*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0a12;--bg2:#12121f;--bg3:#1a1a2e;
  --text:#e8e8f0;--muted:#9a9ab0;
  --accent:#e84393;--accent2:#fd79a8;--gold:#d4af37;
  --border:#2a2a40;--radius:12px;--max:1200px;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;min-height:100vh;display:flex;flex-direction:column}
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:8px}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:var(--bg2);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text)}
.logo img{width:40px;height:40px;border-radius:10px}
.nav-main{display:flex;gap:6px;flex-wrap:wrap}
.nav-main a{padding:8px 16px;border-radius:20px;color:var(--muted);font-size:.95rem}
.nav-main a:hover,.nav-main a.active{background:linear-gradient(135deg,var(--accent),#6c5ce7);color:#fff}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer}

/* Hero */
.hero{background:linear-gradient(135deg,#1a1a2e 0%,#2d1b4e 50%,#1a1a2e 100%);padding:60px 0;text-align:center;border-bottom:1px solid var(--border)}
.hero h1{font-size:2.2rem;margin-bottom:16px;background:linear-gradient(90deg,var(--accent2),var(--gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{color:var(--muted);font-size:1.1rem;max-width:700px;margin:0 auto 28px}
.btn{display:inline-block;padding:14px 32px;border-radius:30px;font-weight:600;font-size:1rem;transition:transform .2s,box-shadow .2s}
.btn-primary{background:linear-gradient(135deg,var(--accent),#6c5ce7);color:#fff;box-shadow:0 4px 20px rgba(232,67,147,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(232,67,147,.45);color:#fff}
.btn-outline{border:2px solid var(--accent);color:var(--accent2);margin-left:12px}
.btn-outline:hover{background:var(--accent);color:#fff}

/* Sections */
section{padding:50px 0}
.section-title{font-size:1.6rem;margin-bottom:8px;color:var(--text)}
.section-desc{color:var(--muted);margin-bottom:32px;font-size:.95rem}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-4px);border-color:var(--accent)}
.card img{width:100%;aspect-ratio:9/16;object-fit:cover;border-radius:0}
.card-body{padding:16px}
.card-body h3{font-size:1rem;margin-bottom:6px;color:var(--text)}
.card-body p{font-size:.85rem;color:var(--muted);line-height:1.5}
.feature-icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--accent),#6c5ce7);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:14px}
.feature-item{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.feature-item h3{font-size:1.05rem;margin-bottom:8px}
.feature-item p{font-size:.9rem;color:var(--muted)}

/* Content */
.content-page{padding:40px 0 60px;flex:1}
.content-page h1{font-size:1.8rem;margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--accent)}
.content-page h2{font-size:1.3rem;margin:28px 0 12px;color:var(--accent2)}
.content-page h3{font-size:1.1rem;margin:20px 0 8px}
.content-page p,.content-page li{margin-bottom:12px;color:var(--muted)}
.content-page ul,.content-page ol{padding-left:24px;margin-bottom:16px}
.content-page ul li{list-style:disc}
.content-page ol li{list-style:decimal}
.article-img{margin:24px 0;border-radius:var(--radius);border:1px solid var(--border)}
.text-block{max-width:860px}
.text-block p{text-align:justify}

/* Tags */
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.tag{display:inline-block;padding:4px 12px;border-radius:16px;font-size:.8rem;background:var(--bg3);color:var(--accent2);border:1px solid var(--border)}

/* TOC */
.toc{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin-bottom:32px}
.toc h2{font-size:1rem;margin-bottom:12px;color:var(--text)}
.toc ol{padding-left:20px}
.toc li{margin-bottom:6px;font-size:.9rem}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:40px 0 24px;margin-top:auto}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-grid h4{font-size:.95rem;margin-bottom:12px;color:var(--text)}
.footer-grid p,.footer-grid a{font-size:.85rem;color:var(--muted);display:block;margin-bottom:6px}
.footer-grid a:hover{color:var(--accent2)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--border);font-size:.8rem;color:var(--muted)}

/* Error pages */
.error-page{text-align:center;padding:80px 20px;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center}
.error-page h1{font-size:5rem;background:linear-gradient(90deg,var(--accent),#6c5ce7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.error-page p{color:var(--muted);margin:16px 0 28px;font-size:1.1rem}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent2)}
.breadcrumb span{margin:0 6px}

/* Responsive */
@media(max-width:992px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .menu-toggle{display:block}
  .header-inner{position:relative;padding:14px 16px;flex-wrap:nowrap}
  .nav-main{display:none}
  .nav-main.open{display:flex;position:absolute;top:100%;left:0;right:0;width:100%;flex-direction:column;padding:8px 16px 16px;gap:6px;box-sizing:border-box;background:var(--bg2);border-bottom:1px solid var(--border);box-shadow:0 8px 24px rgba(0,0,0,.3);z-index:101}
  .nav-main a{padding:10px 16px;width:100%;box-sizing:border-box}
  .hero h1{font-size:1.6rem}
  .hero{padding:40px 0}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .btn-outline{display:inline-block;margin:12px 0 0}
  section{padding:36px 0}
}
@media(max-width:480px){
  .grid-4{grid-template-columns:1fr}
  .hero h1{font-size:1.35rem}
}