*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0d0b16;--bg2:#16122a;--bg3:#1e1835;
  --text:#e8e6f0;--muted:#9b96b0;
  --accent:#ff2d55;--accent2:#7b61ff;--gold:#f5c842;
  --radius:12px;--shadow:0 8px 32px rgba(0,0,0,.45);
  --max:1180px;--header-h:57px;
}
html{scroll-behavior:smooth;font-size:16px}
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:1.75;min-height:100vh}
a{color:var(--accent2);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius)}
.container{width:min(100% - 2rem,var(--max));margin:0 auto}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(13,11,22,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(123,97,255,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.85rem 0;gap:1rem}
.logo{display:flex;align-items:center;gap:.65rem;color:var(--text);font-weight:700;font-size:1.15rem}
.logo img{width:40px;height:40px;border-radius:10px}
.nav-desktop{display:flex;gap:1.5rem;list-style:none}
.nav-desktop a{color:var(--muted);font-size:.95rem}
.nav-desktop a:hover,.nav-desktop a.active{color:var(--text)}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:.25rem}
.nav-mobile{display:none;flex-direction:column;background:var(--bg2);border-top:1px solid rgba(123,97,255,.12);padding:1rem 0}
.nav-mobile.open{display:flex;position:absolute;top:100%;left:0;right:0;width:100%;z-index:101;box-shadow:0 8px 24px rgba(0,0,0,.4)}
.nav-mobile a{padding:.65rem 1rem;color:var(--muted);border-left:3px solid transparent}
.nav-mobile a:hover,.nav-mobile a.active{color:var(--text);border-left-color:var(--accent);background:rgba(123,97,255,.08)}

/* Ads bar */
.ads-bar{position:sticky;top:var(--header-h);z-index:99;background:rgba(13,11,22,.96);backdrop-filter:blur(10px);border-bottom:1px solid rgba(123,97,255,.12);padding:8px 0}
#ads{display:flex;justify-content:center;align-items:flex-start;flex-wrap:wrap;background:transparent;margin:0 auto;gap:6px;max-width:var(--max);padding:0 1rem}
#ads>div{display:flex;flex-direction:column;align-items:center;width:70px;box-sizing:border-box}
#ads img{width:65px;height:65px;object-fit:cover;border-radius:18px;box-shadow:0 6px 18px rgba(24,24,24,.35);transition:transform 180ms ease,box-shadow 180ms ease;display:block;border:none;background:linear-gradient(135deg,#fff,#fff)}
#ads a{display:inline-block;text-decoration:none;border-radius:15px}
#ads img:hover{transform:translateY(-4px) scale(1.04);box-shadow:0 10px 24px rgba(255,45,85,.25)}
#ads figcaption,#ads .caption{height:15px;font-size:11px;color:var(--muted);text-align:center;max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:4px}

/* Hero */
.hero{padding:3rem 0 2.5rem;background:linear-gradient(180deg,rgba(123,97,255,.12) 0%,transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;align-items:center}
.hero h1{font-size:clamp(1.6rem,4vw,2.35rem);line-height:1.35;margin-bottom:1rem;background:linear-gradient(135deg,#fff 0%,#c4b5fd 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{color:var(--muted);margin-bottom:1.5rem;font-size:1.05rem}
.hero-btns{display:flex;flex-wrap:wrap;gap:.75rem}
.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.75rem 1.5rem;border-radius:50px;font-weight:600;font-size:.95rem;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn-primary{background:linear-gradient(135deg,var(--accent),#ff6b35);color:#fff;box-shadow:0 4px 20px rgba(255,45,85,.35)}
.btn-secondary{background:var(--bg3);color:var(--text);border:1px solid rgba(123,97,255,.3)}
.btn:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(255,45,85,.45)}
.hero-img{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid rgba(123,97,255,.2)}

/* Sections */
section{padding:3rem 0}
.section-title{font-size:1.55rem;margin-bottom:.5rem;position:relative;padding-left:1rem}
.section-title::before{content:"";position:absolute;left:0;top:.25em;bottom:.25em;width:4px;background:linear-gradient(180deg,var(--accent),var(--accent2));border-radius:2px}
.section-sub{color:var(--muted);margin-bottom:2rem;padding-left:1rem;font-size:.95rem}

/* Cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}
.card{background:var(--bg2);border-radius:var(--radius);overflow:hidden;border:1px solid rgba(123,97,255,.12);transition:transform .25s,border-color .25s}
.card:hover{transform:translateY(-4px);border-color:rgba(123,97,255,.35)}
.card-body{padding:1.25rem}
.card h3{font-size:1.05rem;margin-bottom:.5rem;color:var(--text)}
.card p{color:var(--muted);font-size:.9rem;line-height:1.65}
.card-img{aspect-ratio:16/10;object-fit:cover;width:100%;border-radius:0}

/* Feature list */
.feature-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem;margin:1.5rem 0}
.feature-item{background:var(--bg2);padding:1.15rem 1.25rem;border-radius:var(--radius);border-left:3px solid var(--accent2)}
.feature-item h4{font-size:.95rem;margin-bottom:.35rem;color:var(--gold)}
.feature-item p{font-size:.85rem;color:var(--muted)}

/* Content prose */
.prose{max-width:820px}
.prose h2{font-size:1.35rem;margin:2rem 0 1rem;color:var(--text)}
.prose h3{font-size:1.1rem;margin:1.5rem 0 .75rem;color:var(--gold)}
.prose p{margin-bottom:1rem;color:var(--muted)}
.prose ul,.prose ol{margin:0 0 1rem 1.5rem;color:var(--muted)}
.prose li{margin-bottom:.4rem}
.prose strong{color:var(--text)}

/* Two column layout */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:start;margin:2rem 0}
.img-caption{text-align:center;color:var(--muted);font-size:.82rem;margin-top:.5rem}

/* Steps */
.steps{counter-reset:step;display:grid;gap:1.25rem;margin:1.5rem 0}
.step{background:var(--bg2);padding:1.25rem 1.25rem 1.25rem 3.5rem;border-radius:var(--radius);position:relative;counter-increment:step}
.step::before{content:counter(step);position:absolute;left:1rem;top:1.25rem;width:28px;height:28px;background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;color:#fff;line-height:28px;text-align:center}

/* FAQ */
.faq-item{background:var(--bg2);border-radius:var(--radius);margin-bottom:.75rem;border:1px solid rgba(123,97,255,.1);overflow:hidden}
.faq-q{padding:1rem 1.25rem;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-a{padding:0 1.25rem 1rem;color:var(--muted);font-size:.92rem;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-q{color:var(--accent2)}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid rgba(123,97,255,.12);padding:2.5rem 0 1.5rem;margin-top:2rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem;margin-bottom:2rem}
.footer-brand p{color:var(--muted);font-size:.88rem;margin-top:.75rem;max-width:360px}
.footer-col h4{font-size:.9rem;margin-bottom:.75rem;color:var(--text)}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:.45rem}
.footer-col a{color:var(--muted);font-size:.88rem}
.footer-col a:hover{color:var(--accent2)}
.footer-bottom{text-align:center;padding-top:1.5rem;border-top:1px solid rgba(123,97,255,.08);color:var(--muted);font-size:.82rem}

/* Error pages */
.error-page{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:2rem}
.error-code{font-size:6rem;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.error-page h1{font-size:1.5rem;margin:1rem 0 .5rem}
.error-page p{color:var(--muted);margin-bottom:1.5rem}

/* Page header for sub pages */
.page-header{padding:2.5rem 0 1.5rem;background:linear-gradient(180deg,rgba(123,97,255,.08),transparent)}
.page-header h1{font-size:1.75rem;margin-bottom:.5rem}
.page-header p{color:var(--muted);font-size:.95rem}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:.75rem}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent2)}

/* Responsive */
@media(max-width:900px){
  .hero-grid,.two-col,.footer-grid{grid-template-columns:1fr}
  .nav-desktop{display:none}
  .menu-toggle{display:block}
  .hero{padding:2rem 0 1.5rem}
  .hero-img{order:-1}
  section{padding:2rem 0}
  :root{--header-h:52px}
}
@media(max-width:480px){
  .card-grid{grid-template-columns:1fr}
  .feature-list{grid-template-columns:1fr}
  .hero-btns{flex-direction:column}
  .btn{justify-content:center}
}