/* ==========================================================================
   泰山机场 (taishanjc.cfd) - 8-Bit / 16-Bit Pixel Art Retro Arcade Theme
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&family=VT323&family=Noto+Sans+SC:wght@400;700;900&display=swap');

:root {
  /* Color Palette - Arcade Cyber Retro */
  --bg-dark: #0d0a1a;
  --bg-card: #18132b;
  --bg-card-hover: #221a3d;
  --border-color: #ff007f;
  
  --pixel-cyan: #00f0ff;
  --pixel-pink: #ff007f;
  --pixel-yellow: #ffcc00;
  --pixel-green: #00ff66;
  --pixel-purple: #9d00ff;
  --pixel-orange: #ff6600;
  --text-main: #f0f0ff;
  --text-muted: #a0a0c0;

  --font-pixel: 'Press Start 2P', 'VT323', cursive, monospace;
  --font-sans: 'Noto Sans SC', sans-serif;
  
  --pixel-shadow: 4px 4px 0px #000000;
  --pixel-shadow-cyan: 4px 4px 0px var(--pixel-cyan);
  --pixel-shadow-pink: 4px 4px 0px var(--pixel-pink);
  --pixel-shadow-yellow: 4px 4px 0px var(--pixel-yellow);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 50% 20%, rgba(157, 0, 255, 0.15) 0%, transparent 60%),
    linear-gradient(rgba(13, 10, 26, 0.95), rgba(13, 10, 26, 0.95)),
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 240, 255, 0.03) 3px, transparent 4px);
  background-size: 100% 100%, 100% 100%, 100% 4px;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Cursor Wings Canvas Container */
#cursor-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}

/* Pixel Border Utility */
.pixel-box {
  background: var(--bg-card);
  border: 4px solid #000;
  box-shadow: 
    -4px 0 0 0 #000,
    4px 0 0 0 #000,
    0 -4px 0 0 #000,
    0 4px 0 0 #000,
    6px 6px 0 0 var(--pixel-cyan);
  position: relative;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.pixel-box:hover {
  transform: translate(-2px, -2px);
  box-shadow: 
    -4px 0 0 0 #000,
    4px 0 0 0 #000,
    0 -4px 0 0 #000,
    0 4px 0 0 #000,
    8px 8px 0 0 var(--pixel-pink);
}

.pixel-box-yellow {
  box-shadow: 
    -4px 0 0 0 #000,
    4px 0 0 0 #000,
    0 -4px 0 0 #000,
    0 4px 0 0 #000,
    6px 6px 0 0 var(--pixel-yellow);
}

.pixel-box-green {
  box-shadow: 
    -4px 0 0 0 #000,
    4px 0 0 0 #000,
    0 -4px 0 0 #000,
    0 4px 0 0 #000,
    6px 6px 0 0 var(--pixel-green);
}

/* Typography Headers */
.font-pixel {
  font-family: var(--font-pixel);
  letter-spacing: 1px;
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 900;
}

.pixel-title {
  color: #fff;
  text-transform: uppercase;
  text-shadow: 3px 3px 0px var(--pixel-pink), -2px -2px 0px var(--pixel-cyan);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(13, 10, 26, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 4px solid var(--pixel-pink);
  padding: 12px 0;
}

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

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

.logo-icon {
  font-size: 1.8rem;
  animation: float 2s ease-in-out infinite;
}

.logo-text {
  font-family: var(--font-pixel);
  font-size: 1.1rem;
  color: var(--pixel-cyan);
  text-shadow: 2px 2px 0px #000, -1px -1px 0px var(--pixel-pink);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #000;
  border: 2px solid var(--pixel-green);
  padding: 3px 8px;
  font-size: 0.75rem;
  color: var(--pixel-green);
  font-family: var(--font-pixel);
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--pixel-green);
  box-shadow: 0 0 6px var(--pixel-green);
  animation: blink 1s step-start infinite;
}

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

.nav-links a {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: color 0.2s ease;
  position: relative;
}

.nav-links a:hover {
  color: var(--pixel-cyan);
  text-shadow: 0 0 8px var(--pixel-cyan);
}

/* Retro Buttons */
.btn-pixel {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 1.05rem;
  color: #000;
  background-color: var(--pixel-yellow);
  text-decoration: none;
  border: 3px solid #000;
  box-shadow: 4px 4px 0px #000, 4px 4px 0px 0px var(--pixel-cyan);
  cursor: pointer;
  transition: all 0.1s ease;
  text-transform: uppercase;
}

.btn-pixel:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px #000, 6px 6px 0px 0px var(--pixel-pink);
  background-color: #ffee00;
}

.btn-pixel:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0px #000;
}

.btn-pixel-cyan {
  background-color: var(--pixel-cyan);
  color: #000;
}

.btn-pixel-cyan:hover {
  background-color: #66f5ff;
}

.btn-pixel-pink {
  background-color: var(--pixel-pink);
  color: #fff;
}

.btn-pixel-pink:hover {
  background-color: #ff3399;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: 3px solid var(--pixel-cyan);
  color: var(--pixel-cyan);
  padding: 6px 12px;
  font-family: var(--font-pixel);
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: 70px 0 50px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-block;
  background: rgba(0, 240, 255, 0.15);
  border: 2px solid var(--pixel-cyan);
  color: var(--pixel-cyan);
  padding: 6px 16px;
  font-family: var(--font-pixel);
  font-size: 0.8rem;
  margin-bottom: 24px;
  box-shadow: 3px 3px 0px #000;
}

.hero-title {
  font-size: 2.8rem;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #fff;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 36px;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* Retro Pixel Stats Board */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.stat-card {
  padding: 20px;
  text-align: center;
  background: var(--bg-card);
}

.stat-value {
  font-family: var(--font-pixel);
  font-size: 1.8rem;
  color: var(--pixel-green);
  text-shadow: 2px 2px 0px #000;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 700;
}

/* Section Common */
.section {
  padding: 70px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Feature Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.feature-card {
  padding: 30px 24px;
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
}

.feature-title {
  font-size: 1.3rem;
  color: var(--pixel-cyan);
  margin-bottom: 12px;
}

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

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

.price-card {
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg-card);
}

.price-card.popular {
  border-color: var(--pixel-yellow);
  box-shadow: 
    -4px 0 0 0 #000,
    4px 0 0 0 #000,
    0 -4px 0 0 #000,
    0 4px 0 0 #000,
    8px 8px 0 0 var(--pixel-yellow);
}

.popular-badge {
  position: absolute;
  top: -16px;
  right: 16px;
  background: var(--pixel-yellow);
  color: #000;
  font-family: var(--font-pixel);
  font-size: 0.7rem;
  padding: 4px 10px;
  border: 2px solid #000;
  box-shadow: 2px 2px 0 #000;
}

.price-name {
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 8px;
}

.price-val {
  font-family: var(--font-pixel);
  font-size: 2.2rem;
  color: var(--pixel-pink);
  margin-bottom: 16px;
}

.price-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
}

.price-features {
  list-style: none;
  margin: 20px 0 30px;
}

.price-features li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.price-features li::before {
  content: '✓';
  color: var(--pixel-green);
  font-weight: bold;
}

/* Articles Section */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.article-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-tag {
  display: inline-block;
  background: rgba(255, 0, 127, 0.15);
  color: var(--pixel-pink);
  border: 1px solid var(--pixel-pink);
  font-size: 0.75rem;
  padding: 2px 8px;
  margin-bottom: 12px;
  font-weight: bold;
}

.article-title {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: #fff;
  line-height: 1.4;
}

.article-title a {
  color: inherit;
  text-decoration: none;
}

.article-title a:hover {
  color: var(--pixel-cyan);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.article-link {
  color: var(--pixel-yellow);
  font-weight: 700;
  text-decoration: none;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-link:hover {
  text-decoration: underline;
}

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

.review-card {
  padding: 24px;
  background: var(--bg-card);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  background: var(--pixel-purple);
  border: 2px solid #000;
  box-shadow: 2px 2px 0 #000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.review-user {
  font-weight: bold;
  color: #fff;
}

.review-stars {
  color: var(--pixel-yellow);
  font-size: 0.85rem;
}

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

/* FAQ Accordion */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 3px solid #000;
  box-shadow: 4px 4px 0 #000;
}

.faq-question {
  width: 100%;
  padding: 18px 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
}

.faq-question:hover {
  color: var(--pixel-cyan);
}

.faq-icon {
  font-family: var(--font-pixel);
  font-size: 1rem;
  color: var(--pixel-pink);
  transition: transform 0.2s ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px 24px;
}

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

/* SEO Full Article Content Layout */
.article-page {
  padding: 40px 0 80px;
}

.article-container {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-card);
  padding: 40px 36px;
  border: 4px solid #000;
  box-shadow: 8px 8px 0 var(--pixel-cyan);
}

.article-header {
  border-bottom: 2px dashed var(--pixel-pink);
  padding-bottom: 24px;
  margin-bottom: 30px;
}

.article-page-title {
  font-size: 2rem;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.3;
}

.article-meta {
  display: flex;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #d8d8f0;
}

.article-body h2 {
  font-size: 1.5rem;
  color: var(--pixel-cyan);
  margin: 32px 0 16px;
  border-left: 4px solid var(--pixel-pink);
  padding-left: 12px;
}

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

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

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

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

.article-body a {
  color: var(--pixel-cyan);
  text-decoration: underline;
}

.article-body a:hover {
  color: var(--pixel-pink);
}

.article-cta-box {
  margin: 40px 0;
  padding: 24px;
  background: rgba(0, 240, 255, 0.08);
  border: 3px solid var(--pixel-cyan);
  text-align: center;
}

/* Footer & PBN Weight Pipeline */
footer.pbn-footer {
  background-color: #080612;
  border-top: 4px solid var(--pixel-purple);
  padding: 40px 20px 30px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 60px;
  position: relative;
}

.footer-content {
  max-width: 1000px;
  margin: 0 auto;
}

.footer-logo {
  font-family: var(--font-pixel);
  color: var(--pixel-cyan);
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

/* Discreet PBN Friend Links Section */
.pbn-links-container {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dotted rgba(255, 255, 255, 0.1);
  font-size: 0.78rem;
  line-height: 1.8;
  color: #6a6888;
}

.pbn-links-title {
  font-size: 0.75rem;
  color: #7b7999;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pbn-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 18px;
  list-style: none;
}

.pbn-links a {
  color: #8c89b3;
  text-decoration: none;
  transition: color 0.2s ease;
}

.pbn-links a:hover {
  color: var(--pixel-cyan);
  text-decoration: underline;
}

/* Mobile Responsive Adjustments */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-card);
    border-bottom: 4px solid var(--pixel-pink);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
  }

  .nav-links.show {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .article-container {
    padding: 24px 16px;
  }
}

/* Retro Scanline Overlay Effect */
.scanline-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.15) 50%
  );
  background-size: 100% 4px;
  z-index: 9998;
  opacity: 0.4;
}

/* Keyframe Animations */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}