*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0e1a;--bg2:#12182a;--bg3:#1a2238;
  --text:#e8eaf0;--muted:#9aa3b8;
  --accent:#ff2e95;--accent2:#ff8c42;--accent3:#7b5cff;
  --border:rgba(255,255,255,.08);--radius:12px;
  --max:1200px;--header-h:64px;
}
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(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent2)}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,14,26,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text)}
.logo img{width:36px;height:36px;border-radius:8px}
.nav-desktop{display:flex;gap:28px;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:4px 8px}
.nav-mobile{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--border);padding:12px 0}
.nav-mobile.open{display:block}
.nav-mobile a{display:block;padding:12px 20px;color:var(--muted);border-bottom:1px solid var(--border)}
.nav-mobile a:hover{color:var(--text);background:var(--bg3)}

/* Hero */
.hero{padding:60px 0 48px;text-align:center;background:linear-gradient(180deg,rgba(123,92,255,.12) 0%,transparent 60%)}
.hero h1{font-size:clamp(1.75rem,4vw,2.5rem);margin-bottom:16px;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero .subtitle{font-size:1.1rem;color:var(--muted);max-width:680px;margin:0 auto 28px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 28px;border-radius:50px;font-weight:600;font-size:.95rem;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent3));color:#fff;box-shadow:0 4px 20px rgba(255,46,149,.3)}
.btn-outline{border:1px solid var(--accent);color:var(--accent)}
.btn-outline:hover{background:rgba(255,46,149,.1)}

/* Sections */
section{padding:56px 0}
.section-title{font-size:1.6rem;margin-bottom:8px;text-align:center}
.section-desc{text-align:center;color:var(--muted);max-width:640px;margin:0 auto 36px}

/* Cards grid */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);box-shadow:0 8px 32px rgba(0,0,0,.35)}
.card-img{aspect-ratio:9/16;overflow:hidden;background:var(--bg3)}
.card-img img{width:100%;height:100%;object-fit:cover;object-position:top}
.card-body{padding:18px}
.card-body h3{font-size:1.05rem;margin-bottom:8px}
.card-body p{font-size:.9rem;color:var(--muted);line-height:1.6}

/* Feature blocks */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-bottom:48px}
.feature-row.reverse{direction:rtl}
.feature-row.reverse>*{direction:ltr}
.feature-img{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);max-width:320px;margin:0 auto}
.feature-text h3{font-size:1.3rem;margin-bottom:12px;color:var(--accent2)}
.feature-text p{color:var(--muted);margin-bottom:12px}
.feature-text ul{padding-left:20px;color:var(--muted)}
.feature-text li{margin-bottom:6px}

/* Info boxes */
.info-box{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:24px}
.info-box h3{font-size:1.15rem;margin-bottom:12px;color:var(--accent)}
.info-box p,.info-box li{color:var(--muted);font-size:.95rem}
.info-box ul{padding-left:20px;margin-top:8px}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;margin-top:32px}
.step{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-align:center}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent3));color:#fff;font-weight:700;margin-bottom:12px}
.step h4{margin-bottom:8px;font-size:1rem}
.step p{font-size:.85rem;color:var(--muted)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border);padding:20px 0}
.faq-item h4{font-size:1rem;margin-bottom:8px;color:var(--text)}
.faq-item p{font-size:.9rem;color:var(--muted)}

/* Content page */
.page-hero{padding:48px 0 32px;text-align:center;background:var(--bg2);border-bottom:1px solid var(--border)}
.page-hero h1{font-size:1.8rem;margin-bottom:8px}
.page-hero p{color:var(--muted);font-size:.95rem}
.content-page{padding:48px 0}
.content-page .container{max-width:860px}
.content-page h2{font-size:1.3rem;margin:32px 0 12px;color:var(--accent2)}
.content-page h3{font-size:1.1rem;margin:24px 0 8px}
.content-page p,.content-page li{color:var(--muted);margin-bottom:12px;font-size:.95rem}
.content-page ul,.content-page ol{padding-left:24px;margin-bottom:16px}

/* Error pages */
.error-page{min-height:80vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:40px 20px}
.error-code{font-size:6rem;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--accent3));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.error-page h1{font-size:1.5rem;margin:16px 0 8px}
.error-page p{color:var(--muted);margin-bottom:24px}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:48px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand p{color:var(--muted);font-size:.9rem;margin-top:12px;line-height:1.6}
.footer-links h4{font-size:.95rem;margin-bottom:12px;color:var(--text)}
.footer-links ul{list-style:none}
.footer-links li{margin-bottom:8px}
.footer-links a{color:var(--muted);font-size:.9rem}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid var(--border);color:var(--muted);font-size:.85rem}

/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:.85rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{margin:0 8px}

/* Responsive */
@media(max-width:768px){
  .nav-desktop{display:none}
  .menu-toggle{display:block}
  .feature-row{grid-template-columns:1fr;gap:24px}
  .feature-row.reverse{direction:ltr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  section{padding:40px 0}
  .hero{padding:40px 0 32px}
  .card-grid{grid-template-columns:1fr}
}