/* Base Styles & Variables */
:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --bg-color: #0a192f;
    --text-color: #e6f1ff;
    --text-muted: #8892b0;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(10, 25, 47, 0.7);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: '楷体', 'KaiTi', 'STKaiti', serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    font-weight: bold;
    background: linear-gradient(to right, #64ffda, #007bff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.center-text {
    text-align: center;
}

/* Background Animation (Simulating Image 2) */
.bg-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    /* You can set the actual background image here */
    background-image: url('../images/bg.jpg');
    background-size: cover;
    background-position: center;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: normal;
    letter-spacing: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 30px;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

.btn-primary:hover {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.5);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: #fff;
    transform: translateY(-2px);
}

.btn-large {
    padding: 15px 40px;
    font-size: 1.2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
    padding: 20px 0;
}

.navbar.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    padding: 10px 0;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    letter-spacing: 2px;
    background: linear-gradient(to right, #fff, #64ffda);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links li a {
    font-size: 1.1rem;
    position: relative;
}

.nav-links li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links li a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.hero .subtitle {
    font-size: 1.5rem;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto 40px;
    text-shadow: 0 2px 5px rgba(0,0,0,0.5);
}

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

/* Grid System */
.grid {
    display: grid;
    gap: 30px;
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Cards (Glassmorphism) */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 40px 30px;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-10px);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

/* Features */
.feature-card {
    text-align: center;
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #fff;
}

/* Pricing Grid */
.pricing-card {
    text-align: center;
    position: relative;
    overflow: hidden;
}

.pricing-card.popular {
    border-color: var(--primary-color);
    transform: scale(1.05);
    background: rgba(0, 123, 255, 0.1);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-10px);
}

.badge {
    position: absolute;
    top: 20px;
    right: -35px;
    background: var(--primary-color);
    color: #fff;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 0.9rem;
    font-weight: bold;
}

.pricing-header h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.price {
    font-size: 3.5rem;
    font-weight: bold;
    color: #fff;
    margin-bottom: 30px;
}

.currency {
    font-size: 1.5rem;
    vertical-align: super;
}

.period {
    font-size: 1.2rem;
    color: var(--text-muted);
}

.pricing-features {
    text-align: left;
    margin-bottom: 40px;
}

.pricing-features li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    position: relative;
    padding-left: 30px;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #64ffda;
    font-weight: bold;
}

/* Nodes */
.nodes-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 40px;
}

.nodes-list span {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 10px 20px;
    border-radius: 20px;
    transition: var(--transition);
}

.nodes-list span:hover {
    background: rgba(255,255,255,0.1);
    transform: scale(1.1);
}

/* Detailed Nodes Table */
.nodes-table-container {
    width: 100%;
    overflow-x: auto;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
}

.nodes-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    min-width: 800px;
}

.nodes-table tr {
    border-bottom: 1px solid var(--card-border);
    transition: var(--transition);
}

.nodes-table tr:last-child {
    border-bottom: none;
}

.nodes-table tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

.nodes-table td {
    padding: 18px 15px;
    vertical-align: middle;
}

.node-name {
    font-size: 1.1rem;
    color: #fff;
    font-weight: 500;
}

.node-name strong {
    font-weight: bold;
    margin-right: 5px;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(76, 175, 80, 0.15);
    color: #4CAF50;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: bold;
}

.status-badge .dot {
    width: 8px;
    height: 8px;
    background-color: #4CAF50;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
    box-shadow: 0 0 8px #4CAF50;
}

.node-protocol {
    color: var(--text-muted);
}

.node-multiplier {
    color: #fff;
}

.node-ping {
    color: #4CAF50;
    font-weight: bold;
}

/* Articles */
.article-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    line-height: 1.4;
}

.article-card h3 a {
    color: #fff;
}

.article-card h3 a:hover {
    color: var(--primary-color);
}

.article-card p {
    color: var(--text-muted);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.read-more {
    color: #64ffda;
    font-weight: bold;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    margin-bottom: 20px;
    padding: 20px;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: rgba(255,255,255,0.3);
}

.faq-question {
    font-size: 1.2rem;
    color: #fff;
    margin-bottom: 10px;
}

.faq-answer {
    color: var(--text-muted);
}

/* Footer */
.footer {
    background: #020c1b;
    padding: 40px 0;
    text-align: center;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.footer-links {
    display: flex;
    gap: 20px;
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 2.5rem; }
    .hero .subtitle { font-size: 1.1rem; }
    .hero-actions { flex-direction: column; }
    .pricing-card.popular { transform: scale(1); }
    .pricing-card.popular:hover { transform: translateY(-10px); }
    .footer-bottom { flex-direction: column; gap: 20px; }
}