/* Kuailian VPN – shared styles */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;color:#0f172a;background:#fcfbf8;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.25;color:#0f172a}
p{margin:0 0 1em}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(252,251,248,.85);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid rgba(15,23,42,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:#1e40af}
.brand img{width:36px;height:36px}
.brand span{letter-spacing:2px}
.nav-links{display:flex;gap:32px;list-style:none;margin:0;padding:0}
.nav-links a{font-size:15px;color:#334155;font-weight:500;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:#2563eb}
.nav-actions{display:flex;align-items:center;gap:12px}
.lang{font-size:14px;color:#475569;padding:8px 12px;border-radius:8px}
.lang:hover{background:#f1f5f9}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:999px;font-weight:600;font-size:15px;transition:all .2s;border:1px solid transparent;cursor:pointer;white-space:nowrap}
.btn-primary{background:#2563eb;color:#fff;box-shadow:0 8px 20px -8px rgba(37,99,235,.55)}
.btn-primary:hover{background:#1d4ed8;transform:translateY(-1px)}
.btn-outline{border-color:#2563eb;color:#2563eb;background:#fff}
.btn-outline:hover{background:#eff6ff}
.btn-lg{padding:14px 30px;font-size:16px}

/* Hero */
.hero{position:relative;padding:80px 0 100px;background:linear-gradient(180deg,#eff6ff 0%,#fcfbf8 100%);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:url("https://kuailam.com.cn/images/hero-bg.jpg") center/cover no-repeat;opacity:.35;pointer-events:none}
.hero .container{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;background:#dbeafe;color:#1d4ed8;font-size:13px;font-weight:600;border-radius:999px;margin-bottom:20px}
.hero h1{font-size:56px;font-weight:800;letter-spacing:-.02em;margin-bottom:20px}
.hero h1 .accent{color:#2563eb;border-bottom:6px solid #93c5fd;padding-bottom:2px}
.hero .lead{font-size:17px;color:#475569;max-width:520px;margin-bottom:32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.hero-stats{display:flex;gap:44px}
.hero-stats .stat strong{display:block;font-size:28px;font-weight:800;color:#0f172a}
.hero-stats .stat span{font-size:13px;color:#64748b}

/* Connection card */
.conn-card{background:#fff;border-radius:24px;padding:26px;box-shadow:0 30px 60px -30px rgba(30,64,175,.25);border:1px solid rgba(15,23,42,.05)}
.conn-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.dots{display:flex;gap:6px}
.dots i{width:11px;height:11px;border-radius:50%;background:#e2e8f0;display:block}
.dots i:nth-child(1){background:#ef4444}
.dots i:nth-child(2){background:#f59e0b}
.dots i:nth-child(3){background:#10b981}
.status{font-size:13px;color:#059669;font-weight:600;display:flex;align-items:center;gap:6px}
.status::before{content:"";width:8px;height:8px;border-radius:50%;background:#10b981;box-shadow:0 0 0 4px rgba(16,185,129,.2)}
.conn-row{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;background:#f8fafc;border-radius:14px;margin-bottom:10px;font-size:14px}
.conn-row .label{color:#475569}
.conn-row .value{font-weight:600;color:#0f172a}
.conn-row .value.green{color:#059669}
.conn-btn{margin-top:14px;width:100%;padding:16px;background:#2563eb;color:#fff;border:none;border-radius:14px;font-size:16px;font-weight:600;cursor:pointer}
.conn-btn:hover{background:#1d4ed8}

/* Sections */
section{padding:88px 0}
.section-head{text-align:center;max-width:640px;margin:0 auto 56px}
.section-head h2{font-size:40px;font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.section-head p{color:#64748b;font-size:17px}

/* Feature grid */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-5{grid-template-columns:repeat(5,1fr)}
.card{background:#fff;border:1px solid rgba(15,23,42,.06);border-radius:20px;padding:32px;transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);box-shadow:0 24px 40px -24px rgba(15,23,42,.15)}
.card .icon{font-size:32px;margin-bottom:16px;display:block}
.card h3{font-size:19px;font-weight:700;margin-bottom:8px}
.card p{color:#64748b;font-size:15px;margin:0}

/* Stats band */
.stats-band{background:#0f172a;color:#fff;padding:72px 0}
.stats-band h2{color:#fff;text-align:center;font-size:34px;margin-bottom:8px}
.stats-band .sub{text-align:center;color:#94a3b8;margin-bottom:48px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-big strong{display:block;font-size:44px;font-weight:800;color:#60a5fa;margin-bottom:4px}
.stat-big span{color:#cbd5e1;font-size:14px}
.badges{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-top:48px}
.badge{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);color:#e2e8f0;padding:8px 16px;border-radius:999px;font-size:13px}

/* Download */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.dl-card{background:#fff;border:1px solid rgba(15,23,42,.06);border-radius:20px;padding:28px 20px;text-align:center;transition:all .2s}
.dl-card:hover{border-color:#2563eb;transform:translateY(-4px)}
.dl-card .os{font-size:44px;margin-bottom:12px}
.dl-card h4{font-size:17px;font-weight:700;margin-bottom:4px}
.dl-card .ver{color:#94a3b8;font-size:13px;margin-bottom:16px;display:block}
.dl-card .btn{width:100%}

/* Pricing */
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.plan{background:#fff;border:1px solid rgba(15,23,42,.08);border-radius:22px;padding:32px;position:relative;display:flex;flex-direction:column}
.plan.featured{border-color:#2563eb;box-shadow:0 20px 40px -20px rgba(37,99,235,.35);transform:scale(1.03)}
.plan-tag{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:#f97316;color:#fff;font-size:12px;font-weight:700;padding:5px 14px;border-radius:999px}
.plan h3{font-size:20px;font-weight:700}
.plan .sub{color:#94a3b8;font-size:13px;margin-bottom:20px}
.plan .price{font-size:36px;font-weight:800;color:#0f172a;margin-bottom:4px}
.plan .price small{font-size:15px;color:#64748b;font-weight:500}
.plan .old{color:#94a3b8;text-decoration:line-through;font-size:14px;margin-bottom:20px;display:block}
.plan ul{list-style:none;padding:0;margin:0 0 24px;flex:1}
.plan li{padding:8px 0;color:#334155;font-size:14px;display:flex;align-items:center;gap:8px}
.plan li::before{content:"✓";color:#10b981;font-weight:700}

/* Testimonials */
.tst-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tst{background:#fff;border:1px solid rgba(15,23,42,.06);border-radius:20px;padding:28px}
.stars{color:#f59e0b;letter-spacing:2px;margin-bottom:14px}
.tst .quote{color:#334155;font-size:15px;margin-bottom:20px}
.tst .who{display:flex;align-items:center;gap:12px}
.avatar{width:42px;height:42px;border-radius:50%;background:#dbeafe;color:#1d4ed8;display:flex;align-items:center;justify-content:center;font-weight:700}
.who .name{font-weight:600;font-size:14px}
.who .role{color:#94a3b8;font-size:12px}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{background:#fff;border:1px solid rgba(15,23,42,.06);border-radius:16px;margin-bottom:14px;overflow:hidden}
.faq-item summary{padding:20px 24px;cursor:pointer;font-weight:600;font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:#2563eb;font-weight:400;transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 24px 22px;color:#475569;font-size:15px}
.faq-body h4{font-size:14px;color:#2563eb;margin:16px 0 6px}

/* Content page */
.page-hero{padding:72px 0 40px;background:linear-gradient(180deg,#eff6ff,#fcfbf8)}
.page-hero h1{font-size:44px;font-weight:800;letter-spacing:-.02em;text-align:center;margin-bottom:12px}
.page-hero .lead{text-align:center;color:#64748b;font-size:17px;max-width:640px;margin:0 auto}

/* About */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-grid h2{font-size:32px}
.about-grid p{color:#475569;font-size:16px}
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:32px}

/* Footer */
.site-footer{background:#0b1220;color:#94a3b8;padding:64px 0 32px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:40px;margin-bottom:40px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:10px}
.site-footer a:hover{color:#fff}
.foot-brand p{max-width:320px;margin:12px 0 0;color:#94a3b8}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;color:#64748b}

/* CTA */
.cta{background:linear-gradient(135deg,#2563eb,#1e40af);color:#fff;text-align:center;padding:80px 24px;border-radius:28px;margin:0 24px 88px;max-width:1200px;margin-left:auto;margin-right:auto}
.cta h2{color:#fff;font-size:36px;margin-bottom:12px}
.cta p{color:#dbeafe;font-size:17px;margin-bottom:28px}
.cta .btn-primary{background:#fff;color:#1e40af}
.cta .btn-primary:hover{background:#eff6ff}

/* Responsive */
@media (max-width:960px){
  .nav-links{display:none}
  .hero{padding:56px 0 72px}
  .hero .container{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:38px}
  .grid-3,.grid-4,.grid-5,.dl-grid,.price-grid,.stats-grid,.tst-grid,.foot-grid,.about-grid,.value-grid{grid-template-columns:1fr 1fr}
  .plan.featured{transform:none}
  section{padding:64px 0}
  .section-head h2{font-size:30px}
}
@media (max-width:560px){
  .grid-3,.grid-4,.grid-5,.dl-grid,.price-grid,.stats-grid,.tst-grid,.foot-grid,.about-grid,.value-grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .hero-stats{gap:24px}
}