/* ==========================================================================
   肯の机机场官网 - Cyberpunk Dark Red Theme Stylesheet
   ========================================================================== */

:root {
  --bg-main: #060609;
  --bg-card: rgba(18, 16, 25, 0.75);
  --bg-card-hover: rgba(28, 22, 38, 0.85);
  --bg-glass: rgba(12, 10, 18, 0.8);
  --border-cyber: rgba(255, 0, 60, 0.25);
  --border-glow: rgba(255, 0, 60, 0.6);
  --color-red: #ff003c;
  --color-red-bright: #ff2a5f;
  --color-red-glow: rgba(255, 0, 60, 0.4);
  --color-cyan: #00f0ff;
  --color-text-main: #f0f2f5;
  --color-text-muted: #9a9daf;
  --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Fira Code', 'Courier New', monospace;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-neon: 0 0 25px rgba(255, 0, 60, 0.35);
}

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--color-text-main);
  font-family: var(--font-family);
  overflow-x: hidden;
}

body {
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
}

/* Dynamic Background Canvas */
#cyber-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

ul {
  list-style: none;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: var(--color-red);
  border-radius: 4px;
  box-shadow: 0 0 10px var(--color-red);
}

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

.section {
  padding: 100px 0;
  position: relative;
}

/* Cyber Header Tag */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 0, 60, 0.1);
  border: 1px solid var(--color-red-glow);
  color: var(--color-red-bright);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  border-radius: 20px;
  margin-bottom: 16px;
}

.section-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: var(--color-red);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-red);
  animation: pulse-red 1.5s infinite alternate;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 40%, var(--color-text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto 60px auto;
}

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

/* Cyber Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-red) 0%, #b8002a 100%);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 20px rgba(255, 0, 60, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 30px rgba(255, 0, 60, 0.7);
  background: linear-gradient(135deg, var(--color-red-bright) 0%, var(--color-red) 100%);
}

.btn-outline {
  background: rgba(255, 0, 60, 0.05);
  color: #ffffff;
  border-color: var(--border-cyber);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  border-color: var(--color-red);
  background: rgba(255, 0, 60, 0.15);
  box-shadow: var(--shadow-neon);
  transform: translateY(-2px);
}

/* Modern Cyberpunk Header */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-cyber);
  transition: var(--transition-normal);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 1px;
  color: #fff;
}

.logo-badge {
  background: var(--color-red);
  color: #fff;
  padding: 4px 8px;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  box-shadow: 0 0 10px var(--color-red-glow);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
  padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-red);
  box-shadow: 0 0 8px var(--color-red);
  transition: var(--transition-fast);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding-top: 180px;
  padding-bottom: 120px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-title-highlight {
  color: var(--color-red-bright);
  text-shadow: 0 0 20px var(--color-red-glow);
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-item h3 {
  font-size: 2rem;
  font-family: var(--font-mono);
  color: var(--color-red-bright);
  font-weight: 800;
}

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

/* Cyber Interactive Terminal Card */
.terminal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  position: relative;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Live Node Visualizer */
.node-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.node-item:hover {
  background: rgba(255, 0, 60, 0.08);
  border-color: var(--border-cyber);
  transform: translateX(6px);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.node-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.node-type {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-text-muted);
}

.node-ping {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #00ff88;
}

.ping-dot {
  width: 8px;
  height: 8px;
  background: #00ff88;
  border-radius: 50%;
  box-shadow: 0 0 8px #00ff88;
}

/* Package Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  backdrop-filter: blur(12px);
  position: relative;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.pricing-card:hover {
  border-color: var(--color-red);
  box-shadow: var(--shadow-neon);
  transform: translateY(-8px);
}

.pricing-card.featured {
  border-color: var(--color-red-bright);
  background: linear-gradient(180deg, rgba(255, 0, 60, 0.12) 0%, rgba(18, 16, 25, 0.85) 100%);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  right: 24px;
  background: var(--color-red);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 12px;
  font-family: var(--font-mono);
  box-shadow: 0 0 12px var(--color-red-glow);
}

.pricing-plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 24px;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.pricing-features {
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.pricing-features li svg {
  color: var(--color-red-bright);
  flex-shrink: 0;
}

/* Core Advantages Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition-normal);
  backdrop-filter: blur(10px);
}

.feature-card:hover {
  border-color: var(--color-red-bright);
  background: var(--bg-card-hover);
  transform: translateY(-5px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(255, 0, 60, 0.1);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-red-bright);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Reviews Grid */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}

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

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-red) 0%, #550015 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  border: 1px solid var(--border-cyber);
}

.user-info h4 {
  font-size: 1rem;
  font-weight: 700;
}

.user-tag {
  font-size: 0.75rem;
  color: var(--color-red-bright);
  font-family: var(--font-mono);
}

.review-stars {
  color: #ffb800;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

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

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

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-item.active {
  border-color: var(--border-cyber);
}

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

.faq-icon {
  transition: transform var(--transition-fast);
  color: var(--color-red-bright);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 24px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

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

/* Articles Knowledge Base Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  border-color: var(--color-red);
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(255, 0, 60, 0.2);
}

.article-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-category {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-red-bright);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  color: #fff;
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.read-more {
  color: var(--color-red-bright);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Article Detail Page Layout */
.article-detail-page {
  padding-top: 140px;
  padding-bottom: 100px;
  max-width: 900px;
  margin: 0 auto;
}

.back-to-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-red-bright);
  font-weight: 600;
  margin-bottom: 24px;
  font-family: var(--font-mono);
}

.article-header {
  margin-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 30px;
}

.article-header h1 {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.9;
  color: #d1d5db;
}

.article-content h2 {
  font-size: 1.6rem;
  color: #ffffff;
  margin: 36px 0 18px 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-cyber);
}

.article-content h3 {
  font-size: 1.25rem;
  color: var(--color-red-bright);
  margin: 24px 0 12px 0;
}

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

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

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

.article-cta-box {
  background: linear-gradient(135deg, rgba(255, 0, 60, 0.15) 0%, rgba(18, 16, 25, 0.9) 100%);
  border: 1px solid var(--color-red);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  margin: 50px 0;
  box-shadow: var(--shadow-neon);
}

.article-cta-box h3 {
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 12px;
}

.article-cta-box p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* Footer */
.footer {
  background: rgba(4, 4, 6, 0.95);
  border-top: 1px solid var(--border-cyber);
  padding: 60px 0 30px 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

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

.footer-brand h3 {
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 12px;
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Keyframes */
@keyframes pulse-red {
  0% { transform: scale(1); opacity: 0.7; }
  100% { transform: scale(1.4); opacity: 1; }
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-content h1 {
    font-size: 2.8rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: var(--bg-main);
    flex-direction: column;
    justify-content: center;
    transition: var(--transition-normal);
  }
  .nav-menu.active {
    left: 0;
  }
  .nav-toggle {
    display: block;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .hero-content h1 {
    font-size: 2.2rem;
  }
  .hero-stats {
    grid-template-columns: 1fr;
  }
}