/* 星辰机场 (Xingchen Cloud) Custom Design System */
:root {
  --bg-primary: #0b0d19;
  --bg-secondary: #13172d;
  --bg-card: rgba(23, 27, 54, 0.7);
  --bg-card-hover: rgba(35, 41, 78, 0.85);
  
  --primary-gradient: linear-gradient(135deg, #7928CA 0%, #FF0080 50%, #00DFD8 100%);
  --accent-purple: #7928CA;
  --accent-pink: #FF0080;
  --accent-cyan: #00DFD8;
  --accent-yellow: #FFBD59;
  
  --text-main: #f1f3f9;
  --text-muted: #9aa5ce;
  --text-highlight: #00DFD8;
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(0, 223, 216, 0.4);
  
  --font-kaiti: "KaiTi", "楷体", "STKaiti", "DFKai-SB", serif, system-ui;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
}

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

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

body {
  font-family: var(--font-kaiti);
  background: radial-gradient(circle at 10% 20%, rgba(121, 40, 202, 0.15) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(0, 223, 216, 0.15) 0%, transparent 40%),
              var(--bg-primary);
  line-height: 1.7;
  position: relative;
  min-height: 100vh;
}

/* Background Particle Canvas */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

.content-wrapper {
  position: relative;
  z-index: 1;
}

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

/* Typography Custom KaiTi */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-kaiti);
  font-weight: 700;
  letter-spacing: 1px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(11, 13, 25, 0.75);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.6rem;
  font-weight: bold;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  box-shadow: 0 0 15px rgba(255, 0, 128, 0.5);
}

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

.nav-links a {
  font-size: 1.1rem;
  color: var(--text-muted);
  position: relative;
  padding: 8px 0;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: width 0.3s ease;
}

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

.btn-jump {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 50px;
  background: var(--primary-gradient);
  color: #fff !important;
  font-weight: bold;
  font-size: 1.05rem;
  box-shadow: 0 4px 20px rgba(121, 40, 202, 0.4);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.btn-jump:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 30px rgba(255, 0, 128, 0.6);
}

.btn-jump-outline {
  background: transparent;
  border: 2px solid var(--accent-cyan);
  color: var(--accent-cyan) !important;
  box-shadow: 0 0 15px rgba(0, 223, 216, 0.2);
}

.btn-jump-outline:hover {
  background: rgba(0, 223, 216, 0.1);
  box-shadow: 0 0 25px rgba(0, 223, 216, 0.5);
  transform: translateY(-3px);
}

/* Asymmetric Hero Section */
.hero {
  padding: 160px 0 100px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 30px;
  background: rgba(0, 223, 216, 0.1);
  border: 1px solid rgba(0, 223, 216, 0.3);
  color: var(--accent-cyan);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(180deg, #FFFFFF 0%, #A5B4FC 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: 20px;
  align-items: center;
}

.hero-visual {
  position: relative;
}

.hero-card-stack {
  position: relative;
  width: 100%;
  height: 420px;
}

.glass-card {
  position: absolute;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.glass-card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 10px 30px rgba(0, 223, 216, 0.15);
  transform: translateY(-8px);
}

.card-main {
  width: 90%;
  top: 0;
  left: 0;
  z-index: 2;
  background: linear-gradient(135deg, rgba(30, 27, 75, 0.8) 0%, rgba(15, 23, 42, 0.9) 100%);
}

.card-float-1 {
  width: 75%;
  bottom: 10px;
  right: -20px;
  z-index: 3;
  border-color: rgba(255, 0, 128, 0.3);
  animation: floatAnim 6s ease-in-out infinite alternate;
}

.card-float-2 {
  width: 60%;
  top: 40px;
  right: -30px;
  z-index: 1;
  opacity: 0.6;
}

@keyframes floatAnim {
  0% { transform: translateY(0px) rotate(0deg); }
  100% { transform: translateY(-15px) rotate(2deg); }
}

/* Feature Section - Asymmetric Grid */
.section {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.15rem;
  margin-bottom: 60px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: rgba(121, 40, 202, 0.5);
  box-shadow: 0 10px 30px rgba(121, 40, 202, 0.2);
}

.feature-box.col-8 { grid-column: span 8; }
.feature-box.col-4 { grid-column: span 4; }
.feature-box.col-6 { grid-column: span 6; }

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
  display: inline-block;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.feature-box p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Pricing Section - Exact Match Image 1 */
.pricing-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 40px;
}

.pricing-card {
  background: #121629;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 223, 216, 0.4);
  box-shadow: 0 15px 40px rgba(0, 223, 216, 0.15);
}

.pricing-title {
  font-size: 1.5rem;
  color: #ffffff;
  margin-bottom: 16px;
  font-weight: bold;
}

.pricing-price {
  font-size: 2.4rem;
  font-weight: 800;
  color: #ffffff;
  display: flex;
  align-items: baseline;
  margin-bottom: 30px;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: normal;
  margin-left: 6px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 40px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.98rem;
  color: #cbd5e1;
}

.pricing-features li.disabled {
  color: #64748b;
}

.icon-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1.5px solid #00DFD8;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #00DFD8;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.icon-cross {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1.5px solid #475569;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #475569;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.btn-price-buy {
  width: 100%;
  padding: 14px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(0, 223, 216, 0.4);
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: bold;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 223, 216, 0.1);
}

.btn-price-buy:hover {
  background: var(--primary-gradient);
  border-color: transparent;
  box-shadow: 0 6px 25px rgba(255, 0, 128, 0.4);
}

/* Nodes Table Section */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all 0.3s ease;
}

.node-card:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 223, 216, 0.05);
}

.node-flag {
  font-size: 2rem;
}

.node-info h4 {
  font-size: 1.1rem;
  color: #fff;
}

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

.node-status {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: #10b981;
}

.node-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

/* Article Cards Section */
.article-section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 30px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-pink);
  box-shadow: 0 10px 30px rgba(255, 0, 128, 0.15);
}

.article-meta {
  display: flex;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.article-tag {
  background: rgba(121, 40, 202, 0.2);
  color: var(--accent-cyan);
  padding: 2px 10px;
  border-radius: 12px;
}

.article-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: #fff;
  line-height: 1.4;
}

.article-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-link {
  color: var(--accent-cyan);
  font-weight: bold;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* FAQ Section */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-question {
  padding: 24px;
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-answer {
  padding: 0 24px 24px;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* Keyword Cloud Tag Pill */
.keyword-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0;
  justify-content: center;
}

.keyword-pill {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all 0.3s ease;
}

.keyword-pill:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  transform: scale(1.05);
}

/* Footer */
.footer {
  background: rgba(7, 9, 17, 0.95);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  margin-top: 100px;
}

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

.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: #fff;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-col ul li a:hover {
  color: var(--accent-cyan);
}

.copyright {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Article Detail Pages Specific Styling */
.article-container {
  max-width: 900px;
  margin: 140px auto 80px;
  padding: 0 24px;
}

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

.article-header-box h1 {
  font-size: 2.4rem;
  margin-bottom: 20px;
  line-height: 1.3;
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.article-info-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  flex-wrap: wrap;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.article-body {
  font-size: 1.15rem;
  line-height: 1.9;
  color: #d1d5db;
}

.article-body h2 {
  font-size: 1.8rem;
  color: #ffffff;
  margin: 40px 0 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent-purple);
}

.article-body h3 {
  font-size: 1.4rem;
  color: var(--accent-cyan);
  margin: 30px 0 15px;
}

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

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

.article-body li {
  margin-bottom: 10px;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(121, 40, 202, 0.2) 0%, rgba(0, 223, 216, 0.1) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 36px;
  text-align: center;
  margin: 50px 0;
}

/* Responsive */
@media (max-width: 992px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 120px;
  }
  .hero-cta {
    justify-content: center;
  }
  .pricing-container {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .feature-box.col-8, .feature-box.col-4, .feature-box.col-6 {
    grid-column: span 1;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero-title {
    font-size: 2.4rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}