*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --blue:#1a6ef5;
  --blue-dark:#1255cc;
  --blue-light:#e8f0fe;
  --text:#1a1a2e;
  --text-muted:#6b7280;
  --border:#e5e7eb;
  --bg:#f8f9fb;
  --white:#ffffff;
  --radius:12px;
  --shadow:0 2px 16px rgba(26,110,245,.10);
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Microsoft YaHei',system-ui,sans-serif;color:var(--text);background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{display:block;max-width:100%}
.container{max-width:1140px;margin:0 auto;padding:0 20px}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;font-weight:700;color:var(--text);margin-bottom:10px}
.section-title p{color:var(--text-muted);font-size:1rem}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;border:none;transition:all .2s ease;text-decoration:none;line-height:1}
.btn-primary{background:var(--blue);color:var(--white)}
.btn-primary:hover{background:var(--blue-dark);transform:translateY(-1px)}
.btn-outline{background:transparent;color:var(--blue);border:2px solid var(--blue)}
.btn-outline:hover{background:var(--blue-light)}
.badge{display:inline-block;background:var(--blue);color:var(--white);font-size:.75rem;font-weight:700;padding:3px 10px;border-radius:20px}

/* ── NAV ── */
#nav{position:fixed;top:0;left:0;right:0;z-index:999;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
#nav.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-logo{display:flex;align-items:center;gap:8px;font-size:1.15rem;font-weight:700;color:var(--blue)}
.nav-logo svg{width:28px;height:28px;flex-shrink:0}
.nav-menu{display:flex;gap:4px}
.nav-menu a{padding:6px 14px;border-radius:6px;font-size:.9rem;font-weight:500;color:var(--text);transition:all .2s}
.nav-menu a:hover,.nav-menu a.active{color:var(--blue);background:var(--blue-light)}
.nav-cta{display:flex;gap:10px;align-items:center}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px;color:var(--text)}
.nav-toggle svg{width:24px;height:24px}

/* ── HERO ── */
#hero{padding:120px 0 80px;background:linear-gradient(135deg,#f0f5ff 0%,#e8f0fe 50%,#f8f9fb 100%);text-align:center;position:relative;overflow:hidden}
#hero::before{content:'';position:absolute;top:-80px;right:-80px;width:400px;height:400px;background:radial-gradient(circle,rgba(26,110,245,.12) 0%,transparent 70%);pointer-events:none}
.hero-eyebrow{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:20px}
.hero-eyebrow span{font-size:.82rem;color:var(--text-muted);background:var(--white);border:1px solid var(--border);border-radius:20px;padding:4px 12px}
.hero-title{font-size:3.2rem;font-weight:800;line-height:1.15;color:var(--text);margin-bottom:18px;letter-spacing:-.02em}
.hero-title span{color:var(--blue)}
.hero-desc{font-size:1.1rem;color:var(--text-muted);max-width:580px;margin:0 auto 32px}
.hero-stats{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:36px}
.hero-stats .stat{display:flex;align-items:center;gap:6px;font-size:.88rem;color:var(--text-muted);background:var(--white);padding:6px 14px;border-radius:20px;border:1px solid var(--border)}
.hero-stats .stat svg{color:var(--blue);width:14px;height:14px;flex-shrink:0}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ── FEATURES ── */
#features{padding:80px 0;background:var(--white)}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{background:var(--bg);border-radius:var(--radius);padding:28px 22px;transition:transform .25s,box-shadow .25s}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-icon{font-size:2rem;margin-bottom:14px;display:block}
.feature-card h3{font-size:1.05rem;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:.88rem;color:var(--text-muted);line-height:1.6}

/* ── SPEED ── */
#speed{padding:80px 0;background:var(--bg)}
.speed-inner{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.speed-content h2{font-size:2.2rem;font-weight:800;line-height:1.2;margin-bottom:16px}
.speed-content p{color:var(--text-muted);margin-bottom:36px;line-height:1.7}
.speed-numbers{display:flex;gap:40px}
.speed-num{text-align:left}
.speed-num strong{display:block;font-size:2.4rem;font-weight:800;color:var(--blue);line-height:1}
.speed-num span{font-size:.82rem;color:var(--text-muted);margin-top:4px;display:block}
.speed-visual{background:linear-gradient(135deg,#1a6ef5,#0d47d9);border-radius:20px;padding:40px;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:280px;gap:16px}
.speed-rocket{font-size:4rem}
.speed-visual-label{color:rgba(255,255,255,.85);font-size:.95rem;font-weight:600;letter-spacing:.05em}
.speed-bar{width:80%;height:6px;background:rgba(255,255,255,.2);border-radius:3px;overflow:hidden;margin-top:4px}
.speed-bar-fill{height:100%;width:0;background:var(--white);border-radius:3px;transition:width 1.8s cubic-bezier(.4,0,.2,1)}
.speed-bar-fill.animated{width:85%}

/* ── SERVERS ── */
#servers{padding:80px 0;background:var(--white)}
.servers-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.server-card{border:2px solid var(--border);border-radius:var(--radius);padding:22px 20px;transition:border-color .2s,box-shadow .2s}
.server-card:hover{border-color:var(--blue);box-shadow:var(--shadow)}
.server-head{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.server-flag{font-size:1.4rem}
.server-head h3{font-size:.95rem;font-weight:700}
.server-cities{font-size:.82rem;color:var(--text-muted);margin-bottom:10px}
.server-ping{display:inline-block;background:#e6f4ea;color:#1e7e34;font-size:.78rem;font-weight:700;padding:3px 10px;border-radius:20px}

/* ── PRICING ── */
#pricing{padding:80px 0;background:var(--bg)}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.pricing-card{background:var(--white);border:2px solid var(--border);border-radius:var(--radius);padding:32px 28px;position:relative;transition:box-shadow .2s}
.pricing-card.popular{border-color:var(--blue);box-shadow:0 8px 40px rgba(26,110,245,.15)}
.pricing-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--blue);color:var(--white);font-size:.75rem;font-weight:700;padding:4px 16px;border-radius:20px;white-space:nowrap}
.pricing-name{font-size:1.1rem;font-weight:700;margin-bottom:12px}
.pricing-price{font-size:2.8rem;font-weight:800;color:var(--blue);line-height:1}
.pricing-price sup{font-size:1.2rem;vertical-align:super;margin-right:2px}
.pricing-period{font-size:.85rem;color:var(--text-muted);margin-top:4px;margin-bottom:24px}
.pricing-period span{font-size:1.4rem;font-weight:700;color:var(--text)}
.pricing-features{margin-bottom:28px;display:flex;flex-direction:column;gap:10px}
.pricing-features li{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--text-muted)}
.pricing-features li svg{color:var(--blue);flex-shrink:0;width:16px;height:16px}
.pricing-card .btn{width:100%;text-align:center}

/* ── TESTIMONIALS ── */
#testimonials{padding:80px 0;background:var(--white)}
.testimonials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testimonial-card{background:var(--bg);border-radius:var(--radius);padding:28px}
.testimonial-quote{font-size:2rem;color:var(--blue);line-height:1;margin-bottom:10px}
.testimonial-text{font-size:.9rem;color:var(--text);line-height:1.7;margin-bottom:20px}
.testimonial-author{display:flex;align-items:center;gap:12px}
.testimonial-avatar{width:40px;height:40px;border-radius:50%;background:var(--blue);color:var(--white);font-weight:700;font-size:.9rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.testimonial-info strong{display:block;font-size:.88rem;font-weight:700}
.testimonial-info span{font-size:.8rem;color:var(--text-muted)}

/* ── FAQ ── */
#faq{padding:80px 0;background:var(--bg)}
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-btn{width:100%;display:flex;align-items:center;justify-content:space-between;padding:20px 24px;background:none;border:none;cursor:pointer;font-size:.95rem;font-weight:600;color:var(--text);text-align:left;gap:12px;transition:background .15s}
.faq-btn:hover{background:var(--bg)}
.faq-btn svg{flex-shrink:0;width:18px;height:18px;color:var(--text-muted);transition:transform .25s}
.faq-item.open .faq-btn svg{transform:rotate(45deg);color:var(--blue)}
.faq-body{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease}
.faq-item.open .faq-body{max-height:200px}
.faq-body p{padding:0 24px 20px;font-size:.88rem;color:var(--text-muted);line-height:1.7}

/* ── FOOTER ── */
#footer{background:#1a1a2e;color:rgba(255,255,255,.7);padding:24px 0;text-align:center}
.footer-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-copy{font-size:.83rem}
.footer-links{display:flex;gap:20px}
.footer-links a{font-size:.83rem;color:rgba(255,255,255,.5);transition:color .2s}
.footer-links a:hover{color:rgba(255,255,255,.9)}

/* ── RESPONSIVE ── */
@media(max-width:960px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .speed-inner{grid-template-columns:1fr;gap:36px}
  .pricing-grid{grid-template-columns:1fr;max-width:440px;margin:0 auto}
  .testimonials-grid{grid-template-columns:1fr}
  .servers-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .hero-title{font-size:2.2rem}
  .section-title h2{font-size:1.6rem}
  .nav-menu,.nav-cta{display:none}
  .nav-menu.open{display:flex;flex-direction:column;position:fixed;top:64px;left:0;right:0;background:var(--white);border-bottom:1px solid var(--border);padding:16px 20px;gap:4px;z-index:998}
  .nav-menu.open a{display:block;padding:10px 14px}
  .nav-cta.open{display:flex;flex-direction:column;padding:0 20px 16px;position:fixed;top:auto;left:0;right:0;background:var(--white);z-index:998}
  .nav-toggle{display:block}
  .features-grid{grid-template-columns:1fr;max-width:360px;margin:0 auto}
  .servers-grid{grid-template-columns:1fr}
  .speed-numbers{gap:24px}
  .footer-inner{flex-direction:column;text-align:center}
}
@media(max-width:400px){
  .hero-title{font-size:1.8rem}
  .hero-btns{flex-direction:column;align-items:center}
  .btn{width:100%;max-width:280px;justify-content:center}
}