/* Fastlink Custom CSS - Premium and Dynamic Blue/Cyan aesthetics */

:root {
    --primary: #00a8ff; /* Vibrant Blue for Fastlink */
    --primary-alt: #0097e6;
    --secondary: #00d2d3; /* Cyan */
    --accent: #48dbfb;
    --bg-dark: #0a1118;
    --bg-card: rgba(16, 25, 36, 0.8);
    --text-light: #f5f6fa;
    --text-dim: #a4b0be;
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-glow: rgba(0, 168, 255, 0.2);
}

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

body {
    font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.65;
    overflow-x: hidden;
}

/* Dynamic Background Atmosphere */
.bg-glow {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: radial-gradient(circle at 20% 40%, rgba(0, 168, 255, 0.08), transparent 50%),
                radial-gradient(circle at 80% 60%, rgba(0, 210, 211, 0.06), transparent 50%);
    z-index: -1;
}

.bg-particles {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
        radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        radial-gradient(rgba(0, 168, 255, 0.1) 1.5px, transparent 1.5px);
    background-size: 60px 60px, 120px 120px;
    background-position: 0 0, 0 0;
    animation: particleAnimation 120s linear infinite;
}

@keyframes particleAnimation {
    0% { background-position: 0 0, 0 0; }
    100% { background-position: 600px 600px, -600px 600px; }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 6%;
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 6%;
    position: sticky;
    top: 0;
    background: rgba(10, 17, 24, 0.9);
    backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 2px;
}

.logo a {
    font-size: 1.7rem;
    font-weight: 800;
    background: linear-gradient(90deg, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    margin-left: 2rem;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary);
    transform: translateY(-1px);
}

.nav-links .nav-cta {
    padding: 0.6rem 1.4rem;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    margin-left: 2.5rem;
    font-weight: 700;
    box-shadow: 0 4px 15px var(--glass-glow);
}

.nav-links .nav-cta:hover {
    background: var(--primary-alt);
    box-shadow: 0 6px 20px rgba(0, 168, 255, 0.3);
}

/* Hero Section */
.hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 4rem 6%;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    background: linear-gradient(135deg, #fff 60%, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
    font-weight: 900;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-dim);
    max-width: 800px;
    margin-bottom: 3rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

.cta-button {
    padding: 1rem 2.8rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.primary-btn {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 8px 25px rgba(0, 168, 255, 0.25);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 168, 255, 0.35);
}

.secondary-btn {
    background: rgba(255,255,255,0.03);
    color: #fff;
    border: 1px solid var(--glass-border);
}

.secondary-btn:hover {
    background: rgba(255,255,255,0.06);
    border-color: var(--primary);
}

/* Sections */
section {
    padding: 7rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.section-subtitle {
    color: var(--text-dim);
    font-size: 1.1rem;
}

/* Pricing Section Content specific style matching image */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: flex-start;
}

.pricing-card {
    background: #fff;
    border-radius: 24px;
    padding: 3rem 2rem;
    color: #333;
    text-align: center;
    transition: all 0.4s ease;
    border: 1px solid #eee;
    display: flex;
    flex-direction: column;
    min-height: 550px;
    position: relative;
}

.pricing-card.recommend {
    border: 2px solid #00adef;
    box-shadow: 0 15px 45px rgba(0, 173, 239, 0.15);
}

.recommend-badge {
    position: absolute;
    top: 20px;
    right: -10px;
    background: #00adef;
    color: #fff;
    padding: 6px 20px;
    transform: rotate(45deg);
    font-size: 0.85rem;
    font-weight: 800;
    width: 100px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.pricing-card h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: #222;
}

.price {
    font-size: 3.5rem;
    font-weight: 900;
    color: #00adef;
    margin-bottom: 2rem;
    display: flex;
    align-items: baseline;
    justify-content: center;
}

.price span { font-size: 1.5rem; margin-right: 8px; }
.price em { font-style: normal; font-size: 1.2rem; color: #666; font-weight: 500; }

.plan-features {
    list-style: none;
    text-align: left;
    margin-bottom: 3rem;
    flex-grow: 1;
}

.plan-features li {
    padding: 0.6rem 0;
    font-size: 0.95rem;
    color: #555;
    display: flex;
    align-items: center;
    gap: 10px;
}

.plan-features li i {
    color: #00adef;
    font-size: 1rem;
}

.price-btn {
    background: #00adef;
    color: #fff;
    border-radius: 12px;
    padding: 1.1rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s;
}

.price-btn:hover {
    background: #0096d2;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 173, 239, 0.3);
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    padding: 3rem 2rem;
    border-radius: 24px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
}

.feature-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: block;
}

/* Knowledge Base */
.kb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.kb-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 20px;
}

.kb-card h3 { margin-bottom: 1rem; }
.kb-card a { color: var(--accent); text-decoration: none; font-weight: 600; }

/* Footer */
footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--glass-border);
    background: rgba(0,0,0,0.2);
}

.footer-logo { font-size: 1.5rem; font-weight: 800; margin-bottom: 1rem; }
.copyright { text-align: center; color: var(--text-dim); font-size: 0.9rem; margin-top: 3rem; }

@media (max-width: 1024px) {
    .pricing-grid { grid-template-columns: 1fr; max-width: 450px; margin: 0 auto; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 2.5rem; }
}