/* SpeedCat (闪电猫) Design System */

:root {
    --bg-color: #050505;
    --card-bg: rgba(20, 20, 25, 0.7);
    --primary: #00d2ff;
    --primary-glow: rgba(0, 210, 255, 0.5);
    --secondary: #9d50bb;
    --text-main: #e0e0e0;
    --text-muted: #a0a0a0;
    --accent: #ff007a;
    --success: #00f260;
    --warning: #f7971e;
    --container-width: 1200px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Background Particles */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at center, #0a0a15 0%, #050505 100%);
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    text-decoration: none;
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 10px var(--primary));
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary);
}

/* Hero Section */
.hero {
    padding: 180px 0 100px;
    text-align: center;
    position: relative;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(to right, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow: 0 10px 20px rgba(0, 210, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0, 210, 255, 0.5);
}

.btn-outline {
    border: 2px solid rgba(255, 255, 255, 0.1);
    color: #fff;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
}

/* Node Status */
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
}

.node-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 80px;
}

.node-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 25px;
    text-align: center;
    backdrop-filter: blur(5px);
    transition: var(--transition);
}

.node-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    background: rgba(30, 30, 40, 0.8);
}

.flag { font-size: 2rem; display: block; margin-bottom: 10px; }
.node-name { font-weight: 700; margin-bottom: 5px; }
.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 5px;
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
}
.latency { font-family: monospace; color: var(--primary); }

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 100px;
}

.pricing-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    padding: 40px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.pricing-card.featured {
    border-color: var(--primary);
    background: rgba(0, 210, 255, 0.05);
}

.pricing-card.featured::before {
    content: 'RECOMMENDED';
    position: absolute;
    top: 20px;
    right: -35px;
    background: var(--primary);
    color: #000;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 5px 40px;
    transform: rotate(45deg);
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin: 20px 0;
}

.price span { font-size: 1rem; color: var(--text-muted); }

.features-list {
    list-style: none;
    margin-bottom: 30px;
    flex-grow: 1;
}

.features-list li {
    margin-bottom: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
}

.features-list li::before {
    content: '✓';
    color: var(--success);
}

/* Articles */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.article-card {
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-5px);
}

.article-thumb {
    width: 100%;
    height: 200px;
    background: linear-gradient(45deg, #1a1a2e, #16213e);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.article-content {
    padding: 30px;
}

.article-content h3 {
    margin-bottom: 15px;
    font-size: 1.25rem;
}

.article-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.read-more {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Footer */
footer {
    padding: 100px 0 50px;
    background: #000;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 20px;
    max-width: 300px;
}

.footer-links h4 { margin-bottom: 20px; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-muted); text-decoration: none; transition: var(--transition); }
.footer-links a:hover { color: #fff; }

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    padding-top: 50px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .nav-links { display: none; }
    .footer-grid { grid-template-columns: 1fr; }
}