/* 快连 VPN 极光版 - Aurora Edition Style */
:root {
    --aurora-neon: #00FFA3;
    --aurora-cyan: #00D1FF;
    --aurora-purple: #BD00FF;
    --aurora-deep: #0A0A12;
    --aurora-text: #E0E0E6;
    --aurora-sub: #9494A3;
    --aurora-glass: rgba(20, 20, 35, 0.7);
    --font-main: 'Outfit', 'Noto Sans SC', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    color: var(--aurora-text);
    background-color: var(--aurora-deep);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Aurora Background */
.aurora-bg {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    overflow: hidden;
    background: #05050A;
}

.stars {
    position: absolute; width: 100%; height: 100%;
    background-image: radial-gradient(white 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.1;
}

.aurora-stream {
    position: absolute;
    width: 200%; height: 500px;
    filter: blur(100px);
    opacity: 0.2;
}
.s1 { top: -100px; left: -50%; background: linear-gradient(90deg, transparent, var(--aurora-neon), transparent); animation: streamFlow 15s infinite linear; }
.s2 { top: 20%; right: -50%; background: linear-gradient(90deg, transparent, var(--aurora-cyan), transparent); animation: streamFlow 20s infinite linear reverse; }
.s3 { bottom: -100px; left: -50%; background: linear-gradient(90deg, transparent, var(--aurora-purple), transparent); animation: streamFlow 18s infinite linear; }

@keyframes streamFlow { 0% { transform: translateX(-20%) skewY(-10deg); } 100% { transform: translateX(20%) skewY(-10deg); } }

.aurora-overlay {
    position: absolute; width: 100%; height: 100%;
    background: radial-gradient(circle at 50% 50%, transparent 0%, var(--aurora-deep) 100%);
}

/* Navigation */
.aurora-nav {
    height: 80px;
    position: sticky;
    top: 0;
    background: rgba(10, 10, 18, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 1000;
}

.nav-flex {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.aurora-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 800;
    color: white;
}
.aurora-logo span { font-size: 10px; color: var(--aurora-neon); letter-spacing: 2px; }
.logo-neon { width: 32px; height: 32px; }

.nav-links { display: flex; gap: 40px; align-items: center; }
.nav-item { text-decoration: none; color: var(--aurora-sub); font-size: 14px; font-weight: 500; transition: 0.3s; }
.nav-item:hover { color: var(--aurora-neon); }

.btn-aurora-nav {
    text-decoration: none;
    border: 1px solid var(--aurora-neon);
    color: var(--aurora-neon);
    padding: 8px 24px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 700;
    transition: 0.3s;
}
.btn-aurora-nav:hover { background: var(--aurora-neon); color: var(--aurora-deep); box-shadow: 0 0 20px rgba(0, 255, 163, 0.4); }

/* Hero Section */
.aurora-hero { padding: 140px 0 100px; text-align: center; }

.hero-glow-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 255, 163, 0.1);
    color: var(--aurora-neon);
    border: 1px solid rgba(0, 255, 163, 0.2);
    border-radius: 4px;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 32px;
}

.hero-h1 {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 32px;
    letter-spacing: -2px;
}
.neon-text {
    background: linear-gradient(90deg, var(--aurora-neon), var(--aurora-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 255, 163, 0.3);
}

.hero-p {
    font-size: 20px;
    color: var(--aurora-sub);
    max-width: 700px;
    margin: 0 auto 56px;
}

.hero-actions { display: flex; flex-direction: column; align-items: center; gap: 40px; }
.btn-aurora-main {
    text-decoration: none;
    background: white;
    color: var(--aurora-deep);
    padding: 22px 64px;
    border-radius: 4px;
    font-size: 18px;
    font-weight: 800;
    transition: 0.3s;
}
.btn-aurora-main:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(255,255,255,0.1); }

.hero-stats { display: flex; gap: 60px; }
.hs-item strong { display: block; font-size: 32px; color: white; }
.hs-item span { font-size: 12px; color: var(--aurora-sub); text-transform: uppercase; letter-spacing: 1px; }

/* Engine Section */
.engine-sec { padding: 100px 0; }
.sec-label { font-size: 11px; font-weight: 800; color: var(--aurora-cyan); letter-spacing: 3px; margin-bottom: 16px; display: block; }
.sec-h2 { font-size: 40px; font-weight: 800; margin-bottom: 60px; letter-spacing: -1px; }

.engine-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.e-card {
    padding: 60px 40px;
    background: var(--aurora-glass);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    transition: 0.4s;
}
.e-card:hover { transform: translateY(-10px); border-color: var(--aurora-neon); background: rgba(20, 20, 35, 0.9); }
.e-icon { margin-bottom: 32px; }
.e-icon svg { width: 40px; height: 40px; color: var(--aurora-neon); filter: drop-shadow(0 0 8px rgba(0, 255, 163, 0.4)); }
.e-card h3 { font-size: 22px; margin-bottom: 16px; }

/* Speed Visualization */
.speed-viz-sec { padding: 80px 0; }
.viz-glass { 
    background: var(--aurora-glass); border: 1px solid rgba(255,255,255,0.05); 
    border-radius: 4px; padding: 60px; backdrop-filter: blur(40px);
}
.viz-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 48px; }
.viz-header h3 { font-size: 20px; font-weight: 800; color: white; }
.viz-badge { 
    font-size: 11px; font-weight: 800; color: var(--aurora-neon); 
    padding: 4px 12px; border: 1px solid var(--aurora-neon); border-radius: 2px;
}

.viz-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.viz-item { display: flex; flex-direction: column; gap: 16px; }
.v-label { display: flex; justify-content: space-between; font-size: 14px; font-weight: 600; }
.v-label strong { color: white; }
.v-bar { width: 100%; height: 4px; background: rgba(255,255,255,0.05); border-radius: 2px; overflow: hidden; }
.v-bar .fill { height: 100%; border-radius: 2px; transition: 1.5s cubic-bezier(0.19, 1, 0.22, 1); }

.neon-green { background: var(--aurora-neon); box-shadow: 0 0 15px var(--aurora-neon); }
.neon-blue { background: var(--aurora-cyan); box-shadow: 0 0 15px var(--aurora-cyan); }
.neon-purple { background: var(--aurora-purple); box-shadow: 0 0 15px var(--aurora-purple); }
.neon-cyan { background: #00DFD8; box-shadow: 0 0 15px #00DFD8; }

/* Transit Section */
.transit-sec { padding: 120px 0; background: rgba(0,0,0,0.2); }
.transit-layout { display: flex; align-items: center; gap: 80px; }
.transit-visual { flex: 1.2; }
.star-map {
    height: 400px; background: rgba(255,255,255,0.02); border-radius: 4px;
    position: relative; overflow: hidden;
}
.node {
    position: absolute; width: 8px; height: 8px; background: var(--aurora-neon);
    border-radius: 50%; box-shadow: 0 0 15px var(--aurora-neon);
}
.n1 { top: 20%; left: 30%; }
.n2 { top: 50%; left: 60%; }
.n3 { top: 80%; left: 20%; }
.n4 { top: 30%; left: 80%; }

.data-pulse {
    position: absolute; width: 4px; height: 4px; background: var(--aurora-neon);
    border-radius: 50%; filter: blur(2px);
}
.p1 { top: 20%; left: 30%; animation: pulseData 3s infinite; }
.p2 { top: 50%; left: 60%; animation: pulseData 4s infinite 1s; }

@keyframes pulseData { 
    0% { transform: scale(1); opacity: 1; } 
    100% { transform: scale(10); opacity: 0; } 
}

.transit-text { flex: 1; }
.transit-features { display: flex; gap: 40px; margin-top: 48px; }
.tf-num { font-size: 32px; font-weight: 900; color: white; margin-bottom: 4px; font-family: 'Outfit'; }
.tf-item p { font-size: 12px; color: var(--aurora-sub); text-transform: uppercase; letter-spacing: 1px; }

/* Security Section */
.security-sec { padding: 120px 0; }
.security-glass {
    padding: 100px 80px; background: linear-gradient(135deg, rgba(255,255,255,0.03), transparent);
    border: 1px solid rgba(255,255,255,0.05); border-radius: 4px;
    display: flex; align-items: center; gap: 80px;
}
.sg-content { flex: 1.2; }
.sg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 48px; }
.sg-box h4 { font-size: 18px; margin-bottom: 12px; color: white; }
.sg-box p { font-size: 14px; color: var(--aurora-sub); }

.sg-visual { flex: 0.8; display: flex; justify-content: center; }
.neon-shield {
    width: 240px; height: 240px; position: relative;
    display: flex; align-items: center; justify-content: center;
}
.shield-ring {
    position: absolute; width: 100%; height: 100%;
    border: 2px dashed var(--aurora-purple); border-radius: 50%;
    animation: rotate 15s infinite linear;
}
.shield-glow {
    position: absolute; width: 120%; height: 120%;
    background: radial-gradient(circle, var(--aurora-neon), transparent);
    opacity: 0.05; filter: blur(40px);
}
.shield-core {
    width: 100px; height: 100px; background: var(--aurora-cyan);
    filter: blur(40px); opacity: 0.2;
}

/* Experience Stats */
.experience-sec { padding: 80px 0; border-top: 1px solid rgba(255,255,255,0.05); border-bottom: 1px solid rgba(255,255,255,0.05); }
.exp-grid { display: flex; justify-content: space-around; text-align: center; }
.exp-item h3 { font-size: 48px; font-weight: 900; color: white; margin-bottom: 8px; font-family: 'Outfit'; }
.exp-item p { font-size: 14px; color: var(--aurora-sub); text-transform: uppercase; letter-spacing: 2px; }

/* Pricing Section */
.pricing-sec { padding: 120px 0; }
.sec-head-center { text-align: center; margin-bottom: 80px; }
.aurora-pricing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.ap-card {
    padding: 60px 40px; background: var(--aurora-glass);
    border: 1px solid rgba(255, 255, 255, 0.05); border-radius: 4px;
    text-align: center; transition: 0.4s; display: flex; flex-direction: column;
}
.ap-card:hover { border-color: var(--aurora-cyan); transform: translateY(-10px); }
.ap-card.active { border-color: var(--aurora-neon); position: relative; background: rgba(20, 20, 35, 0.9); }
.ap-badge {
    position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
    background: var(--aurora-neon); color: var(--aurora-deep); padding: 4px 16px;
    font-size: 11px; font-weight: 800; border-radius: 2px;
}

.ap-name { font-size: 14px; font-weight: 700; color: var(--aurora-sub); text-transform: uppercase; margin-bottom: 32px; }
.ap-price { font-size: 56px; font-weight: 900; color: white; margin-bottom: 40px; }
.ap-price span { font-size: 18px; font-weight: 400; color: var(--aurora-sub); }

.ap-list { list-style: none; text-align: left; margin-bottom: 48px; flex-grow: 1; }
.ap-list li { margin-bottom: 16px; font-size: 14px; color: var(--aurora-sub); display: flex; gap: 12px; }
.ap-list li::before { content: '→'; color: var(--aurora-cyan); font-weight: 900; }

.btn-ap { display: block; padding: 18px; border: 1px solid rgba(255,255,255,0.1); text-decoration: none; color: white; font-weight: 700; transition: 0.3s; }
.btn-ap:hover { background: rgba(255,255,255,0.05); }
.btn-ap-main { display: block; padding: 18px; background: var(--aurora-neon); color: var(--aurora-deep); text-decoration: none; font-weight: 800; }

/* Footer */
.aurora-footer { padding: 100px 0 40px; border-top: 1px solid rgba(255,255,255,0.05); }
.ft-top { display: flex; justify-content: space-between; gap: 100px; margin-bottom: 80px; }
.ft-brand { flex: 1.5; }
.ft-brand p { font-size: 14px; color: var(--aurora-sub); margin-top: 24px; max-width: 320px; }
.ft-links { flex: 2; display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.ft-col h4 { font-size: 15px; margin-bottom: 24px; color: white; }
.ft-col a { display: block; text-decoration: none; color: var(--aurora-sub); font-size: 14px; margin-bottom: 12px; transition: 0.2s; }
.ft-col a:hover { color: var(--aurora-neon); }

.ft-bottom { padding-top: 40px; border-top: 1px solid rgba(255,255,255,0.05); display: flex; justify-content: space-between; font-size: 13px; color: var(--aurora-sub); }
.socials a { color: white; text-decoration: none; margin-left: 24px; font-weight: 700; }

/* Responsive */
@media (max-width: 1024px) {
    .network-layout, .security-glass, .ft-top { flex-direction: column; text-align: center; }
    .hero-h1 { font-size: 48px; }
    .engine-grid, .aurora-pricing, .ft-links { grid-template-columns: 1fr; }
    .hero-stats { justify-content: center; }
}