/* Crushcloud Official Site Stylesheet - Cyber Dark Tech Theme */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&family=Orbitron:wght@500;700;800;900&display=swap');

:root {
  --bg-dark: #070913;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(24, 34, 61, 0.85);
  --border-color: rgba(0, 240, 255, 0.15);
  --border-glow: rgba(0, 240, 255, 0.4);
  
  --primary: #00f0ff;
  --primary-glow: rgba(0, 240, 255, 0.5);
  --secondary: #7000ff;
  --secondary-glow: rgba(112, 0, 255, 0.5);
  --accent: #ff007f;
  --success: #00ff88;
  --warning: #ffb700;
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-heading: 'Orbitron', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-neon: 0 0 25px rgba(0, 240, 255, 0.25);
  --shadow-purple: 0 0 25px rgba(112, 0, 255, 0.25);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

.cyber-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    linear-gradient(to right, rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: -1;
  pointer-events: none;
}

.ambient-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: -1;
}

.ambient-glow-1 {
  top: -100px;
  left: -100px;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.18), transparent 70%);
}

.ambient-glow-2 {
  top: 40%;
  right: -150px;
  background: radial-gradient(circle, rgba(112, 0, 255, 0.2), transparent 70%);
}

/* Container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography & Utilities */
h1, h2, h3, h4, .tech-title {
  font-family: var(--font-heading);
  letter-spacing: 0.5px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, #a855f7 50%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px auto;
}

.section-header h2 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}

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

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.glass-card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 10px 30px rgba(0, 240, 255, 0.12);
  transform: translateY(-4px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #00a8ff 100%);
  color: #030712;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
  transform: translateY(-2px);
  filter: brightness(1.1);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

/* Header & Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(7, 9, 19, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 240, 255, 0.1);
  padding: 16px 0;
  transition: var(--transition);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.4rem;
}

.brand-logo svg {
  width: 36px;
  height: 36px;
  color: var(--primary);
  filter: drop-shadow(0 0 8px var(--primary));
}

.brand-img-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 0 12px var(--primary);
  border: 1px solid var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

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

.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

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

/* Hero Section */
.hero {
  padding: 180px 0 100px 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.2rem;
  line-height: 1.15;
  margin-bottom: 24px;
  font-weight: 900;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 540px;
}

.hero-btns {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item .stat-num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  text-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
}

.stat-item .stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Hero Graphic / Speed Visualizer Mock */
.hero-visual {
  position: relative;
}

.visual-card {
  padding: 30px;
  border: 1px solid var(--border-glow);
  box-shadow: var(--shadow-neon);
  background: linear-gradient(145deg, rgba(15, 23, 42, 0.9), rgba(7, 12, 27, 0.95));
  position: relative;
  overflow: hidden;
}

.visual-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  animation: scanline 3s linear infinite;
}

@keyframes scanline {
  0% { left: -100%; }
  100% { left: 100%; }
}

.speedometer-wrap {
  text-align: center;
  padding: 20px 0;
}

.speed-value {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.speed-unit {
  font-size: 1.2rem;
  color: var(--text-muted);
}

.visual-badges {
  display: flex;
  justify-content: space-around;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 10px var(--success);
}

/* Features Grid */
.features-section {
  padding: 100px 0;
}

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

.feature-card {
  padding: 36px 28px;
  position: relative;
}

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--primary);
}

.feature-icon svg {
  width: 30px;
  height: 30px;
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

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

/* Real-Time Node Speed Table Section (指令 5) */
.speed-table-section {
  padding: 100px 0;
  position: relative;
}

.node-table-container {
  overflow-x: auto;
  border-radius: var(--radius-md);
}

.node-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-family: var(--font-body);
}

.node-table th {
  background: rgba(15, 23, 42, 0.95);
  padding: 18px 24px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 2px solid rgba(0, 240, 255, 0.2);
}

.node-table td {
  padding: 18px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.95rem;
}

.node-table tr:hover {
  background: rgba(0, 240, 255, 0.04);
}

.location-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.flag-icon {
  font-size: 1.2rem;
}

.ping-bar-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
}

.ping-bar {
  height: 6px;
  width: 80px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.ping-bar-inner {
  height: 100%;
  background: var(--success);
  border-radius: 3px;
}

.ping-bar-inner.medium {
  background: var(--warning);
}

.protocol-tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(112, 0, 255, 0.15);
  border: 1px solid rgba(112, 0, 255, 0.3);
  border-radius: 4px;
  color: #c084fc;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.table-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding: 0 4px;
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--success);
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(0, 255, 136, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 136, 0); }
}

/* Pricing Section */
.pricing-section {
  padding: 100px 0;
}

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

.pricing-card {
  padding: 36px 28px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.pricing-card.popular {
  border-color: var(--primary);
  box-shadow: var(--shadow-neon);
  transform: scale(1.04);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.plan-header {
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.plan-price {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary);
}

.plan-price span {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-family: var(--font-body);
}

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

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

.plan-features svg {
  width: 16px;
  height: 16px;
  color: var(--success);
  flex-shrink: 0;
}

/* Customer Reviews Auto Marquee (指令 4) */
.reviews-section {
  padding: 100px 0;
  overflow: hidden;
}

.marquee-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee-scroll 40s linear infinite;
}

.marquee-track-reverse {
  animation: marquee-scroll-reverse 45s linear infinite;
}

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

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

.marquee-track:hover, .marquee-track-reverse:hover {
  animation-play-state: paused;
}

.review-card {
  width: 360px;
  padding: 24px;
  flex-shrink: 0;
}

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

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
}

.user-info h4 {
  font-size: 0.95rem;
  font-family: var(--font-body);
  font-weight: 600;
}

.user-info p {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.stars {
  color: var(--warning);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* SEO Articles Showcase */
.articles-section {
  padding: 100px 0;
}

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

.article-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 30px;
  text-decoration: none;
  color: inherit;
}

.article-category {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.article-card h3 {
  font-size: 1.15rem;
  line-height: 1.4;
  margin-bottom: 14px;
  transition: var(--transition);
}

.article-card:hover h3 {
  color: var(--primary);
}

.article-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 14px;
}

/* FAQ Accordion */
.faq-section {
  padding: 100px 0;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  width: 100%;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
}

.faq-icon {
  width: 24px;
  height: 24px;
  color: var(--primary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 28px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 28px 24px 28px;
}

/* Article Detail Page Layout */
.article-page {
  padding: 160px 0 100px 0;
}

.article-container {
  max-width: 860px;
  margin: 0 auto;
}

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

.article-header h1 {
  font-size: 2.4rem;
  line-height: 1.3;
  margin-bottom: 20px;
}

.article-header-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.article-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 1.6rem;
  color: var(--text-main);
  margin: 36px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0, 240, 255, 0.2);
}

.article-content h3 {
  font-size: 1.3rem;
  color: var(--text-main);
  margin: 28px 0 12px 0;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

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

.article-cta-box {
  margin: 40px 0;
  padding: 30px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(112, 0, 255, 0.1));
  border: 1px solid var(--primary);
  border-radius: var(--radius-md);
  text-align: center;
}

.article-cta-box h3 {
  margin-top: 0;
  font-size: 1.4rem;
  color: var(--primary);
}

.article-cta-box p {
  margin-bottom: 20px;
  color: var(--text-muted);
}

.internal-nav {
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.internal-nav a {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.internal-nav a:hover {
  text-decoration: underline;
}

/* Footer & PBN Links (Core Task 2) */
footer {
  background: rgba(4, 6, 14, 0.95);
  border-top: 1px solid rgba(0, 240, 255, 0.1);
  padding: 60px 0 30px 0;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  margin-bottom: 40px;
}

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

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

/* Core Task 2: PBN Friend Links styling */
.friend-links-area {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.8rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.friend-links-area span {
  color: rgba(255, 255, 255, 0.3);
}

.friend-links-area a {
  color: var(--text-dim);
  text-decoration: none;
  transition: var(--transition);
}

.friend-links-area a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.copyright {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .features-grid, .pricing-grid, .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.popular {
    transform: none;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero-content h1 {
    font-size: 2.2rem;
  }
  .features-grid, .pricing-grid, .articles-grid {
    grid-template-columns: 1fr;
  }
  .section-header h2 {
    font-size: 1.8rem;
  }
  .article-content {
    padding: 24px;
  }
}