/* 杏吧官网 - 响应式样式 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0e1a;--bg2:#12182b;--bg3:#1a2238;
  --primary:#e91e8c;--primary2:#ff6b35;--accent:#7c4dff;
  --text:#e8eaf0;--text2:#9aa3b8;--border:#2a3350;
  --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:-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}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary2)}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,14,26,.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:100%;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-desktop{display:flex;gap:28px;list-style:none}
.nav-desktop a{color:var(--text2);font-size:.95rem;font-weight:500}
.nav-desktop a:hover,.nav-desktop a.active{color:var(--primary)}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:4px 8px}
.nav-mobile{display:none;position:fixed;top:var(--header-h);left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--border);padding:16px 20px;z-index:99}
.nav-mobile.open{display:block}
.nav-mobile ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.nav-mobile a{color:var(--text);font-size:1rem;display:block;padding:8px 0}

/* Hero */
.hero{padding:60px 0 40px;background:linear-gradient(135deg,var(--bg) 0%,var(--bg2) 50%,#1a0a2e 100%);text-align:center}
.hero h1{font-size:clamp(1.6rem,4vw,2.4rem);line-height:1.35;margin-bottom:16px;background:linear-gradient(90deg,var(--primary),var(--primary2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:1.05rem;color:var(--text2);max-width:720px;margin:0 auto 28px}
.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;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 4px 16px rgba(233,30,140,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(233,30,140,.5);color:#fff}
.btn-outline{background:transparent;color:var(--text);border:2px solid var(--border)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}

/* Sections */
section{padding:56px 0}
.section-title{font-size:1.6rem;margin-bottom:8px;text-align:center}
.section-subtitle{text-align:center;color:var(--text2);margin-bottom:36px;font-size:.95rem}
.section-title span{color:var(--primary)}

/* Feature Grid */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;transition:border-color .2s,transform .2s}
.feature-card:hover{border-color:var(--primary);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(--text2);font-size:.9rem}

/* Content Block */
.content-block{margin-bottom:48px}
.content-block h2{font-size:1.35rem;margin-bottom:16px;padding-left:14px;border-left:4px solid var(--primary)}
.content-block h3{font-size:1.1rem;margin:20px 0 10px;color:var(--primary2)}
.content-block p,.content-block li{color:var(--text2);margin-bottom:12px;font-size:.95rem}
.content-block ul,.content-block ol{padding-left:24px;margin-bottom:16px}
.content-block li{margin-bottom:6px}

/* Screenshot Gallery */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0}
.gallery-item{background:var(--bg2);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:transform .2s}
.gallery-item:hover{transform:scale(1.03)}
.gallery-item img{width:100%;aspect-ratio:9/16;object-fit:cover}
.gallery-item figcaption{padding:10px 12px;font-size:.82rem;color:var(--text2);text-align:center}

/* Two Column Layout */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;margin:32px 0}
.two-col img{border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow)}

/* Steps */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:32px 0}
.step-item{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px 20px;text-align:center;position:relative}
.step-item::before{counter-increment:step;content:counter(step);display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-radius:50%;font-weight:700;margin:0 auto 12px;font-size:.9rem}
.step-item h4{font-size:.95rem;margin-bottom:6px}
.step-item p{font-size:.85rem;color:var(--text2)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq-q{padding:16px 20px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:.95rem}
.faq-q::after{content:"+";font-size:1.2rem;color:var(--primary);transition:transform .2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .3s,padding .3s;color:var(--text2);font-size:.9rem}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 16px}

/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:.85rem;color:var(--text2)}
.breadcrumb a{color:var(--text2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{margin:0 8px}

/* Page Content (sub pages) */
.page-hero{padding:40px 0 24px;text-align:center;border-bottom:1px solid var(--border);margin-bottom:32px}
.page-hero h1{font-size:1.8rem;margin-bottom:8px}
.page-hero p{color:var(--text2);font-size:.95rem}
.page-content{max-width:860px;margin:0 auto;padding-bottom:60px}
.page-content h2{font-size:1.2rem;margin:28px 0 12px;color:var(--primary)}
.page-content p,.page-content li{color:var(--text2);font-size:.93rem;margin-bottom:10px}
.page-content ul,.page-content ol{padding-left:24px;margin-bottom:16px}

/* 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 h1{font-size:5rem;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.error-page h2{font-size:1.4rem;margin:16px 0 8px}
.error-page p{color:var(--text2);margin-bottom:24px}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:40px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand p{color:var(--text2);font-size:.88rem;margin-top:10px;line-height:1.6}
.footer-col h4{font-size:.95rem;margin-bottom:12px;color:var(--text)}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{color:var(--text2);font-size:.88rem}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--border);color:var(--text2);font-size:.82rem}

/* TOC */
.toc{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin-bottom:32px}
.toc h3{font-size:1rem;margin-bottom:10px}
.toc ol{padding-left:20px}
.toc li{margin-bottom:4px;font-size:.9rem}
.toc a{color:var(--text2)}
.toc a:hover{color:var(--primary)}

/* Responsive */
@media(max-width:992px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .two-col{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-desktop{display:none}
  .menu-toggle{display:block}
  .feature-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero{padding:40px 0 28px}
  section{padding:36px 0}
}