*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f0a1a;--bg2:#1a1230;--bg3:#251a3d;
  --text:#e8e4f0;--muted:#a89ec0;
  --accent:#ff6b9d;--accent2:#c44dff;--gold:#ffb347;
  --border:rgba(255,255,255,.08);--radius:12px;--max:1180px;
  --shadow:0 8px 32px rgba(0,0,0,.35)
}
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}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--gold)}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;z-index:9999;padding:8px 16px;background:var(--accent);color:#fff}
.skip-link:focus{left:0}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(15,10,26,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:var(--max);margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:1.15rem}
.logo img{width:40px;height:40px;border-radius:10px}
.nav-toggle{display:none;background:none;border:1px solid var(--border);color:var(--text);padding:6px 12px;border-radius:8px;cursor:pointer;font-size:.9rem}
.main-nav ul{display:flex;gap:6px;list-style:none;flex-wrap:wrap}
.main-nav a{display:block;padding:8px 14px;border-radius:8px;color:var(--muted);font-size:.92rem}
.main-nav a:hover,.main-nav a.active{color:var(--text);background:var(--bg3)}

/* Hero */
.hero{padding:56px 0 48px;background:linear-gradient(160deg,var(--bg2) 0%,var(--bg) 60%)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(1.6rem,4vw,2.4rem);line-height:1.3;margin-bottom:16px;background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{color:var(--muted);font-size:1.05rem;margin-bottom:24px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px}
.tag{display:inline-block;padding:4px 12px;border-radius:20px;background:var(--bg3);border:1px solid var(--border);font-size:.82rem;color:var(--muted)}
.btn{display:inline-block;padding:12px 28px;border-radius:10px;font-weight:600;font-size:.95rem;transition:transform .2s,box-shadow .2s}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 4px 20px rgba(255,107,157,.3)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 6px 28px rgba(255,107,157,.45)}
.btn-outline{border:1px solid var(--accent);color:var(--accent);margin-left:12px}
.btn-outline:hover{color:var(--gold);border-color:var(--gold)}
.hero-img{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border)}

/* Sections */
section{padding:56px 0}
.section-alt{background:var(--bg2)}
.section-title{text-align:center;margin-bottom:12px;font-size:clamp(1.3rem,3vw,1.8rem)}
.section-sub{text-align:center;color:var(--muted);max-width:640px;margin:0 auto 40px;font-size:.95rem}
.content-block{margin-bottom:32px}
.content-block h2{font-size:1.35rem;margin-bottom:14px;color:var(--text);padding-left:14px;border-left:3px solid var(--accent)}
.content-block h3{font-size:1.1rem;margin:20px 0 10px;color:var(--gold)}
.content-block p{margin-bottom:14px;color:var(--muted);text-align:justify}
.content-block ul,.content-block ol{margin:0 0 16px 24px;color:var(--muted)}
.content-block li{margin-bottom:8px}

/* Feature grid */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .25s}
.feature-card:hover{transform:translateY(-4px)}
.feature-card img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.feature-card-body{padding:18px}
.feature-card-body h3{font-size:1rem;margin-bottom:8px;color:var(--text)}
.feature-card-body p{font-size:.88rem;color:var(--muted);line-height:1.6}

/* Two column */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.two-col img{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border)}

/* Steps */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:24px 18px;text-align:center;position:relative}
.step::before{counter-increment:step;content:counter(step);display:block;width:36px;height:36px;line-height:36px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-weight:700;margin:0 auto 14px;font-size:.95rem}
.step h3{font-size:.95rem;margin-bottom:8px;color:var(--text)}
.step p{font-size:.85rem;color:var(--muted)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;background:var(--bg3);overflow:hidden}
.faq-item summary{padding:16px 20px;cursor:pointer;font-weight:600;color:var(--text);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::after{content:"+";font-size:1.2rem;color:var(--accent)}
.faq-item[open] summary::after{content:"−"}
.faq-item .faq-body{padding:0 20px 16px;color:var(--muted);font-size:.92rem}

/* Internal links box */
.link-box{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-top:32px}
.link-box h3{font-size:1rem;margin-bottom:12px;color:var(--text)}
.link-box ul{list-style:none;display:flex;flex-wrap:wrap;gap:10px}
.link-box li a{display:inline-block;padding:6px 14px;border-radius:8px;background:var(--bg2);border:1px solid var(--border);font-size:.88rem;color:var(--muted)}
.link-box li a:hover{color:var(--accent);border-color:var(--accent)}

/* Page (legal) */
.page-hero{padding:48px 0 32px;text-align:center;background:var(--bg2)}
.page-hero h1{font-size:clamp(1.4rem,3vw,2rem);margin-bottom:8px}
.page-hero p{color:var(--muted);font-size:.92rem}
.legal-content{max-width:860px;margin:0 auto;padding:40px 20px 60px}
.legal-content h2{font-size:1.2rem;margin:28px 0 12px;color:var(--text)}
.legal-content p,.legal-content li{color:var(--muted);font-size:.93rem;margin-bottom:12px}
.legal-content ol,.legal-content ul{margin-left:24px;margin-bottom:16px}
.legal-content .updated{color:var(--muted);font-size:.85rem;margin-bottom:24px}

/* Error pages */
.error-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;text-align:center;padding:40px 20px}
.error-page h1{font-size:clamp(3rem,10vw,6rem);background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.error-page h2{font-size:1.3rem;margin:12px 0;color:var(--text)}
.error-page p{color:var(--muted);max-width:480px;margin-bottom:28px}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand img{width:48px;border-radius:10px;margin-bottom:12px}
.footer-brand p{font-size:.88rem;color:var(--muted);max-width:360px}
.footer-col h4{font-size:.92rem;margin-bottom:14px;color:var(--text)}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{color:var(--muted);font-size:.88rem}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid var(--border);color:var(--muted);font-size:.82rem}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{margin:0 6px}

/* Responsive */
@media(max-width:960px){
  .hero-grid,.two-col,.feature-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .hero-img{max-width:320px;margin:0 auto}
}
@media(max-width:640px){
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--border);padding:12px 20px}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column}
  .btn-outline{margin-left:0;margin-top:12px;display:block;text-align:center}
  .steps{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .header-inner{position:relative}
}