/* 灯塔云机场官网 - lighttacloud.lol Neo-Brutalist Design System */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@500;700;800&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

:root {
  --bg-primary: #38b6ab; /* Vibrant Neo-Brutalist Teal / Mint Cyan as in Image 1 */
  --bg-secondary: #f4faf9;
  --card-bg: #ffffff;
  --card-bg-highlight: #fff3ea; /* Light cream warm orange from Image 2 Plan 02 */
  
  --text-main: #111827;
  --text-muted: #4b5563;
  
  --accent-yellow: #ffde59;
  --accent-red: #ff5757;
  --accent-cyan: #5ce1e6;
  --accent-green: #00c853;
  --accent-orange: #ff914d;
  
  --border-thick: 3px solid #111827;
  --border-thin: 2px solid #111827;
  --shadow-box: 5px 5px 0px #111827;
  --shadow-box-lg: 8px 8px 0px #111827;
  --shadow-box-hover: 8px 8px 0px #111827;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --font-family: 'Plus Jakarta Sans', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  color: var(--text-main);
  background-color: var(--bg-primary);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2.15rem; }
h3 { font-size: 1.5rem; }

a {
  color: inherit;
  text-decoration: none;
}

/* Layout Utilities */
.container {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header & Nav */
.header {
  position: sticky;
  top: 1rem;
  z-index: 100;
  margin-bottom: 2rem;
}

.nav-bar {
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-box);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.4rem;
  font-weight: 900;
}

.logo-badge {
  background: var(--accent-yellow);
  border: var(--border-thin);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  box-shadow: 2px 2px 0px #111827;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

.nav-link {
  font-weight: 700;
  font-size: 0.98rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.nav-link:hover {
  background: var(--accent-yellow);
  border: var(--border-thin);
  transform: translate(-2px, -2px);
  box-shadow: 3px 3px 0px #111827;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: var(--border-thick);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-red);
  color: #ffffff;
  box-shadow: var(--shadow-box);
}

.btn-primary:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-box-hover);
  background: #ff3b3b;
}

.btn-accent {
  background: var(--accent-yellow);
  color: var(--text-main);
  box-shadow: var(--shadow-box);
}

.btn-accent:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-box-hover);
  background: #ffd633;
}

.btn-outline {
  background: #ffffff;
  color: var(--text-main);
  box-shadow: var(--shadow-box);
}

.btn-outline:hover {
  background: #f8fafc;
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-box-hover);
}

/* Neo-Brutalist Card */
.neo-card {
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-box);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.neo-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-box-lg);
}

/* Top Banner Status Bar */
.status-bar {
  background: #ffffff;
  border: var(--border-thick);
  box-shadow: var(--shadow-box);
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  font-weight: 700;
  font-size: 0.9rem;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.status-dot {
  width: 10px;
  height: 10px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(0,200,83,0.3);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0,200,83,0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0,200,83,0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0,200,83,0); }
}

/* Hero Section */
.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 3.5rem;
}

.hero-content {
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-box-lg);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
}

.tag-badge {
  display: inline-block;
  background: var(--accent-cyan);
  border: var(--border-thin);
  box-shadow: 3px 3px 0px #111827;
  padding: 0.35rem 0.9rem;
  font-weight: 800;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.2rem;
  text-transform: uppercase;
}

.hero-title {
  font-size: 2.8rem;
  margin-bottom: 1rem;
}

.hero-title span {
  background: var(--accent-yellow);
  padding: 0.1rem 0.5rem;
  border: var(--border-thin);
  border-radius: 4px;
  display: inline-block;
  transform: rotate(-1deg);
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  font-weight: 500;
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-visual {
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-box-lg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  position: relative;
}

.sticker-box {
  background: var(--accent-yellow);
  border: var(--border-thick);
  box-shadow: 4px 4px 0px #111827;
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  transform: rotate(2deg);
}

.sticker-box h4 {
  font-size: 1.5rem;
  text-transform: uppercase;
}

/* Feature Grid */
.section-title-wrap {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-title {
  display: inline-block;
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-box);
  padding: 0.6rem 1.8rem;
  border-radius: var(--radius-md);
  font-size: 2rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.feature-icon {
  width: 50px;
  height: 50px;
  background: var(--accent-yellow);
  border: var(--border-thick);
  box-shadow: 3px 3px 0px #111827;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 900;
}

/* Pricing Grid (Matching Image 2 exactly) */
.pricing-section {
  margin-bottom: 4rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.75rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-box);
  border-radius: var(--radius-md);
  padding: 2.2rem 1.8rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.pricing-card.featured {
  background: var(--card-bg-highlight); /* Soft cream/orange fill from image 2 */
  border: 3px solid var(--accent-red);
  box-shadow: 6px 6px 0px #111827;
}

.pricing-badge {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  background: var(--accent-red);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
}

.plan-code {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.plan-name {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 0.4rem;
}

.plan-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
  border-top: 1px solid #e5e7eb;
  padding-top: 1.5rem;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.plan-features li::before {
  content: "✓";
  color: var(--accent-green);
  font-weight: 900;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
  margin-bottom: 1.5rem;
}

.plan-currency {
  font-size: 1.5rem;
  font-weight: 900;
}

.plan-price {
  font-size: 2.8rem;
  font-weight: 900;
}

.plan-unit {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

.btn-pricing {
  width: 100%;
  background: transparent;
  color: var(--accent-red);
  border: none;
  font-weight: 800;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  cursor: pointer;
}

.btn-pricing::after {
  content: "→";
  font-size: 1.2rem;
  transition: transform 0.2s ease;
}

.btn-pricing:hover::after {
  transform: translateX(5px);
}

/* Tutorials & Platform Cards */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.2rem;
  margin-bottom: 3.5rem;
}

.platform-card {
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: 4px 4px 0px #111827;
  border-radius: var(--radius-md);
  padding: 1.2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.platform-card:hover {
  background: var(--accent-yellow);
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0px #111827;
}

.platform-icon {
  font-size: 2rem;
}

/* Articles Section Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.article-card {
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-box);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
}

.article-category {
  display: inline-block;
  background: var(--accent-cyan);
  border: var(--border-thin);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.article-title {
  font-size: 1.2rem;
  line-height: 1.4;
  margin: 0.4rem 0;
}

.article-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  border-top: 1px dashed #cbd5e1;
  padding-top: 0.75rem;
  margin-top: 0.5rem;
}

/* FAQ Accordion */
.faq-section {
  margin-bottom: 4rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-box);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 800;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-answer {
  padding: 0 1.5rem 1.25rem 1.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  display: none;
  border-top: 1px dashed #e2e8f0;
  margin-top: 0.5rem;
  padding-top: 1rem;
}

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

.faq-toggle {
  font-size: 1.4rem;
  font-weight: 900;
  transition: transform 0.2s ease;
}

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

/* Footer */
.footer {
  background: var(--card-bg);
  border-top: var(--border-thick);
  padding: 3rem 0 1.5rem 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--accent-yellow);
  display: inline-block;
  padding-bottom: 0.2rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--accent-red);
}

.footer-bottom {
  text-align: center;
  border-top: var(--border-thin);
  padding-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Article Reader Page Custom Layout */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--card-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-box-lg);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-bottom: 4rem;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #1f2937;
}

.article-body h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: var(--border-thin);
}

.article-body h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.article-body p {
  margin-bottom: 1.25rem;
}

.article-body ul, .article-body ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.article-body li {
  margin-bottom: 0.4rem;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  border: var(--border-thick);
}

.article-body th, .article-body td {
  border: 1px solid #111827;
  padding: 0.75rem 1rem;
  text-align: left;
}

.article-body th {
  background: var(--accent-yellow);
  font-weight: 800;
}

.callout-box {
  background: var(--accent-cyan);
  border: var(--border-thick);
  box-shadow: 4px 4px 0px #111827;
  padding: 1.2rem;
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .nav-links {
    display: none; /* Can toggle via mobile menu */
  }
  .article-container {
    padding: 1.5rem;
  }
}