/* 91PORN官网 - 全局样式 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0a0f;
  --bg-card:#14141f;
  --bg-card-hover:#1c1c2e;
  --primary:#ff9900;
  --primary-dark:#e68a00;
  --accent:#7c5cfc;
  --accent-light:#9b7dff;
  --text:#f0f0f5;
  --text-muted:#9a9ab0;
  --border:#2a2a3e;
  --radius:12px;
  --shadow:0 4px 24px rgba(0,0,0,.4);
  --max-w: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:1.7;
  min-height:100vh;
}
a{color:var(--accent-light);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary)}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
.container{max-width:var(--max-w);margin:0 auto;padding:0 20px}

/* Header */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(10,10,15,.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);
}
.logo-link{display:flex;align-items:center;gap:10px}
.logo-link img{width:40px;height:40px;border-radius:8px}
.logo-text{font-size:1.25rem;font-weight:700;color:var(--text)}
.logo-text span{color:var(--primary)}
.main-nav{display:flex;gap:28px}
.main-nav a{color:var(--text-muted);font-size:.95rem;font-weight:500}
.main-nav a:hover,.main-nav a.active{color:var(--primary)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text);margin:5px 0;transition:.3s}

/* Hero */
.hero{
  padding:60px 0 40px;
  background:linear-gradient(180deg,rgba(124,92,252,.08) 0%,transparent 60%);
}
.hero-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.hero h1{font-size:2.2rem;line-height:1.3;margin-bottom:16px}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-desc{color:var(--text-muted);font-size:1.05rem;margin-bottom:28px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--bg-card);border:1px solid var(--border);
  padding:6px 14px;border-radius:20px;font-size:.85rem;color:var(--text-muted);
}
.badge strong{color:var(--primary)}
.btn-group{display:flex;flex-wrap:wrap;gap:14px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 28px;border-radius:var(--radius);
  font-size:1rem;font-weight:600;border:none;cursor:pointer;transition:.2s;
}
.btn-primary{background:var(--primary);color:#000}
.btn-primary:hover{background:var(--primary-dark);color:#000}
.btn-outline{background:transparent;border:2px solid var(--accent);color:var(--accent-light)}
.btn-outline:hover{background:var(--accent);color:#fff}
.hero-phone{text-align:center}
.hero-phone img{
  max-width:280px;margin:0 auto;
  border-radius:24px;box-shadow:var(--shadow);
  border:3px solid var(--border);
}

/* Section */
.section{padding:56px 0}
.section-header{text-align:center;margin-bottom:40px}
.section-header h2{font-size:1.75rem;margin-bottom:10px}
.section-header h2 em{font-style:normal;color:var(--primary)}
.section-header p{color:var(--text-muted);max-width:640px;margin:0 auto}
.section-label{
  display:inline-block;font-size:.8rem;text-transform:uppercase;
  letter-spacing:2px;color:var(--accent);margin-bottom:8px;
}

/* Feature Grid */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px;transition:.3s;
}
.feature-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.feature-icon{
  width:48px;height:48px;border-radius:12px;
  background:linear-gradient(135deg,var(--accent),var(--primary));
  display:flex;align-items:center;justify-content:center;
  font-size:1.4rem;margin-bottom:16px;
}
.feature-card h3{font-size:1.1rem;margin-bottom:8px}
.feature-card p{color:var(--text-muted);font-size:.9rem}

/* Screenshot Showcase */
.showcase-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.showcase-item{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;
}
.showcase-item img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.showcase-body{padding:20px}
.showcase-body h3{font-size:1.05rem;margin-bottom:8px;color:var(--primary)}
.showcase-body p{color:var(--text-muted);font-size:.9rem}

/* Category Tags */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.tag{
  background:var(--bg-card);border:1px solid var(--border);
  padding:8px 18px;border-radius:20px;font-size:.88rem;color:var(--text-muted);
  transition:.2s;
}
.tag:hover{border-color:var(--primary);color:var(--primary)}

/* Content Article */
.article-content{max-width:860px;margin:0 auto}
.article-content h2{font-size:1.4rem;margin:36px 0 14px;color:var(--primary)}
.article-content h3{font-size:1.15rem;margin:28px 0 10px}
.article-content p{margin-bottom:16px;color:var(--text-muted)}
.article-content ul,.article-content ol{margin:0 0 16px 24px;color:var(--text-muted)}
.article-content li{margin-bottom:8px}
.article-content strong{color:var(--text)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);margin-bottom:12px;overflow:hidden;
}
.faq-q{
  padding:18px 24px;cursor:pointer;font-weight:600;
  display:flex;justify-content:space-between;align-items:center;
}
.faq-q::after{content:"+";font-size:1.2rem;color:var(--accent)}
.faq-item.open .faq-q::after{content:"−"}
.faq-a{padding:0 24px 18px;color:var(--text-muted);font-size:.92rem;display:none}
.faq-item.open .faq-a{display:block}

/* Page Header */
.page-hero{
  padding:48px 0 32px;
  background:linear-gradient(180deg,rgba(124,92,252,.06) 0%,transparent 100%);
  border-bottom:1px solid var(--border);
}
.page-hero h1{font-size:1.8rem;margin-bottom:8px}
.page-hero p{color:var(--text-muted)}
.breadcrumb{font-size:.85rem;color:var(--text-muted);margin-bottom:12px}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}

/* Error Pages */
.error-page{
  min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;
  padding:40px 20px;
}
.error-code{font-size:6rem;font-weight:800;color:var(--accent);line-height:1}
.error-page h1{font-size:1.5rem;margin:16px 0 8px}
.error-page p{color:var(--text-muted);margin-bottom:24px}

/* Footer */
.site-footer{
  background:var(--bg-card);border-top:1px solid var(--border);
  padding:48px 0 24px;margin-top:40px;
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;
  margin-bottom:32px;
}
.footer-brand p{color:var(--text-muted);font-size:.9rem;margin-top:12px}
.footer-col h4{font-size:.95rem;margin-bottom:14px;color:var(--text)}
.footer-col a{display:block;color:var(--text-muted);font-size:.88rem;margin-bottom:8px}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:20px;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:12px;
}
.footer-bottom p{color:var(--text-muted);font-size:.82rem}

/* Download Banner */
.download-banner{
  background:linear-gradient(135deg,rgba(124,92,252,.15),rgba(255,153,0,.1));
  border:1px solid var(--border);border-radius:var(--radius);
  padding:40px;text-align:center;margin:40px 0;
}
.download-banner h3{font-size:1.3rem;margin-bottom:10px}
.download-banner p{color:var(--text-muted);margin-bottom:20px}

/* Internal Links */
.internal-links{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:32px 0;
}
.internal-link{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:16px;text-align:center;
  color:var(--text-muted);font-size:.9rem;transition:.2s;
}
.internal-link:hover{border-color:var(--primary);color:var(--primary)}

/* Responsive */
@media(max-width:992px){
  .hero-grid{grid-template-columns:1fr;text-align:center}
  .hero-phone{order:-1}
  .hero-phone img{max-width:220px}
  .hero-badges,.btn-group{justify-content:center}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .showcase-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .internal-links{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .main-nav{
    display:none;position:fixed;top:var(--header-h);left:0;right:0;
    background:var(--bg-card);flex-direction:column;padding:20px;
    border-bottom:1px solid var(--border);gap:16px;
  }
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .hero h1{font-size:1.6rem}
  .feature-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .internal-links{grid-template-columns:1fr}
  .section{padding:40px 0}
}