*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0d0d12;--bg2:#16161f;--bg3:#1e1e2a;
  --text:#e8e8ef;--muted:#9a9ab0;--accent:#e84393;--accent2:#fd79a8;
  --gold:#f9ca24;--blue:#6c5ce7;--border:#2a2a3a;
  --radius:12px;--shadow:0 4px 24px rgba(0,0,0,.4);
  --max:1200px;--header-h:64px;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,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(--gold)}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius)}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(13,13,18,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--header-h)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);gap:16px}
.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{display:flex;gap:4px}
.nav a{padding:8px 14px;border-radius:8px;color:var(--muted);font-size:.9rem;white-space:nowrap}
.nav a:hover,.nav a.active{color:var(--text);background:var(--bg3)}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:4px 8px}

/* Hero */
.hero{padding:60px 0 40px;text-align:center;background:linear-gradient(180deg,var(--bg2) 0%,var(--bg) 100%)}
.hero h1{font-size:clamp(1.6rem,4vw,2.4rem);margin-bottom:16px;background:linear-gradient(135deg,var(--accent),var(--gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{color:var(--muted);max-width:720px;margin:0 auto 28px;font-size:1.05rem}
.btn-group{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:50px;font-weight:600;font-size:.95rem;transition:transform .2s,box-shadow .2s}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--blue));color:#fff;box-shadow:0 4px 16px rgba(232,67,147,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(232,67,147,.45);color:#fff}
.btn-outline{border:1px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent2)}

/* Sections */
section{padding:48px 0}
.section-title{font-size:1.5rem;margin-bottom:8px;display:flex;align-items:center;gap:10px}
.section-title::before{content:"";width:4px;height:24px;background:linear-gradient(var(--accent),var(--gold));border-radius:2px}
.section-desc{color:var(--muted);margin-bottom:32px;max-width:800px}
.bg-alt{background:var(--bg2)}

/* Feature grid */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.feature-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .2s,box-shadow .2s}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-card img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.feature-card .card-body{padding:16px}
.feature-card h3{font-size:1rem;margin-bottom:8px;color:var(--text)}
.feature-card p{font-size:.875rem;color:var(--muted);line-height:1.6}

/* Showcase */
.showcase{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.showcase.reverse{direction:rtl}
.showcase.reverse>*{direction:ltr}
.showcase img{border:1px solid var(--border);box-shadow:var(--shadow)}
.showcase h3{font-size:1.3rem;margin-bottom:12px}
.showcase p{color:var(--muted);margin-bottom:12px}

/* Tags */
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.tag{padding:4px 12px;background:var(--bg3);border:1px solid var(--border);border-radius:20px;font-size:.8rem;color:var(--muted)}

/* FAQ */
.faq-list{max-width:800px}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;background:var(--bg3)}
.faq-item summary{padding:16px 20px;cursor:pointer;font-weight:600;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-answer{padding:0 20px 16px;color:var(--muted);font-size:.925rem}

/* Content page */
.page-hero{padding:48px 0 32px;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)}
.content-block{max-width:860px;margin:0 auto;padding:40px 20px}
.content-block h2{font-size:1.25rem;margin:32px 0 12px;color:var(--accent2)}
.content-block h3{font-size:1.05rem;margin:24px 0 8px}
.content-block p,.content-block li{color:var(--muted);margin-bottom:12px}
.content-block ul,.content-block ol{padding-left:24px;margin-bottom:16px}
.content-block li{margin-bottom:6px}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:40px 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:.875rem;margin-top:12px;max-width:360px}
.footer-col h4{font-size:.9rem;margin-bottom:12px;color:var(--text)}
.footer-col a{display:block;color:var(--muted);font-size:.875rem;padding:4px 0}
.footer-col a:hover{color:var(--accent2)}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;text-align:center;color:var(--muted);font-size:.8rem}

/* 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 .code{font-size:6rem;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--blue));-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;max-width:480px}

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

/* Internal links box */
.link-box{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin:32px 0}
.link-box h4{margin-bottom:12px;font-size:.95rem}
.link-box a{display:inline-block;margin:4px 12px 4px 0;font-size:.875rem}

/* Responsive */
@media(max-width:900px){
  .showcase{grid-template-columns:1fr;gap:24px}
  .showcase.reverse{direction:ltr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:var(--bg2);flex-direction:column;padding:12px;border-bottom:1px solid var(--border)}
  .nav.open{display:flex}
  .menu-toggle{display:block}
  .header-inner{position:relative}
  .footer-grid{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .feature-card .card-body{padding:12px}
  .hero{padding:40px 0 28px}
}