/* Base Web3 / SaaS Dark Mode */
:root {
    --primary-color: #FFC107; /* Bright Yellow */
    --primary-hover: #e0a800;
    --dark-gold: #b38f00;
    --text-color: #e0e0e0;
    --text-muted: #888;
    --bg-main: #000000;
    --bg-light: transparent;
    --white: #ffffff;
    --border-color: rgba(255, 255, 255, 0.08);
    --card-bg: rgba(20, 20, 20, 0.4);
}

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

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

/* Spotlight Effect */
.spotlight {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    pointer-events: none;
    background: radial-gradient(circle 600px at var(--x, 50%) var(--y, 50%), rgba(255, 193, 7, 0.06), transparent 40%);
    z-index: 9999;
    mix-blend-mode: screen;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.bg-light {
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 3rem;
    color: var(--white);
    font-weight: 600;
    letter-spacing: 1px;
}

/* Buttons */
.btn-primary, .btn-large {
    display: inline-block;
    background-color: transparent;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
    border: 1px solid var(--primary-color);
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    backdrop-filter: blur(5px);
}

.btn-primary:hover, .btn-large:hover {
    background-color: var(--primary-color);
    color: var(--bg-main);
    box-shadow: 0 0 20px rgba(255, 193, 7, 0.3);
    transform: translateY(-2px);
}

.btn-primary {
    padding: 10px 24px;
    font-size: 0.95rem;
}

.btn-large {
    padding: 16px 45px;
    font-size: 1.1rem;
    margin-top: 30px;
}

.btn-highlight {
    background-color: var(--primary-color);
    color: var(--bg-main);
}
.btn-highlight:hover {
    background-color: var(--white);
    color: var(--bg-main);
    border-color: var(--white);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

/* Header */
.header {
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: -0.5px;
}
.logo span {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 35px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.4s ease;
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: 120px 20px 100px;
    position: relative;
    overflow: hidden;
}

/* Abstract SVG Flow */
.hero-svg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    z-index: 0;
    opacity: 0.8;
    pointer-events: none;
}
.hero-svg path {
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    animation: flow 4s ease-out forwards;
}

@keyframes flow {
    to { stroke-dashoffset: 0; }
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 25px;
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
    letter-spacing: -1px;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

/* Node Marquee */
.node-marquee-wrapper {
    overflow: hidden;
    background: var(--bg-light);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    white-space: nowrap;
}
.node-marquee {
    display: inline-block;
    animation: marquee 30s linear infinite;
}
.node-marquee span {
    display: inline-flex;
    align-items: center;
    color: #666;
    margin-right: 50px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.85rem;
}
.dot {
    width: 6px;
    height: 6px;
    background-color: #00e676;
    border-radius: 50%;
    margin-right: 10px;
    box-shadow: 0 0 10px #00e676;
}
@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* Grids */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

/* Sections */
section {
    padding: 100px 0;
}

/* Cards (Advantages, AI, Reviews) */
.card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.5s;
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 193, 7, 0.3);
}

.card h3 {
    margin-bottom: 15px;
    color: var(--white);
    font-size: 1.25rem;
    font-weight: 600;
}
.card p {
    color: var(--text-muted);
}

/* Pricing - 3D Carousel Feel */
.pricing .grid-3 {
    perspective: 1200px;
}

.price-card {
    background: var(--card-bg);
    padding: 50px 35px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    transform-style: preserve-3d;
}

.price-card:hover {
    transform: rotateY(5deg) rotateX(5deg) scale(1.03) translateZ(15px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 20px rgba(255, 193, 7, 0.1);
}

.price-card.highlight {
    border: 1px solid rgba(255, 193, 7, 0.5);
    background: linear-gradient(180deg, rgba(255,193,7,0.05) 0%, rgba(0,0,0,0) 100%);
    position: relative;
}

.price-card.highlight::before {
    content: '首选推荐';
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--bg-main);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.price-card h3 {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 25px;
}

.price span {
    font-size: 1rem;
    color: #666;
    font-weight: normal;
}

.price-card ul {
    list-style: none;
    margin-bottom: 40px;
    text-align: left;
}

.price-card ul li {
    margin-bottom: 15px;
    color: var(--text-muted);
    padding-left: 25px;
    position: relative;
    font-size: 0.95rem;
}

.price-card ul li::before {
    content: '—';
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.price-card .btn-primary {
    display: block;
    width: 100%;
}

/* Reviews */
.review-card {
    border: none;
    background: linear-gradient(180deg, var(--card-bg) 0%, transparent 100%);
}
.review-card p {
    font-style: italic;
    color: #aaa;
    line-height: 1.7;
}
.review-card .author {
    margin-top: 25px;
    font-style: normal;
    font-weight: 500;
    color: var(--white);
    text-align: right;
    font-size: 0.9rem;
}

/* FAQ */
.faq-list {
    max-width: 750px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 0;
    padding: 25px 0;
    border-bottom: 1px solid var(--border-color);
    transition: padding 0.4s;
}

.faq-item:hover {
    padding-left: 10px;
    padding-right: 10px;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-item h4 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--white);
    font-weight: 500;
}

.faq-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    background: #000;
    color: #555;
    padding: 60px 0 40px;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-links {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-links a {
    color: #666;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.4s ease;
}

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

.copyright {
    font-size: 0.8rem;
    color: #444;
}

/* Tags / Small Cards */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 25px;
}
.tag {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    cursor: default;
}
.tag:hover {
    transform: translateY(-3px) scale(1.05);
    background: rgba(255, 255, 255, 0.08);
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.tag.netflix:hover { color: #E50914; border-color: rgba(229, 9, 20, 0.4); background: rgba(229, 9, 20, 0.1); }
.tag.disney:hover { color: #0063e5; border-color: rgba(0, 99, 229, 0.4); background: rgba(0, 99, 229, 0.1); }
.tag.hulu:hover { color: #1ce783; border-color: rgba(28, 231, 131, 0.4); background: rgba(28, 231, 131, 0.1); }
.tag.youtube:hover { color: #ff0000; border-color: rgba(255, 0, 0, 0.4); background: rgba(255, 0, 0, 0.1); }
.tag.chatgpt:hover { color: #10a37f; border-color: rgba(16, 163, 127, 0.4); background: rgba(16, 163, 127, 0.1); }
.tag.claude:hover { color: #d97757; border-color: rgba(217, 119, 87, 0.4); background: rgba(217, 119, 87, 0.1); }
.tag.midjourney:hover { color: #ffffff; border-color: rgba(255, 255, 255, 0.4); background: rgba(255, 255, 255, 0.1); }

/* HTML Pages Base Styles */
.page-content {
    padding: 60px 20px;
    max-width: 800px;
    margin: 0 auto;
    min-height: 70vh;
}
.page-content h2 {
    margin: 30px 0 15px;
    color: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    display: inline-block;
}
.page-content p, .page-content ul {
    margin-bottom: 15px;
    color: var(--text-muted);
}
.page-content ul {
    padding-left: 20px;
}
.page-content li {
    margin-bottom: 8px;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .grid-3, .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .nav {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-desc {
        font-size: 1rem;
    }
    
    .price-card:hover {
        transform: translateY(-5px);
    }
    
    .btn-primary, .btn-large {
        padding: 14px 24px;
    }
    
    section {
        padding: 60px 0;
    }
}

/* Accessibility & SEO Additions */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: #000;
    padding: 8px 16px;
    z-index: 10000;
    transition: top 0.3s;
    font-weight: bold;
    text-decoration: none;
}
.skip-link:focus {
    top: 0;
}

:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

section, article, .seo-article, h2, h3, [id] {
    scroll-margin-top: 100px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}
details.faq-item summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 8px;
    font-size: 1.05rem;
    outline: none;
}
details.faq-item div.faq-a {
    margin-top: 10px;
}