:root{--bg:#0a0a0a;--surface:#141414;--surface2:#1f1f1f;--border:#2a2a2a;--silver:#d4d4d4;--silver-dark:#737373;--silver-glow:rgba(212,212,212,.08);--accent:#fafafa;--text:#fafafa;--muted:#737373;--radius:4px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 32px}
nav{position:sticky;top:0;z-index:100;background:rgba(10,10,10,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:12px;font-size:1.15rem;font-weight:700;letter-spacing:.02em}
.logo em{color:var(--silver);font-style:normal;font-weight:300}
.logo-icon{width:32px;height:32px;background:#fff;border-radius:2px;display:flex;align-items:center;justify-content:center;font-size:1rem;color:#000}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:8px 16px;border-radius:2px;font-size:0.88rem;color:var(--muted);transition:.2s;letter-spacing:.02em}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--surface)}
.btn{padding:11px 26px;border-radius:2px;font-size:0.88rem;font-weight:600;cursor:pointer;border:none;transition:.2s;display:inline-flex;align-items:center;gap:6px;letter-spacing:.02em}
.btn-primary{background:#fff;color:#000}
.btn-primary:hover{background:var(--silver)}
.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-outline:hover{border-color:var(--silver)}
.nav-cta{padding:8px 18px;font-size:0.84rem}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.menu-toggle span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
/* Hero - luxurious minimal silver black */
.hero{padding:120px 0 100px;text-align:center;position:relative}
.hero::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:600px;height:600px;background:radial-gradient(circle,rgba(255,255,255,.05),transparent 70%);pointer-events:none}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:2px;padding:6px 14px;font-size:0.78rem;color:var(--silver);margin-bottom:24px;letter-spacing:.08em;text-transform:uppercase;position:relative;z-index:1}
.hero h1{font-size:3.4rem;font-weight:700;line-height:1.1;margin-bottom:20px;max-width:780px;margin-left:auto;margin-right:auto;letter-spacing:-.02em;position:relative;z-index:1}
.hero h1 em{font-style:normal;font-weight:300;color:var(--silver)}
.hero-sub{color:var(--muted);font-size:1.1rem;line-height:1.7;margin-bottom:36px;max-width:560px;margin-left:auto;margin-right:auto;position:relative;z-index:1}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-bottom:60px;position:relative;z-index:1}
.pro-stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);position:relative;z-index:1}
.pro-stat{padding:28px 16px;text-align:center;border-right:1px solid var(--border)}
.pro-stat:last-child{border-right:none}
.pro-stat strong{display:block;font-size:2.2rem;font-weight:300;letter-spacing:-.02em;color:#fff;margin-bottom:4px}
.pro-stat span{font-size:0.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.section{padding:100px 0}
.section-head{text-align:center;margin-bottom:60px}
.section-head h2{font-size:2.2rem;font-weight:700;margin-bottom:12px;letter-spacing:-.02em}
.section-head p{color:var(--muted);max-width:540px;margin:0 auto;font-size:0.98rem}
.label{display:inline-block;color:var(--silver);font-size:0.78rem;font-weight:600;margin-bottom:14px;text-transform:uppercase;letter-spacing:.1em}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border)}
.feat-card{background:var(--bg);padding:36px 28px;transition:.2s}
.feat-card:hover{background:var(--surface)}
.feat-icon{width:40px;height:40px;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:1.2rem;margin-bottom:18px;background:var(--surface)}
.feat-card h4{font-size:1.05rem;margin-bottom:10px;font-weight:600}
.feat-card p{color:var(--muted);font-size:0.9rem;line-height:1.7}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.price-card{background:var(--surface);border:1px solid var(--border);padding:36px 28px;position:relative;transition:.2s}
.price-card:hover{border-color:var(--silver-dark)}
.price-card.hot{background:#fff;color:#000}
.price-card.hot .price-amount{color:#000}
.price-card.hot .price-name,.price-card.hot .price-period{color:rgba(0,0,0,.6)}
.price-card.hot .price-list li{color:rgba(0,0,0,.7)}
.price-card.hot .price-list li::before{color:#000}
.price-hot-tag{position:absolute;top:-12px;left:24px;background:#000;color:#fff;font-size:0.7rem;font-weight:700;padding:4px 12px;letter-spacing:.06em;text-transform:uppercase}
.price-name{font-size:0.85rem;font-weight:600;margin-bottom:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.price-amount{font-size:3rem;font-weight:300;color:#fff;margin:10px 0 4px;letter-spacing:-.02em}
.price-amount span{font-size:1rem;font-weight:400;color:var(--muted);margin-left:4px}
.price-period{font-size:0.82rem;color:var(--muted);margin-bottom:24px}
.price-list{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}
.price-list li{font-size:0.9rem;color:var(--muted);padding-left:20px;position:relative}
.price-list li::before{content:"—";position:absolute;left:0;color:var(--silver)}
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{width:100%;padding:22px 0;display:flex;justify-content:space-between;align-items:center;background:none;border:none;color:var(--text);font-size:1rem;font-weight:500;cursor:pointer;text-align:left}
.faq-q::after{content:"+";font-size:1.4rem;color:var(--muted);transition:.2s;flex-shrink:0;font-weight:300}
.faq-item.open .faq-q::after{transform:rotate(45deg);color:var(--silver)}
.faq-a{max-height:0;overflow:hidden;transition:.3s}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 0 22px;color:var(--muted);font-size:0.92rem;line-height:1.8;max-width:640px}
footer{background:var(--bg);border-top:1px solid var(--border);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand p{color:var(--muted);font-size:0.88rem;line-height:1.7;max-width:280px;margin-top:14px}
.footer-col h4{font-size:0.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--silver);margin-bottom:18px;font-weight:600}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--muted);font-size:0.88rem;transition:.2s}
.footer-col a:hover{color:var(--text)}
.footer-bottom{border-top:1px solid var(--border);padding-top:24px;text-align:center}
.footer-bottom p{color:var(--muted);font-size:0.82rem;letter-spacing:.02em}
.page-hero{padding:80px 0 60px;border-bottom:1px solid var(--border)}
.page-hero h1{font-size:2.4rem;font-weight:700;margin-bottom:10px;letter-spacing:-.02em}
.page-hero p{color:var(--muted)}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:0.82rem;color:var(--muted);margin-bottom:16px;text-transform:uppercase;letter-spacing:.06em}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--text)}
.breadcrumb span{color:var(--border)}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);margin-bottom:60px}
.dl-card{background:var(--bg);padding:40px 28px;text-align:center}
.dl-icon{font-size:2.4rem;margin-bottom:14px}
.dl-card h3{font-size:1.1rem;margin-bottom:8px;font-weight:600}
.dl-card p{color:var(--muted);font-size:0.85rem;margin-bottom:22px}
.dl-mobile{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);max-width:680px;margin:0 auto}
.sub-box{background:var(--surface);border:1px solid var(--border);padding:32px;margin-top:60px}
.sub-code{background:#000;border:1px solid var(--border);padding:14px 18px;font-family:monospace;font-size:0.88rem;color:var(--silver);word-break:break-all;margin-bottom:18px}
.sub-steps{counter-reset:step;display:flex;flex-direction:column;gap:10px}
.sub-steps li{font-size:0.9rem;color:var(--muted);padding-left:24px;position:relative}
.sub-steps li::before{content:counter(step,decimal-leading-zero);counter-increment:step;position:absolute;left:0;color:var(--silver);font-weight:600;font-size:0.78rem;font-family:monospace}
.tut-content{max-width:820px}
.tut-sec{margin-bottom:56px}
.tut-sec h2{font-size:1.5rem;font-weight:700;margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--border);letter-spacing:-.01em}
.tut-sec h3{font-size:1.05rem;font-weight:600;margin:22px 0 12px}
.tut-sec p{color:var(--muted);line-height:1.8;margin-bottom:12px}
.tut-sec ol,.tut-sec ul{color:var(--muted);padding-left:24px;line-height:2;margin-bottom:12px}
.tip-box{background:var(--surface);border-left:2px solid var(--silver);padding:16px 20px;font-size:0.9rem;line-height:1.7;margin-top:16px}
@media(max-width:900px){
  .pro-stat-row{grid-template-columns:1fr 1fr}
  .pro-stat:nth-child(2){border-right:none}
  .pro-stat:nth-child(1),.pro-stat:nth-child(2){border-bottom:1px solid var(--border)}
  .feat-grid{grid-template-columns:1fr 1fr}
  .price-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .dl-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .hero{padding:80px 0 60px}
  .hero h1{font-size:2.4rem}
  .pro-stat-row{grid-template-columns:1fr}
  .pro-stat{border-right:none;border-bottom:1px solid var(--border)}
  .pro-stat:last-child{border-bottom:none}
  .feat-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);flex-direction:column;padding:16px;gap:4px}
  .nav-links.open{display:flex}
  .menu-toggle{display:flex}
}