@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&family=Space+Grotesk:wght@400;600;700&display=swap');

:root {
    /* Base Cockpit Theme (Dark by default as requested by aesthetic) */
    --bg-carbon: #08090D;
    --text-main: #f1f5f9;
    --text-muted: #8b949e;
    --accent-amber: #F59E0B;
    --accent-amber-hover: #d97706;
    --status-green: #10B981;
    --radar-grid: rgba(255, 255, 255, 0.06);
    --panel-bg: rgba(255, 255, 255, 0.03);
    --panel-border: rgba(255, 255, 255, 0.08);
    --header-bg: rgba(8, 9, 13, 0.85);
}

[data-theme="light"] {
    /* Daytime Cockpit (Light Mode) */
    --bg-carbon: #f0f2f5;
    --text-main: #08090D;
    --text-muted: #475569;
    --accent-amber: #d97706;
    --accent-amber-hover: #b45309;
    --status-green: #059669;
    --radar-grid: rgba(0, 0, 0, 0.06);
    --panel-bg: rgba(255, 255, 255, 0.8);
    --panel-border: rgba(0, 0, 0, 0.1);
    --header-bg: rgba(240, 242, 245, 0.85);
}

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

html {
    scroll-behavior: smooth; /* 点击锚点平滑过渡 */
}

body {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-carbon);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.4s ease, color 0.4s ease;
}

.mono {
    font-family: 'JetBrains Mono', monospace;
}

a {
    text-decoration: none;
    color: var(--text-main);
    transition: color 0.2s ease;
}

.amber-text { color: var(--accent-amber); }
.green-text { color: var(--status-green); }

/* Top Ticker (Flight Board) */
.top-ticker {
    background-color: var(--panel-bg);
    border-bottom: 1px solid var(--panel-border);
    font-size: 0.75rem;
    padding: 0.25rem 0;
    letter-spacing: 0.05em;
    color: var(--status-green);
}

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

.pulse-green {
    display: inline-block;
    width: 8px; height: 8px;
    background-color: var(--status-green);
    border-radius: 50%;
    margin-right: 6px;
    box-shadow: 0 0 8px var(--status-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

#ticker-text {
    transition: opacity 0.3s ease;
}

/* Header & Nav */
header {
    position: sticky;
    top: 0;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: var(--header-bg);
    border-bottom: 1px solid var(--panel-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    z-index: 100;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    font-weight: 600;
    font-size: 0.9rem;
}

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

.nav-highlight {
    color: var(--accent-amber) !important;
}

/* Theme Toggle (Sophisticated) */
.theme-toggle {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--accent-amber);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}
.theme-toggle:hover {
    background: var(--radar-grid);
    transform: scale(1.05);
}

.sun-icon { display: block; }
.moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.btn-amber {
    background-color: var(--accent-amber);
    color: #08090D;
}
.btn-amber:hover {
    background-color: var(--accent-amber-hover);
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.4);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--panel-border);
    color: var(--text-main);
}
.btn-outline:hover {
    border-color: var(--text-main);
    background-color: var(--panel-bg);
}

.btn-full { width: 100%; }
.btn-large { padding: 1rem 2rem; font-size: 1rem; }

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section { padding: 5rem 0; }
.bg-panel { background-color: rgba(0,0,0,0.2); }
[data-theme="light"] .bg-panel { background-color: rgba(0,0,0,0.02); }

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.grid { display: grid; gap: 2rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* Hero Section & Radar */
.hero {
    position: relative;
    padding: 8rem 1.5rem;
    text-align: center;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.radar-bg {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 800px; height: 800px;
    z-index: -1;
}

.radar-circle {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid var(--radar-grid);
}

.rc-1 { width: 100%; height: 100%; }
.rc-2 { width: 66%; height: 66%; }
.rc-3 { width: 33%; height: 33%; }

.radar-sweep {
    position: absolute;
    top: 50%; left: 50%;
    width: 50%; height: 50%;
    background: conic-gradient(from 0deg, transparent 70%, rgba(16, 185, 129, 0.15) 100%);
    transform-origin: 0% 0%;
    animation: radar-spin 4s linear infinite;
}

@keyframes radar-spin {
    to { transform: rotate(360deg); }
}

.pulse-node {
    position: absolute;
    width: 6px; height: 6px;
    background: var(--status-green);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--status-green);
    animation: blink 2s infinite alternate;
}

@keyframes blink {
    from { opacity: 0.2; }
    to { opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 1;
    background: radial-gradient(circle, var(--bg-carbon) 0%, transparent 100%);
    padding: 2rem;
}

.brand-title {
    font-size: 4rem;
    margin-bottom: 0.5rem;
    line-height: 1.1;
    letter-spacing: 2px;
}

.sub-headline {
    font-size: 1.5rem;
    color: var(--accent-amber);
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Protocol Selector */
.protocol-selector {
    display: inline-flex;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 4px;
    padding: 4px;
    margin-bottom: 1rem;
}

.proto-btn {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 2px;
}

.proto-btn.active {
    background: var(--panel-border);
    color: var(--accent-amber);
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.bento-card {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    padding: 2rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
}
.bento-card:hover {
    border-color: var(--accent-amber);
    transform: translateY(-3px);
}

.bento-large {
    grid-column: span 3;
}

.bento-card .icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.bento-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.bento-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.latency-stat {
    position: absolute;
    bottom: 1.5rem; left: 2rem;
    font-size: 0.75rem;
    color: var(--status-green);
    background: rgba(16, 185, 129, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
}

.bento-split {
    display: flex;
    gap: 2rem;
}
.split-left, .split-right { flex: 1; }

.service-list { list-style: none; color: var(--text-muted); font-size: 0.85rem;}
.service-list li { margin-bottom: 0.5rem; }

.continent-filter {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.continent-filter span { cursor: pointer; padding-bottom: 4px; }
.continent-filter span.active { color: var(--status-green); border-bottom: 1px solid var(--status-green); }

/* Pricing: Flight Ticket Style */
.ticket-card {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}
.ticket-card:hover {
    transform: translateY(-5px);
}

.ticket-card.popular {
    border-color: var(--accent-amber);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.1);
}

.ticket-main {
    padding: 2rem;
    flex-grow: 1;
    position: relative;
}

.ticket-header {
    font-size: 0.75rem;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.popular-badge {
    position: absolute;
    top: 1rem; right: 1rem;
    background: var(--accent-amber);
    color: #08090D;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 2px;
}

.ticket-main h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.price span {
    font-size: 1rem;
    font-weight: normal;
}

.price-alt {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0.5rem 0 1.5rem;
}

.pricing-features {
    list-style: none;
    font-size: 0.95rem;
}
.pricing-features li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-muted);
}
.pricing-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--status-green);
}

.ticket-tear {
    border-top: 2px dashed var(--panel-border);
    padding: 1.5rem 2rem;
    position: relative;
}
/* Barcode effect */
.barcode {
    height: 30px;
    margin-bottom: 1rem;
    background: repeating-linear-gradient(90deg, var(--text-muted), var(--text-muted) 2px, transparent 2px, transparent 4px, var(--text-muted) 4px, var(--text-muted) 5px, transparent 5px, transparent 8px);
    opacity: 0.3;
}

/* Reviews & FAQ */
.review-card {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    padding: 2rem;
    border-radius: 4px;
}
.review-card p {
    font-style: italic;
    margin: 1rem 0;
    color: var(--text-muted);
}
.reviewer { font-size: 0.85rem; }

.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 4px;
}
.faq-item h4 {
    margin-bottom: 0.5rem;
    color: var(--accent-amber);
}
.faq-item p { color: var(--text-muted); font-size: 0.95rem; }

/* CTA */
.cta-section {
    background: linear-gradient(to bottom, transparent, rgba(245, 158, 11, 0.05));
    border-top: 1px solid var(--panel-border);
}

/* Footer */
footer {
    background-color: #000;
    border-top: 1px solid var(--panel-border);
    padding: 3rem 0;
    text-align: center;
}
[data-theme="light"] footer { background-color: var(--bg-carbon); }

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    font-size: 0.85rem;
}
.footer-links a { color: var(--text-muted); }
.footer-links a:hover { color: var(--text-main); }
.copyright { color: var(--text-muted); font-size: 0.75rem; }

/* Subpages Basic Styles */
.page-header {
    padding: 4rem 1.5rem;
    text-align: center;
    background-color: var(--panel-bg);
    border-bottom: 1px solid var(--panel-border);
}
.page-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
}
.page-content h2 { color: var(--accent-amber); margin: 2rem 0 1rem; }
.page-content p { color: var(--text-muted); margin-bottom: 1.5rem; }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .grid-3 { grid-template-columns: 1fr; }
    .bento-grid { grid-template-columns: 1fr; }
    .bento-large { grid-column: span 1; }
    .bento-split { flex-direction: column; gap: 1rem; }
    .brand-title { font-size: 2.5rem; }
    .hero-actions { flex-direction: column; }
    .radar-container { display: none; } /* Hide heavy radar on mobile */
}