;
  padding:12px 16px;
  border-radius:10px;
  border:1px solid rgba(92,107,192,0.3);
  background:var(--bg-primary);
  color:var(--text-primary);
  font-size:1rem;
  margin-bottom:16px;
  transition:border-color 0.2s;
}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--accent)}
.contact-form button{width:100%}

/* ===== Footer ===== */
.footer{
  background:var(--bg-secondary);
  padding:48px 0 24px;
  border-top:1px solid rgba(92,107,192,0.15);
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:32px;
  margin-bottom:32px;
}
.footer-col h4{margin-bottom:16px;color:#fff}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:8px}
.footer-col ul a{color:var(--text-secondary)}
.footer-col ul a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(92,107,192,0.15);
  padding-top:24px;
  text-align:center;
  color:var(--text-secondary);
  font-size:0.9rem;
}

/* ===== Back to Top ===== */
.back-to-top{
  position:fixed;
  bottom:40px;
  right:40px;
  width:48px;
  height:48px;
  border-radius:50%;
  background:var(--accent);
  color:#fff;
  border:none;
  font-size:1.5rem;
  cursor:pointer;
  box-shadow:0 4px 20px var(--accent-glow);
  opacity:0;
  visibility:hidden;
  transform:translateY(20px);
  transition:opacity 0.3s,visibility 0.3s,transform 0.3s;
  z-index:999;
}
.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--accent-light)}

/* ===== Article meta ===== */
.article-meta{color:var(--text-secondary);font-size:0.85rem;margin:12px 0}
.read-more{font-weight:600;color:var(--accent-light)}

/* ===== Focus ===== */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ===== Scroll Animation (fade-in-up) ===== */
.section,.card,.hero-content,.footer-grid,.faq-item,.howto-card{
  animation:fadeInUp 0.7s ease both;
}
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(30px)}
  to{opacity:1;transform:translateY(0)}
}
.section:nth-child(2){animation-delay:0.1s}
.section:nth-child(3){animation-delay:0.2s}
.section:nth-child(4){animation-delay:0.3s}
.section:nth-child(5){animation-delay:0.4s}
.section:nth-child(6){animation-delay:0.5s}
.section:nth-child(7){animation-delay:0.6s}

/* ===== Responsive ===== */
@media(max-width:768px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .section{padding:48px 0}
  h2{font-size:1.6rem}
  .nav{
    display:none;
    position:fixed;
    top:var(--nav-height);
    left:0;
    right:0;
    background:var(--bg-secondary);
    padding:24px;
    border-bottom:1px solid var(--accent);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
  }
  .nav.nav-open{display:block}
  .nav-list{flex-direction:column;gap:16px}
  .menu-toggle{display:flex}
  .hero-content{grid-template-columns:1fr;text-align:center}
  .hero-desc{max-width:100%}
  .hero-actions{justify-content:center}
  .hero h1{font-size:2.2rem}
  .footer-grid{grid-template-columns:1fr 1fr}
  .back-to-top{bottom:20px;right:20px;width:40px;height:40px;font-size:1.2rem}
}
@media(max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:1.8rem}
  .hero-subtitle{font-size:1rem}
  .btn{padding:10px 24px;font-size:0.9rem}
  .hero-card{width:100%;max-width:280px}
}