/* Web3 / SaaS Metaverse Time-Travel Theme */
:root {
    --primary-color: #0096FF; /* 机器猫蓝 */
    --primary-hover: #007acc;
    --accent-pink: #FF4D85; /* 任意门粉红 */
    --bg-dark: #0B1021; /* 深空蓝背景 */
    --bg-light-dark: rgba(255, 255, 255, 0.02); /* 辅助暗色 */
    --text-main: #E2E8F0;
    --text-muted: #94A3B8;
    --border-color: rgba(0, 150, 255, 0.3);
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --glow-blue: 0 0 15px rgba(0, 150, 255, 0.5);
    --glow-pink: 0 0 20px rgba(255, 77, 133, 0.6);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-dark);
    overflow-x: hidden;
}

/* Warp Speed Background Effect */
.warp-speed {
    position: fixed;
    top: 50%; left: 50%; width: 200vw; height: 200vh;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, transparent 20%, var(--bg-dark) 80%),
                repeating-conic-gradient(from 0deg, var(--bg-dark) 0deg 10deg, rgba(0,150,255,0.06) 10deg 11deg);
    z-index: -1;
    animation: warpRotate 60s linear infinite;
}
@keyframes warpRotate {
    0% { transform: translate(-50%, -50%) rotate(0deg) scale(1); }
    50% { transform: translate(-50%, -50%) rotate(180deg) scale(1.2); }
    100% { transform: translate(-50%, -50%) rotate(360deg) scale(1); }
}

a { text-decoration: none; color: var(--primary-color); transition: var(--transition); }
a:hover { text-shadow: var(--glow-blue); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.highlight-pink { color: var(--accent-pink); text-shadow: var(--glow-pink); }
.bg-light-dark { background-color: var(--bg-light-dark); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); backdrop-filter: blur(5px);}

/* Node Board Marquee */
.node-marquee {
    width: 100%;
    background: rgba(0, 150, 255, 0.1);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    overflow: hidden;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 0.95rem;
    box-shadow: 0 0 10px rgba(0,150,255,0.2) inset;
    backdrop-filter: blur(10px);
}
.node-track {
    display: flex;
    white-space: nowrap;
    animation: marquee 25s linear infinite;
    width: max-content;
}
.node-track span { margin-right: 50px; text-shadow: 0 0 8px var(--primary-color); }
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    font-weight: bold; text-align: center; cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase; letter-spacing: 1px;
}
.btn-primary {
    background-color: rgba(0, 150, 255, 0.1);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: var(--glow-blue);
}
.btn-primary:hover {
    background-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 0 25px var(--primary-color);
}
.btn-large { padding: 15px 40px; font-size: 1.1rem; }
.btn-block { display: block; width: 100%; }

/* Header */
header {
    background: rgba(11, 16, 33, 0.85);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 100;
}
.header-container {
    display: flex; justify-content: space-between; align-items: center; height: 75px;
}
.logo { font-size: 1.6rem; font-weight: 800; color: var(--primary-color); text-shadow: var(--glow-blue); }
header nav a { margin: 0 15px; color: var(--text-main); font-weight: 500; }
header nav a:hover { color: var(--accent-pink); text-shadow: var(--glow-pink); }

/* Hero Section */
.hero { padding: 80px 0; }
.hero-grid { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.hero-text { flex: 1; z-index: 2; }
.hero-text h1 { font-size: 3.5rem; margin-bottom: 25px; line-height: 1.3; color: #fff;}
.hero-text p { font-size: 1.25rem; color: var(--text-muted); margin-bottom: 35px; line-height: 1.8;}
.hero-svg { flex: 1; display: flex; justify-content: center; }
.anywhere-door { width: 100%; max-width: 480px; animation: floatDoor 5s ease-in-out infinite; }
@keyframes floatDoor {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-18px); }
}

/* Sections & Grids */
.section { padding: 90px 0; }
.section-title { text-align: center; font-size: 2.4rem; margin-bottom: 60px; color: #fff; text-shadow: var(--glow-blue); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 35px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 35px; }

/* Cards */
.card, .review-card {
    background: rgba(11, 16, 33, 0.6);
    padding: 35px; border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 20px rgba(0,0,0,0.4);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}
.card:hover { transform: translateY(-8px); box-shadow: var(--glow-blue); border-color: var(--primary-color); }
.card .icon { font-size: 3.5rem; margin-bottom: 25px; text-shadow: var(--glow-blue); }
.card h3 { margin-bottom: 15px; font-size: 1.5rem; color: var(--primary-color); text-shadow: var(--glow-blue);}
.card p { color: var(--text-muted); line-height: 1.7;}

/* 3D Pricing Carousel (Keeping .grid-3 class but overriding via context) */
.carousel-container { perspective: 1200px; padding: 40px 0; }
.pricing-3d {
    display: flex; justify-content: center; align-items: center;
    position: relative; height: 500px; transform-style: preserve-3d;
    animation: rotateCarousel 20s infinite linear;
}
.pricing-3d:hover { animation-play-state: paused; }
@keyframes rotateCarousel { from { transform: rotateY(0deg); } to { transform: rotateY(360deg); } }

/* Using CSS variables to position them circularly */
.price-card {
    position: absolute; width: 340px;
    background: rgba(11, 16, 33, 0.95);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius); padding: 40px 30px; text-align: center;
    box-shadow: 0 0 30px rgba(0, 150, 255, 0.15) inset;
    transform: rotateY(var(--rotation)) translateZ(380px);
    transition: var(--transition); backdrop-filter: blur(12px);
}
.price-card h3 { color: var(--primary-color); font-size: 1.6rem; margin-bottom: 15px; text-shadow: var(--glow-blue);}
.price-card .price { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 30px; }
.price-card .price span { font-size: 3.2rem; font-weight: 800; color: #fff; text-shadow: var(--glow-blue); }
.price-card ul { list-style: none; margin-bottom: 35px; text-align: left; }
.price-card ul li { padding: 12px 0; border-bottom: 1px dashed rgba(0, 150, 255, 0.2); color: var(--text-muted); position: relative; padding-left: 20px;}
.price-card ul li::before { content: '>'; position: absolute; left: 0; color: var(--primary-color); font-weight: bold; text-shadow: var(--glow-blue);}

.price-card.popular { border-color: var(--accent-pink); box-shadow: 0 0 30px rgba(255, 77, 133, 0.2) inset, var(--glow-pink); }
.price-card.popular h3 { color: var(--accent-pink); text-shadow: var(--glow-pink); }
.price-card.popular .price span { text-shadow: var(--glow-pink); }
.price-card.popular ul li::before { color: var(--accent-pink); text-shadow: var(--glow-pink);}
.price-card.popular .btn-primary { border-color: var(--accent-pink); color: var(--accent-pink); box-shadow: var(--glow-pink); background: rgba(255, 77, 133, 0.1);}
.price-card.popular .btn-primary:hover { background: var(--accent-pink); color: #fff; }

.badge {
    position: absolute; top: -16px; left: 50%; transform: translateX(-50%);
    background: var(--accent-pink); color: white; padding: 6px 20px;
    border-radius: 20px; font-size: 0.9rem; font-weight: bold; box-shadow: var(--glow-pink);
    border: 1px solid rgba(255,255,255,0.3);
}

/* Reviews Marquee */
.reviews-marquee-container { width: 100%; overflow: hidden; position: relative; }
.reviews-marquee-container::before, .reviews-marquee-container::after {
    content: ''; position: absolute; top: 0; width: 150px; height: 100%; z-index: 2; pointer-events: none;
}
.reviews-marquee-container::before { left: 0; background: linear-gradient(to right, var(--bg-dark), transparent); }
.reviews-marquee-container::after { right: 0; background: linear-gradient(to left, var(--bg-dark), transparent); }
.reviews-track {
    display: flex; gap: 40px;
    animation: scrollReviews 30s linear infinite;
    width: max-content; padding: 20px 0;
}
@keyframes scrollReviews { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
.review-card { width: 380px; flex-shrink: 0; }
.review-card .stars { color: var(--accent-pink); font-size: 1.4rem; margin-bottom: 15px; text-shadow: var(--glow-pink); }
.review-card p { font-style: italic; margin-bottom: 25px; color: var(--text-muted); line-height: 1.7;}
.review-card .user { font-weight: 600; color: var(--primary-color); letter-spacing: 1px;}

/* Accordion FAQ */
.faq-list { max-width: 850px; margin: 0 auto; }
.faq-item {
    margin-bottom: 25px; background: rgba(11, 16, 33, 0.8);
    border: 1px solid var(--border-color); border-radius: var(--border-radius);
    padding: 20px 30px; transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    backdrop-filter: blur(5px);
}
.faq-item:hover { box-shadow: var(--glow-blue); }
.faq-item summary {
    list-style: none; cursor: pointer; outline: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item h4 { display: inline-block; font-size: 1.2rem; color: var(--primary-color); transition: var(--transition); margin: 0;}
.faq-item[open] h4 { color: var(--accent-pink); text-shadow: var(--glow-pink); }
.faq-item p { margin-top: 15px; color: var(--text-muted); padding-top: 20px; border-top: 1px dashed rgba(0, 150, 255, 0.3); line-height: 1.7;}

/* Footer */
footer { background: #050811; padding: 50px 0; text-align: center; border-top: 1px solid rgba(0, 150, 255, 0.2); }
.footer-links { margin-bottom: 25px; }
.footer-links a { color: var(--text-muted); margin: 0 15px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px;}
.footer-links a:hover { color: var(--primary-color); text-shadow: var(--glow-blue); }
.copyright { color: #475569; font-size: 0.95rem; }

/* Responsive Adjustments */
@media (max-width: 1024px) {
    .hero-grid { flex-direction: column; text-align: center; padding-top: 40px;}
    .hero-text h1 { font-size: 2.8rem; }
    .pricing-3d { animation: none; transform: none; flex-direction: column; height: auto; gap: 40px;}
    .price-card { position: relative; transform: none !important; width: 100%; max-width: 400px; margin: 0 auto;}
}
@media (max-width: 768px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .header-container { flex-direction: column; height: auto; padding: 20px 0; gap: 15px;}
    .hero-text h1 { font-size: 2.4rem; }
    .node-marquee { font-size: 0.85rem; }
}


/* Content Pages (About, Terms, Privacy) */
.content-page {
    background: rgba(11, 16, 33, 0.75);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 50px 60px;
    margin: 60px auto;
    max-width: 900px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5), 0 0 20px rgba(0, 150, 255, 0.1) inset;
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 2;
}
.content-page h1 {
    color: #fff;
    font-size: 2.5rem;
    margin-bottom: 40px;
    text-align: center;
    text-shadow: var(--glow-blue);
    border-bottom: 2px dashed rgba(0, 150, 255, 0.3);
    padding-bottom: 20px;
}
.content-page h2 {
    color: var(--accent-pink);
    font-size: 1.5rem;
    margin-top: 40px;
    margin-bottom: 20px;
    text-shadow: var(--glow-pink);
}
.content-page p, .content-page ul {
    color: var(--text-main);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 20px;
}
.content-page ul {
    margin-left: 20px;
}
.content-page li {
    margin-bottom: 10px;
}
@media (max-width: 768px) {
    .content-page { padding: 30px 20px; margin: 30px 15px; }
}

/* Accessibility: Skip Link */
.skip-link {
    position: absolute;
    top: -60px;
    left: 0;
    background: var(--accent-pink);
    color: white;
    padding: 10px 20px;
    z-index: 9999;
    font-weight: bold;
    transition: top 0.3s;
    border-bottom-right-radius: 8px;
}
.skip-link:focus {
    top: 0;
}

/* Fix sticky header overlap */
section, .sitemap-container, .content-page, [id] {
    scroll-margin-top: 100px;
}