/* Acid Y2K & Retro-Pop Design System for 纵云梯机场官网 */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@600;800;900&family=Space+Grotesk:wght@500;700&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

:root {
    --bg-dark: #130B24;
    --bg-card: #1E103B;
    --bg-card-hover: #2B1652;
    --surface-lavender: #C4B5FD;
    --text-white: #FFFFFF;
    --text-dim: #D8B4FE;
    --text-muted: #9CA3AF;
    --acid-green: #A3E635;
    --acid-green-glow: rgba(163, 230, 53, 0.4);
    --cyber-pink: #F43F5E;
    --cyber-pink-glow: rgba(244, 63, 94, 0.4);
    --electric-purple: #4C1D95;
    --border-glow: #8B5CF6;
    --hologram-grad: linear-gradient(135deg, #F43F5E 0%, #A855F7 35%, #06B6D4 70%, #A3E635 100%);
    --chrome-grad: linear-gradient(135deg, #FFFFFF 0%, #94A3B8 20%, #E2E8F0 40%, #475569 60%, #CBD5E1 80%, #1E293B 100%);
}

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

html {
    scroll-behavior: smooth;
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-white);
    overflow-x: hidden;
}

body {
    background-color: var(--bg-dark);
    position: relative;
    min-height: 100vh;
}

/* Background Canvas */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
    opacity: 0.65;
}

/* Top Marquee Banner */
.top-marquee {
    background: var(--hologram-grad);
    color: #000;
    font-weight: 800;
    font-size: 0.88rem;
    padding: 8px 0;
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    z-index: 100;
    letter-spacing: 1px;
    text-transform: uppercase;
    box-shadow: 0 0 15px rgba(244, 63, 94, 0.5);
}

.marquee-content {
    display: inline-block;
    animation: marquee 22s linear infinite;
}

@keyframes marquee {
    0% { transform: translateX(0%); }
    100% { transform: translateX(-50%); }
}

.marquee-item {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    margin-right: 40px;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 90;
    background: rgba(19, 11, 36, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 2px solid var(--electric-purple);
    padding: 14px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.nav-logo img {
    width: 38px;
    height: 38px;
    filter: drop-shadow(0 0 8px var(--cyber-pink));
}

.logo-text {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: 900;
    background: var(--chrome-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 0 0 10px rgba(168, 85, 247, 0.5);
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    color: var(--surface-lavender);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 4px 8px;
    letter-spacing: 0.5px;
}

.nav-links a:hover {
    color: var(--acid-green);
    text-shadow: 0 0 10px var(--acid-green-glow);
    transform: translateY(-2px);
}

.btn-cta {
    background: var(--acid-green);
    color: #0b0716;
    font-weight: 900;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.95rem;
    padding: 10px 24px;
    border-radius: 4px;
    text-decoration: none;
    box-shadow: 4px 4px 0px #000, 0 0 15px var(--acid-green-glow);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 2px solid #000;
    cursor: pointer;
}

.btn-cta:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px #000, 0 0 25px var(--acid-green-glow);
    background: #b6f34c;
}

.btn-cta:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px #000;
}

.btn-pink {
    background: var(--cyber-pink);
    color: #fff;
    box-shadow: 4px 4px 0px #000, 0 0 15px var(--cyber-pink-glow);
}

.btn-pink:hover {
    background: #ff4d6d;
    box-shadow: 6px 6px 0px #000, 0 0 25px var(--cyber-pink-glow);
}

/* Page Container */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 10;
}

/* Y2K Retro Badges */
.badge-y2k {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(76, 29, 149, 0.6);
    border: 1.5px solid var(--border-glow);
    color: var(--acid-green);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    backdrop-filter: blur(8px);
    margin-bottom: 16px;
}

/* Hero Section */
.hero-section {
    padding: 80px 0 60px 0;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
}

.hero-content {
    transform: rotate(-2deg);
}

.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem;
    line-height: 1.1;
    font-weight: 900;
    margin-bottom: 20px;
    background: var(--chrome-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(196, 181, 253, 0.4);
    letter-spacing: -1px;
}

.hero-title span {
    color: var(--cyber-pink);
    -webkit-text-fill-color: var(--cyber-pink);
    display: block;
    text-shadow: 0 0 20px var(--cyber-pink-glow);
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--surface-lavender);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 580px;
    background: rgba(30, 16, 59, 0.7);
    padding: 16px;
    border-left: 4px solid var(--acid-green);
    border-radius: 0 8px 8px 0;
}

.hero-actions {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.sticker-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.sticker-tag {
    background: var(--bg-card);
    border: 1px dashed var(--border-glow);
    padding: 6px 12px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--surface-lavender);
    border-radius: 4px;
}

/* Hero 3D Interactive Viewer */
.hero-viewer {
    position: relative;
    width: 100%;
    height: 440px;
    background: rgba(30, 16, 59, 0.6);
    border: 2px solid var(--electric-purple);
    border-radius: 16px;
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.3), inset 0 0 20px rgba(76, 29, 149, 0.5);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

#canvas-3d {
    width: 100%;
    height: 100%;
    cursor: grab;
}

#canvas-3d:active {
    cursor: grabbing;
}

.viewer-overlay {
    position: absolute;
    bottom: 16px;
    left: 16px;
    right: 16px;
    display: flex;
    justify-content: space-between;
    pointer-events: none;
}

.viewer-tag {
    background: rgba(19, 11, 36, 0.85);
    border: 1px solid var(--acid-green);
    color: var(--acid-green);
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 4px;
    font-family: monospace;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.4rem;
    font-weight: 900;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.section-subtitle {
    color: var(--surface-lavender);
    font-size: 1.1rem;
}

/* Nodes Board Section */
.section-nodes {
    padding: 80px 0;
}

.nodes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.node-card {
    background: var(--bg-card);
    border: 2px solid var(--electric-purple);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.node-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.3);
}

.node-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.node-flag {
    font-size: 1.5rem;
}

.node-name {
    font-weight: 800;
    font-size: 1.1rem;
    color: #fff;
}

.node-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--acid-green);
    box-shadow: 0 0 10px var(--acid-green);
}

.node-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px dashed rgba(255,255,255,0.1);
}

.node-ping {
    font-family: monospace;
    font-weight: 700;
    color: var(--acid-green);
}

.nodes-control {
    text-align: center;
    margin-top: 20px;
}

/* Features Grid */
.section-features {
    padding: 80px 0;
    background: rgba(30, 16, 59, 0.4);
    border-y: 2px solid var(--electric-purple);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 2px solid var(--electric-purple);
    border-radius: 14px;
    padding: 30px;
    transition: all 0.3s ease;
    position: relative;
}

.feature-card:hover {
    border-color: var(--cyber-pink);
    transform: translateY(-5px);
    box-shadow: 0 0 25px rgba(244, 63, 94, 0.25);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: inline-block;
    filter: drop-shadow(0 0 10px var(--cyber-pink));
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: #fff;
}

.feature-card p {
    color: var(--surface-lavender);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Pricing Section */
.section-pricing {
    padding: 80px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.price-card {
    background: var(--bg-card);
    border: 2px solid var(--electric-purple);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.price-card.popular {
    border-color: var(--acid-green);
    background: #251448;
    box-shadow: 0 0 30px rgba(163, 230, 53, 0.25);
    transform: scale(1.04);
}

.popular-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--acid-green);
    color: #000;
    font-weight: 900;
    font-size: 0.75rem;
    padding: 4px 16px;
    border-radius: 20px;
    text-transform: uppercase;
}

.price-title {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: #fff;
}

.price-amount {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.6rem;
    font-weight: 900;
    color: var(--acid-green);
    margin: 16px 0;
}

.price-amount span {
    font-size: 0.9rem;
    color: var(--surface-lavender);
}

.price-features {
    list-style: none;
    margin: 20px 0 30px 0;
    text-align: left;
    flex: 1;
}

.price-features li {
    padding: 8px 0;
    color: var(--surface-lavender);
    font-size: 0.9rem;
    border-bottom: 1px dashed rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    gap: 8px;
}

.price-features li::before {
    content: "⚡";
    color: var(--cyber-pink);
}

/* Knowledge Base Grid */
.section-articles {
    padding: 80px 0;
    background: rgba(30, 16, 59, 0.4);
    border-top: 2px solid var(--electric-purple);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.article-card {
    background: var(--bg-card);
    border: 2px solid var(--electric-purple);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    border-color: var(--acid-green);
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(163, 230, 53, 0.2);
}

.article-tag {
    color: var(--cyber-pink);
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.article-card h3 {
    font-size: 1.15rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
    line-height: 1.4;
}

.article-card p {
    color: var(--surface-lavender);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
}

.article-link {
    color: var(--acid-green);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.2s ease;
}

.article-link:hover {
    gap: 10px;
}

/* Reviews Grid */
.section-reviews {
    padding: 80px 0;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.review-card {
    background: var(--bg-card);
    border: 1px solid var(--electric-purple);
    border-radius: 12px;
    padding: 24px;
}

.review-stars {
    color: #FBBF24;
    margin-bottom: 12px;
}

.review-text {
    color: var(--surface-lavender);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.review-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--hologram-grad);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    color: #000;
}

.user-info h4 {
    color: #fff;
    font-size: 0.95rem;
}

.user-info span {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* FAQ Accordion */
.section-faq {
    padding: 80px 0;
    background: rgba(30, 16, 59, 0.4);
    border-top: 2px solid var(--electric-purple);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-card);
    border: 1.5px solid var(--electric-purple);
    border-radius: 10px;
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    font-weight: 800;
    font-size: 1.05rem;
    color: #fff;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-question::after {
    content: "+";
    font-size: 1.4rem;
    color: var(--acid-green);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
    color: var(--cyber-pink);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 20px;
    color: var(--surface-lavender);
    line-height: 1.6;
    font-size: 0.95rem;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 20px 20px 20px;
}

/* Footer */
.footer {
    background: #0B0616;
    border-top: 2px solid var(--electric-purple);
    padding: 60px 0 30px 0;
    color: var(--surface-lavender);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    color: #fff;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 0.9rem;
    max-width: 360px;
    line-height: 1.6;
}

.footer-col h4 {
    color: #fff;
    margin-bottom: 16px;
    font-size: 1rem;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col a {
    color: var(--surface-lavender);
    text-decoration: none;
    font-size: 0.88rem;
    transition: color 0.2s ease;
}

.footer-col a:hover {
    color: var(--acid-green);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Article Detail Pages Styling */
.article-page {
    padding: 60px 0;
}

.article-header {
    margin-bottom: 40px;
    text-align: left;
}

.article-body {
    background: var(--bg-card);
    border: 2px solid var(--electric-purple);
    border-radius: 16px;
    padding: 40px;
    color: var(--surface-lavender);
    line-height: 1.8;
    font-size: 1.05rem;
}

.article-body h2 {
    color: #fff;
    margin: 30px 0 15px 0;
    font-size: 1.5rem;
    border-left: 4px solid var(--acid-green);
    padding-left: 12px;
}

.article-body h3 {
    color: var(--acid-green);
    margin: 24px 0 12px 0;
    font-size: 1.25rem;
}

.article-body p {
    margin-bottom: 18px;
}

.article-body ul, .article-body ol {
    margin: 16px 0 20px 24px;
}

.article-body li {
    margin-bottom: 8px;
}

.article-cta-box {
    margin: 40px 0 20px 0;
    padding: 30px;
    background: linear-gradient(135deg, rgba(76,29,149,0.8), rgba(30,16,59,0.9));
    border: 2px dashed var(--acid-green);
    border-radius: 12px;
    text-align: center;
}

.article-cta-box h3 {
    color: #fff;
    margin-bottom: 12px;
    font-size: 1.4rem;
}

/* Responsive */
@media (max-width: 900px) {
    .hero-section {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content {
        transform: rotate(0deg);
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-desc {
        margin: 0 auto 30px auto;
    }
    .navbar {
        padding: 14px 20px;
    }
    .nav-links {
        display: none;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}