/* 冲上云霄机场 - Neo-Brutalist Acid Neon Cyberpunk Style Sheet */
@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;600;700&family=Plus+Jakarta+Sans:wght@400;600;800;900&display=swap');

:root {
  --bg-dark: #070709;
  --bg-card: #0e0e12;
  --bg-card-hover: #15151c;
  --neon-green: #00FF66;
  --neon-green-glow: rgba(0, 255, 102, 0.4);
  --neon-pink: #FF2A85;
  --neon-pink-glow: rgba(255, 42, 133, 0.4);
  --neon-yellow: #FFEE00;
  --neon-purple: #A855F7;
  --text-main: #FFFFFF;
  --text-muted: #94A3B8;
  --border-light: rgba(255, 255, 255, 0.12);
  --font-heading: 'Fira Code', monospace, sans-serif;
  --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --target-link: "https://jichangbaike.speedworldaff.cc/#/?code=I2HIRA2q";
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Cyber Grid & Glowing Orbs */
.cyber-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: -2;
}

.glow-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.45;
  animation: pulseOrb 8s ease-in-out infinite alternate;
}

.glow-orb-1 {
  top: -100px;
  right: -50px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--neon-green) 0%, transparent 70%);
}

.glow-orb-2 {
  bottom: 10%;
  left: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--neon-pink) 0%, transparent 70%);
}

@keyframes pulseOrb {
  0% { transform: scale(1) translate(0, 0); opacity: 0.35; }
  100% { transform: scale(1.15) translate(-20px, 30px); opacity: 0.55; }
}

/* Top Banner Header */
.top-notice-bar {
  background: linear-gradient(90deg, #111, var(--neon-green), #111);
  color: #000;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 6px 16px;
  text-align: center;
  font-family: var(--font-heading);
  letter-spacing: 0.5px;
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  background: rgba(7, 7, 9, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--neon-green);
  z-index: 1000;
  padding: 14px 0;
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-badge {
  background: var(--neon-green);
  color: #000;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.1rem;
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 1px;
  box-shadow: 0 0 15px var(--neon-green-glow);
}

.logo-text {
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: 1px;
}

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

.nav-links a {
  color: #E2E8F0;
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  transition: all 0.2s ease;
  position: relative;
}

.nav-links a:hover {
  color: var(--neon-green);
  text-shadow: 0 0 8px var(--neon-green-glow);
}

.nav-cta {
  background: var(--neon-pink);
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 6px;
  border: 2px solid #000;
  font-weight: 700 !important;
  box-shadow: 3px 3px 0 #000;
  transition: transform 0.1s ease, box-shadow 0.1s ease !important;
}

.nav-cta:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 #000;
}

/* Hero Section inspired by Image 1 */
.hero {
  padding: 60px 24px 80px 24px;
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  position: relative;
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--neon-yellow);
  background: rgba(255, 238, 0, 0.08);
  border: 1px solid var(--neon-yellow);
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--neon-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--neon-green);
  animation: blink 1.5s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: -1px;
}

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

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

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 32px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--neon-green);
  color: #000;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.05rem;
  padding: 14px 32px;
  border-radius: 8px;
  text-decoration: none;
  border: 3px solid #000;
  box-shadow: 4px 4px 0 #000;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:hover {
  transform: translate(-3px, -3px);
  box-shadow: 7px 7px 0 #000;
  background: #22FF77;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--neon-pink);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: 8px;
  text-decoration: none;
  border: 2px solid var(--neon-pink);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: rgba(255, 42, 133, 0.15);
  box-shadow: 0 0 20px var(--neon-pink-glow);
}

/* Image 1 inspired Graphic Element (Glowing Concentric Donut / Orb) */
.hero-graphic-container {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.cyber-orb-wrapper {
  position: relative;
  width: 320px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cyber-donut-ring {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--neon-green), var(--neon-yellow), var(--neon-pink), var(--neon-purple), var(--neon-green));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  animation: rotateDonut 12s linear infinite;
  box-shadow: 0 0 50px rgba(0, 255, 102, 0.3), inset 0 0 30px rgba(255, 42, 133, 0.4);
}

@keyframes rotateDonut {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.cyber-donut-hole {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 3px solid #000;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.9);
}

.donut-stat-val {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: var(--neon-green);
  text-shadow: 0 0 10px var(--neon-green);
}

.donut-stat-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.floating-pill {
  position: absolute;
  background: rgba(14, 14, 18, 0.9);
  border: 2px solid var(--neon-green);
  color: #fff;
  padding: 8px 16px;
  border-radius: 30px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
}

.floating-pill.pill-1 { top: 10px; left: -20px; border-color: var(--neon-yellow); }
.floating-pill.pill-2 { bottom: 20px; right: -10px; border-color: var(--neon-pink); }

/* Feature Highlights Grid */
.features-bar {
  max-width: 1240px;
  margin: 0 auto 80px auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.feature-tag-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  padding: 20px;
  border-radius: 12px;
  text-align: center;
  transition: all 0.2s ease;
}

.feature-tag-card:hover {
  border-color: var(--neon-green);
  transform: translateY(-4px);
  box-shadow: 0 10px 20px var(--neon-green-glow);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 10px;
  display: block;
}

.feature-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.feature-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* SECTION TITLES */
.section-header {
  text-align: center;
  margin-bottom: 50px;
  padding: 0 24px;
}

.section-tag {
  font-family: var(--font-heading);
  color: var(--neon-green);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.5px;
}

/* PRICING SECTION - strictly following Image 2! */
.pricing-section {
  max-width: 1240px;
  margin: 0 auto 100px auto;
  padding: 0 24px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

/* Neo-Brutalist Pricing Cards matching Image 2 */
.price-card {
  background: #FFFFFF;
  color: #111111;
  border: 4px solid #111111;
  border-radius: 20px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  box-shadow: 6px 6px 0 #111111;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.price-card:hover {
  transform: translateY(-6px);
  box-shadow: 10px 10px 0 #111111;
}

/* Image 2 featured card style (Center card - 流量套餐2) */
.price-card.featured {
  background: #FFFBEB; /* Light yellowish cream background as in Image 2 */
  border-color: #F59E0B;
  box-shadow: 6px 6px 0 #F59E0B;
}

.price-card.featured:hover {
  box-shadow: 12px 12px 0 #F59E0B;
}

.card-header-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 900;
  color: #111;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.hot-badge {
  background: #EF4444;
  color: #FFF;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 12px;
}

.card-price-wrap {
  text-align: center;
  margin-bottom: 28px;
}

.card-price-num {
  font-size: 3.2rem;
  font-weight: 900;
  color: #0284C7; /* Bold blue color as in Image 2 */
  font-family: var(--font-body);
}

.card-price-unit {
  font-size: 1.1rem;
  font-weight: 700;
  color: #475569;
}

.card-feature-list {
  list-style: none;
  margin-bottom: 32px;
}

.card-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 16px;
  line-height: 1.4;
}

.star-icon {
  color: #F59E0B;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.card-btn {
  display: block;
  width: 100%;
  text-align: center;
  background: #EC4899; /* Bright Pink as in Image 2 */
  color: #FFFFFF;
  font-size: 1.25rem;
  font-weight: 900;
  padding: 16px 20px;
  border-radius: 14px;
  border: 3px solid #111111;
  text-decoration: none;
  box-shadow: 2px 2px 0 #111111;
  transition: all 0.15s ease;
  cursor: pointer;
}

.card-btn:hover {
  background: #DB2777;
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 #111111;
}

/* TUTORIALS SECTION */
.tutorials-section {
  max-width: 1240px;
  margin: 0 auto 100px auto;
  padding: 0 24px;
}

.tab-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border-light);
  font-family: var(--font-heading);
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn.active, .tab-btn:hover {
  background: var(--neon-green);
  color: #000;
  border-color: #000;
  box-shadow: 0 0 15px var(--neon-green-glow);
}

.tab-content {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  padding: 36px;
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.tutorial-step-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;

}

.step-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 24px;
  position: relative;
}

.step-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: var(--neon-pink);
  margin-bottom: 12px;
}

.step-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;

}

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

/* ARTICLES SECTION (8-12 SEO Articles) */
.articles-section {
  max-width: 1240px;
  margin: 0 auto 100px auto;
  padding: 0 24px;
}

.article-filter-bar {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.search-input {
  flex: 1;
  min-width: 260px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: #fff;
  padding: 12px 18px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--neon-green);
  box-shadow: 0 0 10px var(--neon-green-glow);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}

.art-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 14px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
  cursor: pointer;
}

.art-card:hover {
  border-color: var(--neon-green);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 255, 102, 0.15);
}

.art-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 0.78rem;
  color: var(--neon-green);
  margin-bottom: 12px;
}

.art-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  color: #fff;
  margin-bottom: 12px;
  transition: color 0.2s ease;
}

.art-card:hover .art-card-title {
  color: var(--neon-green);
}

.art-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.art-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--neon-pink);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
}

/* ARTICLE MODAL / FULL READER */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay.active {
  display: flex;
}

.modal-body {
  background: var(--bg-card);
  border: 2px solid var(--neon-green);
  border-radius: 16px;
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 40px;
  position: relative;
  box-shadow: 0 0 50px rgba(0, 255, 102, 0.2);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--neon-pink);
  color: #fff;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-weight: 900;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.article-full-content h2 {
  font-size: 1.6rem;
  color: var(--neon-green);
  margin: 28px 0 14px 0;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 8px;
}

.article-full-content h3 {
  font-size: 1.2rem;
  color: var(--neon-yellow);
  margin: 20px 0 10px 0;
}

.article-full-content p {
  color: #E2E8F0;
  line-height: 1.7;
  font-size: 0.98rem;
  margin-bottom: 16px;
}

.article-full-content ul, .article-full-content ol {
  margin: 0 0 20px 24px;
  color: #CBD5E1;
  line-height: 1.7;
}

.article-full-content .accent-link {
  color: var(--neon-pink);
  font-weight: 700;
  text-decoration: underline;
}

/* FAQ Accordion Section */
.faq-section {
  max-width: 900px;
  margin: 0 auto 100px auto;
  padding: 0 24px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  margin-bottom: 16px;
  overflow: hidden;
}

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

.faq-question:hover {
  color: var(--neon-green);
}

.faq-answer {
  padding: 0 24px 20px 24px;
  color: var(--text-muted);
  line-height: 1.6;
  font-size: 0.95rem;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

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

/* Footer & Keyword Cloud */
.footer {
  border-top: 1px solid var(--border-light);
  background: #030304;
  padding: 60px 24px 40px 24px;
}

.footer-content {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.keyword-cloud-wrap {
  margin-top: 20px;
}

.keyword-cloud-title {
  font-size: 0.85rem;
  font-family: var(--font-heading);
  color: var(--neon-green);
  margin-bottom: 10px;
}

.keyword-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.kw-tag {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.kw-tag:hover {
  color: var(--neon-yellow);
  background: rgba(255, 238, 0, 0.1);
}

.copyright {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
}

/* Responsive styles */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .nav-links {
    display: none;
  }
}