/* kuailianoss.com.cn - 快连官网 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;color:#1e293b;background:#fff}
a{color:#2563eb;text-decoration:none;transition:color .2s}
a:hover{color:#1d4ed8;text-decoration:underline}
img{max-width:100%;height:auto}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:linear-gradient(135deg,#0f172a,#1e293b);position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(0,0,0,.1)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1200px;margin:0 auto;padding:0 20px}
.logo{display:flex;align-items:center;gap:10px}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,#3b82f6,#2563eb);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;font-weight:700}
.logo-text{color:#fff;font-size:22px;font-weight:700;letter-spacing:1px}
.logo-text span{color:#60a5fa}
.main-nav{display:flex;align-items:center;gap:32px}
.main-nav a{color:#cbd5e1;font-size:15px;font-weight:500;padding:4px 0;position:relative}
.main-nav a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:#3b82f6;transition:width .2s}
.main-nav a:hover,.main-nav a.active{color:#fff;text-decoration:none}
.main-nav a:hover::after,.main-nav a.active::after{width:100%}
.nav-down{background:linear-gradient(135deg,#3b82f6,#2563eb)!important;color:#fff!important;padding:8px 20px!important;border-radius:6px;font-weight:600!important}
.nav-down::after{display:none!important}
.nav-down:hover{background:linear-gradient(135deg,#2563eb,#1d4ed8)!important}
.menu-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.menu-toggle span{display:block;width:26px;height:3px;background:#fff;border-radius:2px}

/* Hero */
.hero{background:linear-gradient(135deg,#0f172a,#1e293b 50%,#0f172a);padding:70px 0 50px;text-align:center;overflow:hidden}
.hero h1{font-size:40px;font-weight:800;color:#fff;margin-bottom:16px}
.hero h1 span{background:linear-gradient(135deg,#60a5fa,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:17px;color:#94a3b8;max-width:680px;margin:0 auto 28px;line-height:1.9}

/* Download on homepage */
.home-download{padding:60px 0 50px}
.home-download .section-title{font-size:30px;font-weight:700;text-align:center;color:#0f172a;margin-bottom:8px}
.home-download .section-desc{text-align:center;color:#64748b;margin-bottom:36px}
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:1000px;margin:0 auto}
.dl-card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:28px 20px;text-align:center;transition:all .25s}
.dl-card:hover{box-shadow:0 8px 32px rgba(0,0,0,.08);border-color:#bfdbfe;transform:translateY(-3px)}
.dl-card .icon{font-size:38px;margin-bottom:10px}
.dl-card h3{font-size:17px;font-weight:600;color:#0f172a;margin-bottom:4px}
.dl-card .ver{font-size:12px;color:#94a3b8;margin-bottom:14px}
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 28px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:all .25s;border:none;text-decoration:none!important}
.btn-p{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;box-shadow:0 4px 16px rgba(37,99,235,.3)}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(37,99,235,.4);color:#fff}
.btn-o{background:transparent;color:#2563eb;border:2px solid #bfdbfe}
.btn-o:hover{border-color:#2563eb;transform:translateY(-2px);color:#2563eb}
.dl-card .info{font-size:11px;color:#94a3b8;margin-top:8px}
.dl-note{text-align:center;margin-top:32px;color:#94a3b8;font-size:14px}
.dl-note a{color:#2563eb;font-weight:600}

/* Section */
.section{padding:60px 0}
.section-alt{background:#f8fafc}
.section-title{font-size:28px;font-weight:700;text-align:center;margin-bottom:10px;color:#0f172a}
.section-desc{text-align:center;color:#64748b;max-width:600px;margin:0 auto 36px;font-size:15px}

/* Features grid */
.f-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.f-card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:28px 24px;transition:all .25s}
.f-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.08);border-color:#bfdbfe}
.f-card .fi{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#dbeafe,#bfdbfe);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px}
.f-card h3{font-size:17px;font-weight:600;color:#0f172a;margin-bottom:8px}
.f-card p{font-size:14px;color:#64748b;line-height:1.8}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:800px;margin:0 auto}
.step{text-align:center;padding:24px}
.step .num{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.step h4{font-size:16px;font-weight:600;color:#0f172a;margin-bottom:6px}
.step p{font-size:14px;color:#64748b}

/* Page banner */
.page-banner{background:linear-gradient(135deg,#0f172a,#1e293b);padding:56px 0;text-align:center}
.page-banner h1{font-size:34px;font-weight:800;color:#fff;margin-bottom:10px}
.page-banner p{color:#94a3b8;max-width:560px;margin:0 auto}
.breadcrumb{margin-top:14px;font-size:13px;color:#64748b}
.breadcrumb a{color:#94a3b8}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{color:#60a5fa}

/* Content */
.page-content{padding:56px 0}
.content-body{max-width:880px;margin:0 auto}
.content-body h2{font-size:23px;font-weight:700;color:#0f172a;margin:36px 0 14px;padding-bottom:10px;border-bottom:2px solid #e2e8f0}
.content-body h3{font-size:18px;font-weight:600;color:#1e293b;margin:24px 0 10px}
.content-body p{margin-bottom:14px;color:#475569;line-height:2}
.content-body ul,.content-body ol{margin:10px 0 18px 22px}
.content-body li{margin-bottom:6px;color:#475569;line-height:1.9;list-style:disc}
.content-body strong{color:#0f172a}

/* Features page detail */
.fd-grid{display:grid;gap:24px;margin-top:28px}
.fd-item{display:grid;grid-template-columns:70px 1fr;gap:20px;padding:24px;background:#fff;border:1px solid #e2e8f0;border-radius:12px}
.fd-num{width:70px;height:70px;border-radius:14px;background:linear-gradient(135deg,#dbeafe,#bfdbfe);display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:800;color:#2563eb}
.fd-text h3{font-size:17px;font-weight:600;color:#0f172a;margin-bottom:6px}
.fd-text p{font-size:14px;color:#64748b;line-height:1.8}

/* FAQ */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{border:1px solid #e2e8f0;border-radius:10px;margin-bottom:10px;overflow:hidden}
.faq-q{padding:16px 20px;font-size:15px;font-weight:600;color:#0f172a;cursor:pointer;display:flex;justify-content:space-between;align-items:center;background:#fff;user-select:none}
.faq-q::after{content:'+';font-size:18px;color:#94a3b8;font-weight:400}
.faq-item.active .faq-q::after{content:'−';color:#2563eb}
.faq-a{display:none;padding:0 20px 16px;color:#475569;line-height:1.9}
.faq-item.active .faq-a{display:block}

/* About */
.ab-mission{text-align:center;max-width:680px;margin:0 auto 36px;padding:28px;background:linear-gradient(135deg,#dbeafe,#eff6ff);border-radius:16px}
.ab-mission h2{font-size:20px;color:#1e40af;margin-bottom:10px;border:none}
.ab-mission p{color:#1e40af;font-size:15px}
.ab-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ab-card{text-align:center;padding:28px 20px;border:1px solid #e2e8f0;border-radius:12px}
.ab-card .num{font-size:32px;font-weight:800;color:#2563eb}
.ab-card h4{font-size:15px;font-weight:600;margin:8px 0;color:#0f172a}
.ab-card p{font-size:13px;color:#64748b}

/* CTA bottom */
.cta-bottom{text-align:center;margin-top:40px;padding:32px;background:linear-gradient(135deg,#f8fafc,#eff6ff);border-radius:16px}
.cta-bottom p{font-size:16px;color:#1e293b;margin-bottom:16px;font-weight:600}

/* Footer */
.site-footer{background:#0f172a;color:#94a3b8;padding:44px 0 28px}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;max-width:1200px;margin:0 auto;padding:0 20px}
.footer-brand .logo-text{font-size:20px}
.footer-brand p{margin-top:10px;font-size:13px;line-height:1.8}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:12px;font-weight:600}
.footer-col a{display:block;color:#94a3b8;font-size:13px;margin-bottom:6px}
.footer-col a:hover{color:#60a5fa;text-decoration:none}
.footer-bottom{text-align:center;padding-top:28px;margin-top:28px;border-top:1px solid rgba(255,255,255,.06);font-size:13px;max-width:1200px;margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px}

@media(max-width:992px){
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .f-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .menu-toggle{display:flex}
  .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#1e293b;flex-direction:column;padding:20px;gap:14px;border-top:1px solid rgba(255,255,255,.08)}
  .main-nav.open{display:flex}
  .hero h1{font-size:26px}
  .dl-grid,.f-grid,.steps,.ab-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr;gap:20px}
  .section-title{font-size:22px}
  .fd-item{grid-template-columns:1fr;text-align:center}
  .fd-num{margin:0 auto}
  .page-banner h1{font-size:24px}
}
@media(max-width:480px){
  .footer-inner{grid-template-columns:1fr}
}