/* 扬帆云机场 - Status-Driven Node Dashboard CSS Stylesheet */
:root {
    --bg-dark: #070b14;
    --bg-card: rgba(15, 23, 42, 0.75);
    --bg-card-hover: rgba(30, 41, 59, 0.85);
    --border-color: rgba(56, 189, 248, 0.15);
    --border-glow: rgba(56, 189, 248, 0.4);
    
    --primary-cyan: #00f2fe;
    --primary-blue: #3b82f6;
    --primary-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
    --accent-emerald: #10b981;
    --accent-purple: #8b5cf6;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    
    --font-mono: "JetBrains Mono", "Fira Code", Consolas, monospace;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    
    --shadow-neon: 0 0 25px rgba(0, 242, 254, 0.25);
    --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Background Canvas & Grid Overlay */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    pointer-events: none;
}

.cyber-grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        linear-gradient(rgba(56, 189, 248, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(56, 189, 248, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
}

/* Utility Containers & Typography */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 90px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 60px;
}

.tag-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.3);
    border-radius: 50px;
    color: var(--primary-cyan);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    text-transform: uppercase;
    font-family: var(--font-mono);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-emerald);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-emerald);
    animation: pulse 1.8s infinite;
}

.pulse-dot.warning {
    background-color: var(--accent-warning);
    box-shadow: 0 0 10px var(--accent-warning);
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1.1); box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: #ffffff;
    margin-bottom: 16px;
}

.section-title .gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 38px;
    height: 38px;
    background: var(--primary-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #070b14;
    font-weight: 900;
    font-size: 1.2rem;
    box-shadow: var(--shadow-neon);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 6px 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-cyan);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--primary-cyan);
    transition: var(--transition);
    border-radius: 2px;
}

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

.nav-cta {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #070b14;
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 242, 254, 0.5);
}

.btn-outline {
    background: rgba(15, 23, 42, 0.6);
    border-color: rgba(56, 189, 248, 0.4);
    color: var(--primary-cyan);
}

.btn-outline:hover {
    background: rgba(56, 189, 248, 0.15);
    border-color: var(--primary-cyan);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
}

/* Hero Dashboard Section */
.hero {
    padding-top: 150px;
    padding-bottom: 80px;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-badge-status {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 30px;
    font-size: 0.85rem;
    color: var(--accent-emerald);
    margin-bottom: 24px;
    font-family: var(--font-mono);
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    max-width: 560px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-stats-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 18px;
    backdrop-filter: blur(12px);
}

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

.stat-val {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary-cyan);
}

.stat-lbl {
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 2px;
}

/* Live Terminal Card in Hero */
.terminal-card {
    background: rgba(10, 15, 26, 0.9);
    border: 1px solid var(--border-glow);
    border-radius: 14px;
    box-shadow: var(--shadow-neon);
    overflow: hidden;
    backdrop-filter: blur(20px);
}

.terminal-header {
    background: rgba(15, 23, 42, 0.95);
    padding: 12px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.terminal-body {
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #e2e8f0;
    max-height: 380px;
    overflow-y: auto;
}

.terminal-line {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.terminal-time { color: var(--text-dim); }
.terminal-host { color: var(--primary-cyan); }
.terminal-ping { color: var(--accent-emerald); font-weight: bold; }
.terminal-status { color: #38bdf8; }

/* Status & Monitoring Radar Section */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    margin-bottom: 36px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    backdrop-filter: blur(16px);
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(56, 189, 248, 0.35);
    box-shadow: var(--shadow-card);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.status-table th,
.status-table td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.status-table th {
    color: var(--text-dim);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.node-flag {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.latency-bar-wrap {
    width: 100px;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    overflow: hidden;
}

.latency-bar-fill {
    height: 100%;
    background: var(--accent-emerald);
    border-radius: 4px;
}

.status-badge-online {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-emerald);
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

/* Radar & Waveform Displays */
.radar-container {
    height: 240px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sla-meter-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    text-align: center;
}

.sla-number {
    font-family: var(--font-mono);
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--accent-emerald);
    text-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
    line-height: 1;
    margin: 10px 0;
}

.waveform-canvas {
    width: 100%;
    height: 100px;
    margin-top: 16px;
}

/* Speedtest Waterfall Grid */
.speedtest-waterfall {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.speed-card {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    position: relative;
    overflow: hidden;
}

.speed-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-cyan);
}

.speed-card-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
}

.speed-node-name { font-weight: 700; font-size: 0.95rem; }
.speed-tag { font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent-emerald); }

.speed-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    padding: 10px;
    border-radius: 8px;
}

.speed-num { font-family: var(--font-mono); font-weight: 800; color: #fff; font-size: 1.1rem; }
.speed-lbl { font-size: 0.7rem; color: var(--text-dim); }

/* Core Advantages Bento Grid (#features) */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    backdrop-filter: blur(16px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.feature-icon-box {
    width: 56px;
    height: 56px;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.3);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--primary-cyan);
    margin-bottom: 20px;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #fff;
}

.feature-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Pricing Section (#pricing) */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: var(--transition);
}

.pricing-card.featured {
    border-color: var(--primary-cyan);
    background: linear-gradient(180deg, rgba(0, 242, 254, 0.08) 0%, rgba(15, 23, 42, 0.9) 100%);
    box-shadow: var(--shadow-neon);
    transform: scale(1.03);
}

.pricing-pop-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-gradient);
    color: #070b14;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
}

.plan-name {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.plan-desc {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 20px;
    height: 38px;
}

.plan-price {
    font-family: var(--font-mono);
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--primary-cyan);
    margin-bottom: 24px;
}

.plan-price span {
    font-size: 0.9rem;
    color: var(--text-dim);
    font-weight: 400;
}

.plan-features {
    list-style: none;
    margin-bottom: 30px;
    flex-grow: 1;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.plan-features li svg {
    color: var(--accent-emerald);
    flex-shrink: 0;
}

/* User Reviews Section (#reviews) */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.review-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
}

.review-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: #070b14;
    font-size: 1.1rem;
}

.user-info h4 { font-size: 1rem; font-weight: 700; }
.user-info p { font-size: 0.8rem; color: var(--text-dim); }

.stars { color: #f59e0b; font-size: 0.9rem; margin-bottom: 12px; }

.review-text { font-size: 0.92rem; color: var(--text-muted); line-height: 1.6; }

/* Knowledge Base & SEO Articles (#knowledge) */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 22px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.article-card:hover {
    border-color: var(--primary-cyan);
    transform: translateY(-4px);
    background: var(--bg-card-hover);
}

.article-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--primary-cyan);
    margin-bottom: 10px;
}

.article-card-title {
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.4;
    color: #fff;
    margin-bottom: 12px;
}

.article-snippet {
    font-size: 0.82rem;
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
}

.article-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-dim);
}

/* Article Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(4, 7, 13, 0.85);
    backdrop-filter: blur(12px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-container {
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid var(--border-glow);
    border-radius: 20px;
    max-width: 840px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 40px;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #fff;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--accent-danger);
}

.modal-body h2 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: var(--primary-cyan);
}

.modal-meta {
    display: flex;
    gap: 16px;
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-content-text {
    color: var(--text-muted);
    font-size: 0.98rem;
    line-height: 1.8;
}

.modal-content-text h3 {
    color: #fff;
    font-size: 1.2rem;
    margin: 24px 0 12px;
}

.modal-content-text p {
    margin-bottom: 14px;
}

.modal-content-text ul {
    margin-bottom: 16px;
    padding-left: 20px;
}

/* FAQ Section (#faq) */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-question {
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 700;
    cursor: pointer;
    user-select: none;
    font-size: 1.05rem;
}

.faq-icon {
    font-size: 1.2rem;
    color: var(--primary-cyan);
    transition: var(--transition);
}

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

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

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

/* Maintenance Log Banner */
.maint-log-card {
    background: rgba(15, 23, 42, 0.8);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-top: 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Footer */
.footer {
    background: #04070d;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.85rem;
    color: var(--text-dim);
}

/* Responsive Layout */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; }
    .dashboard-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-title { font-size: 2.5rem; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .pricing-grid { grid-template-columns: 1fr; }
    .pricing-card.featured { transform: none; }
    .features-grid { grid-template-columns: 1fr; }
    .articles-grid { grid-template-columns: 1fr; }
    .reviews-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-stats-strip { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}