/* 杏吧官网 - 全局样式 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0d0b14;
  --bg-card:#161222;
  --bg-card-hover:#1e1830;
  --text:#e8e4f0;
  --text-muted:#9b93ad;
  --accent:#ff4d8d;
  --accent2:#ff8c42;
  --gradient:linear-gradient(135deg,#ff4d8d,#ff8c42);
  --border:#2a2238;
  --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);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent2)}
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:100;
  background:rgba(13,11,20,.92);
  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{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}
.nav-desktop a{color:var(--text-muted);font-size:.95rem}
.nav-desktop a:hover,.nav-desktop a.active{color:var(--accent)}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:4px}
.nav-mobile{display:none;flex-direction:column;background:var(--bg-card);border-top:1px solid var(--border);padding:12px 20px}
.nav-mobile.open{display:flex}
.nav-mobile a{padding:12px 0;color:var(--text-muted);border-bottom:1px solid var(--border)}
.nav-mobile a:last-child{border-bottom:none}

/* Hero */
.hero{
  padding:60px 0 40px;
  background:radial-gradient(ellipse at 50% 0%,rgba(255,77,141,.12) 0%,transparent 60%);
}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.hero h1{font-size:2.2rem;line-height:1.3;margin-bottom:16px;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{color:var(--text-muted);font-size:1.05rem;margin-bottom:24px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 28px;border-radius:50px;font-size:.95rem;font-weight:600;
  border:none;cursor:pointer;transition:transform .2s,box-shadow .2s;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 4px 20px rgba(255,77,141,.35)}
.btn-outline{background:transparent;color:var(--accent);border:2px solid var(--accent)}
.hero-img{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border)}

/* Sections */
section{padding:50px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:1.75rem;margin-bottom:8px}
.section-title p{color:var(--text-muted);font-size:.95rem}
.section-title .line{width:50px;height:3px;background:var(--gradient);margin:12px auto 0;border-radius:2px}

/* Feature cards */
.features-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 24px;transition:border-color .2s,transform .2s;
}
.feature-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.feature-card .icon{font-size:2rem;margin-bottom:12px}
.feature-card h3{font-size:1.1rem;margin-bottom:8px}
.feature-card p{color:var(--text-muted);font-size:.9rem}

/* Content blocks */
.content-block{margin-bottom:40px}
.content-block h2{font-size:1.5rem;margin-bottom:16px;padding-left:14px;border-left:4px solid var(--accent)}
.content-block h3{font-size:1.15rem;margin:20px 0 10px;color:var(--accent2)}
.content-block p{margin-bottom:14px;color:var(--text-muted);text-align:justify}
.content-block ul,.content-block ol{margin:12px 0 16px 24px;color:var(--text-muted)}
.content-block li{margin-bottom:8px}
.content-block ol{list-style:decimal}
.content-block ul{list-style:disc}

/* Image showcase */
.showcase-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.showcase-item{
  background:var(--bg-card);border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--border);transition:transform .2s;
}
.showcase-item:hover{transform:scale(1.02)}
.showcase-item img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.showcase-item .caption{padding:14px 16px}
.showcase-item .caption h4{font-size:.95rem;margin-bottom:4px}
.showcase-item .caption p{font-size:.82rem;color:var(--text-muted)}

/* Two column layout */
.two-col{display:grid;grid-template-columns:1fr 280px;gap:40px}
.sidebar .widget{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;margin-bottom:20px;
}
.sidebar .widget h4{font-size:1rem;margin-bottom:12px;color:var(--accent)}
.sidebar .widget a{display:block;padding:6px 0;color:var(--text-muted);font-size:.9rem}
.sidebar .widget a:hover{color:var(--accent)}

/* 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-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(--text-muted);font-size:.92rem}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{text-align:center;padding:24px 16px;background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border)}
.step .num{
  width:40px;height:40px;border-radius:50%;background:var(--gradient);
  display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:700;color:#fff;
}
.step h4{font-size:.95rem;margin-bottom:6px}
.step p{font-size:.82rem;color:var(--text-muted)}

/* Page header */
.page-header{padding:40px 0 30px;text-align:center;border-bottom:1px solid var(--border);margin-bottom:30px}
.page-header h1{font-size:1.8rem;margin-bottom:8px}
.page-header p{color:var(--text-muted);font-size:.95rem}
.breadcrumb{font-size:.85rem;color:var(--text-muted);margin-bottom:12px}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--accent)}

/* Legal pages */
.legal-content{max-width:860px;margin:0 auto;padding-bottom:60px}
.legal-content h2{font-size:1.3rem;margin:28px 0 12px;color:var(--accent2)}
.legal-content h3{font-size:1.05rem;margin:20px 0 8px}
.legal-content p,.legal-content li{color:var(--text-muted);margin-bottom:10px;font-size:.93rem}
.legal-content ul,.legal-content ol{margin-left:24px;margin-bottom:14px}
.legal-content ul{list-style:disc}
.legal-content ol{list-style:decimal}

/* Error pages */
.error-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:70vh;text-align:center;padding:40px 20px}
.error-page .code{font-size:6rem;font-weight:800;background:var(--gradient);-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(--text-muted);margin-bottom:24px}

/* Footer */
.site-footer{background:var(--bg-card);border-top:1px solid var(--border);padding:40px 0 20px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-brand p{color:var(--text-muted);font-size:.88rem;margin-top:10px;line-height:1.6}
.footer-col h4{font-size:.95rem;margin-bottom:14px}
.footer-col a{display:block;color:var(--text-muted);font-size:.88rem;padding:4px 0}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--border);color:var(--text-muted);font-size:.82rem}

/* Breadcrumb nav */
.toc{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:30px}
.toc h4{margin-bottom:10px;font-size:.95rem}
.toc ol{margin-left:20px;color:var(--text-muted);font-size:.88rem}
.toc li{margin-bottom:4px}
.toc a{color:var(--text-muted)}
.toc a:hover{color:var(--accent)}

/* Responsive */
@media(max-width:992px){
  .hero-grid,.two-col{grid-template-columns:1fr}
  .features-grid,.showcase-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-img{max-width:320px;margin:0 auto}
}
@media(max-width:768px){
  .nav-desktop{display:none}
  .menu-toggle{display:block}
  .hero{padding:36px 0 24px}
  .hero h1{font-size:1.6rem}
  .features-grid,.showcase-grid,.steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  section{padding:36px 0}
  .showcase-item img{max-height:400px}
}