/* ============================================================
   优信云机场 - 主样式文件
   youxinyun.lat
   ============================================================ */

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

:root {
  --primary: #6c63ff;
  --primary-light: #8b85ff;
  --primary-dark: #4d44e8;
  --secondary: #00c9ff;
  --accent: #ff6b6b;
  --gradient: linear-gradient(135deg, #6c63ff 0%, #00c9ff 100%);
  --gradient-hero: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  --bg: #0a0a1a;
  --bg-card: #12122a;
  --bg-card-hover: #1a1a35;
  --text-primary: #ffffff;
  --text-secondary: #b0b0cc;
  --text-muted: #6b6b8a;
  --border: rgba(108,99,255,0.2);
  --border-hover: rgba(108,99,255,0.5);
  --shadow: 0 8px 32px rgba(108,99,255,0.15);
  --shadow-hover: 0 16px 48px rgba(108,99,255,0.3);
  --radius: 16px;
  --transition: all 0.3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(108,99,255,0.6); }
.btn-hero {
  background: var(--gradient);
  color: #fff;
  padding: 16px 40px;
  font-size: 17px;
  box-shadow: 0 8px 40px rgba(108,99,255,0.5);
}
.btn-hero:hover { transform: translateY(-3px); box-shadow: 0 12px 50px rgba(108,99,255,0.7); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
  padding: 14px 36px;
  font-size: 16px;
}
.btn-outline:hover { border-color: var(--primary-light); background: rgba(108,99,255,0.1); }
.btn-plan {
  width: 100%;
  justify-content: center;
  background: linear-gradient(135deg, rgba(108,99,255,0.15), rgba(0,201,255,0.15));
  color: var(--primary-light);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 13px 24px;
  margin-top: 20px;
  font-size: 15px;
}
.btn-plan:hover { background: var(--gradient); color: #fff; border-color: transparent; transform: translateY(-2px); }
.btn-plan-featured {
  width: 100%;
  justify-content: center;
  background: var(--gradient);
  color: #fff;
  border-radius: 12px;
  padding: 13px 24px;
  margin-top: 20px;
  font-size: 15px;
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
}
.btn-plan-featured:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(108,99,255,0.6); }

/* ---- Navbar ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: var(--transition);
  background: rgba(10,10,26,0);
}
.navbar.scrolled {
  background: rgba(10,10,26,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
}
.logo {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 20px;
  color: #fff;
}
.logo-icon { font-size: 24px; }
.logo-text { color: var(--primary-light); }
.logo-sub { color: var(--text-secondary); font-size: 14px; font-weight: 400; }
.nav-links {
  display: flex;
  list-style: none;
  gap: 28px;
  margin-left: auto;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}
.nav-links a:hover { color: #fff; }
.nav-cta { margin-left: 8px; padding: 10px 22px; font-size: 14px; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition); display: block; }

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--gradient-hero);
  padding: 120px 0 80px;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: floatOrb 8s ease-in-out infinite;
}
.orb1 { width: 500px; height: 500px; background: #6c63ff; top: -100px; left: -100px; }
.orb2 { width: 400px; height: 400px; background: #00c9ff; bottom: -100px; right: -100px; animation-delay: -4s; }
.orb3 { width: 300px; height: 300px; background: #ff6b6b; top: 50%; right: 20%; animation-delay: -2s; }
@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.1); }
}
.hero-content {
  position: relative;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(108,99,255,0.15);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 13px;
  color: var(--secondary);
  font-weight: 500;
  margin-bottom: 28px;
}
.badge-dot { width: 8px; height: 8px; background: #00ff88; border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.6;transform:scale(1.3)} }
.hero-title {
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 28px;
  letter-spacing: -1px;
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}
.hero-desc strong { color: var(--secondary); }
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  padding: 24px 40px;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.stat-item { text-align: center; }
.stat-num { font-size: 28px; font-weight: 800; color: var(--secondary); }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }
.stat-divider { width: 1px; height: 40px; background: var(--border); }

/* ---- Section Styles ---- */
section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}
.section-sub { color: var(--text-secondary); font-size: 17px; }

/* ---- Features ---- */
.features-section { background: rgba(255,255,255,0.02); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}
.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.feature-icon { font-size: 36px; margin-bottom: 16px; display: block; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 15px; line-height: 1.7; }

/* ---- Pricing ---- */
.pricing-section { background: var(--bg); }
.recommend-badge {
  display: inline-flex;
  padding: 8px 20px;
  background: linear-gradient(135deg, rgba(255,107,107,0.15), rgba(255,165,0,0.15));
  border: 1px solid rgba(255,107,107,0.3);
  border-radius: 50px;
  font-size: 14px;
  color: #ffaa55;
  font-weight: 600;
  margin-top: 16px;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  transition: var(--transition);
  overflow: hidden;
}
.pricing-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.pricing-card.featured {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(108,99,255,0.15), rgba(0,201,255,0.08));
  transform: scale(1.02);
}
.pricing-card.featured:hover { transform: scale(1.02) translateY(-4px); }
.pricing-card.flagship {
  background: linear-gradient(135deg, rgba(255,107,107,0.08), rgba(255,165,0,0.05));
  border-color: rgba(255,107,107,0.3);
}
.featured-ribbon {
  position: absolute;
  top: 16px;
  right: -22px;
  background: var(--gradient);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 5px 32px 5px 16px;
  transform: rotate(45deg) translateY(-8px);
  transform-origin: top right;
  right: -20px;
  top: 20px;
}
.plan-tags { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.tag {
  font-size: 11px;
  padding: 3px 10px;
  background: rgba(108,99,255,0.15);
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text-secondary);
  font-weight: 500;
}
.plan-name { font-size: 22px; font-weight: 700; margin-bottom: 16px; }
.plan-price { display: flex; align-items: baseline; gap: 2px; margin-bottom: 18px; }
.currency { font-size: 22px; font-weight: 700; color: var(--primary-light); }
.amount { font-size: 48px; font-weight: 800; line-height: 1; color: var(--text-primary); }
.period { font-size: 16px; color: var(--text-secondary); }
.plan-specs { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.spec {
  font-size: 13px;
  padding: 4px 12px;
  background: rgba(255,255,255,0.06);
  border-radius: 50px;
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.08);
}
.plan-note { font-size: 12px; color: var(--text-muted); margin-top: 10px; text-align: center; }
.pricing-notes {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 24px 32px;
  background: rgba(108,99,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.note-item { font-size: 15px; color: var(--text-secondary); font-weight: 500; }

/* ---- Articles ---- */
.articles-section { background: rgba(255,255,255,0.02); }
.articles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; }
.article-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
.article-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateX(4px);
  box-shadow: var(--shadow);
}
.article-icon { font-size: 32px; flex-shrink: 0; }
.article-content { flex: 1; min-width: 0; }
.article-cat { font-size: 11px; color: var(--secondary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.article-content h3 { font-size: 16px; font-weight: 700; margin: 4px 0 6px; line-height: 1.4; }
.article-content p { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }
.article-arrow { color: var(--primary-light); font-size: 18px; flex-shrink: 0; transition: var(--transition); }
.article-card:hover .article-arrow { transform: translateX(4px); }

/* ---- Reviews ---- */
.reviews-section { background: var(--bg); }
.rating-overview {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 24px;
}
.big-rating {
  font-size: 72px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.stars { font-size: 24px; color: #ffd700; letter-spacing: 2px; }
.rating-count { font-size: 14px; color: var(--text-secondary); margin-top: 4px; }
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; margin-top: 50px; }
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.review-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.reviewer-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}
.reviewer-name { font-size: 15px; font-weight: 600; }
.reviewer-date { font-size: 12px; color: var(--text-muted); margin-top: 1px; }
.review-stars { color: #ffd700; font-size: 14px; margin-left: auto; letter-spacing: 1px; }
.review-tag { font-size: 12px; color: var(--primary-light); font-weight: 500; margin-bottom: 12px; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ---- FAQ ---- */
.faq-section { background: rgba(255,255,255,0.02); }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.active { border-color: var(--primary); }
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 28px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  gap: 12px;
}
.faq-q:hover { color: var(--primary-light); }
.faq-icon { font-size: 22px; color: var(--primary-light); transition: var(--transition); flex-shrink: 0; }
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 28px;
}
.faq-item.active .faq-a { max-height: 600px; padding: 0 28px 24px; }
.faq-a p { color: var(--text-secondary); font-size: 15px; line-height: 1.8; margin-bottom: 10px; }
.faq-a ul, .faq-a ol { color: var(--text-secondary); font-size: 15px; line-height: 1.8; padding-left: 24px; }
.faq-a li { margin-bottom: 4px; }
.faq-a strong { color: var(--text-primary); }
.faq-a a { color: var(--primary-light); text-decoration: underline; }
.faq-cta { text-align: center; margin-top: 48px; }
.faq-cta p { color: var(--text-secondary); margin-bottom: 16px; font-size: 16px; }

/* ---- CTA Section ---- */
.cta-section {
  background: linear-gradient(135deg, rgba(108,99,255,0.2), rgba(0,201,255,0.1));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 100px 0;
}
.cta-inner { text-align: center; }
.cta-inner h2 { font-size: clamp(28px, 4vw, 44px); font-weight: 800; margin-bottom: 16px; }
.cta-inner p { font-size: 17px; color: var(--text-secondary); margin-bottom: 36px; }
.cta-note { margin-top: 16px; font-size: 14px; color: var(--text-muted); }

/* ---- Footer ---- */
.footer { background: #060614; padding: 80px 0 32px; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-logo { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
.footer-brand p { color: var(--text-muted); font-size: 14px; line-height: 1.7; margin-bottom: 20px; }
.footer-social a { color: var(--text-secondary); text-decoration: none; font-size: 14px; }
.footer-social a:hover { color: var(--primary-light); }
.footer-links h4 { font-size: 14px; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); letter-spacing: 0.5px; text-transform: uppercase; }
.footer-links ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 14px; transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; text-align: center; }
.footer-bottom p { color: var(--text-muted); font-size: 13px; }
.footer-bottom a { color: var(--text-secondary); text-decoration: none; }

/* ---- Article Pages ---- */
.article-page-hero {
  padding: 120px 0 60px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}
.article-page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10,10,26,0.4);
}
.article-page-hero .container { position: relative; z-index: 1; }
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.article-breadcrumb a { color: var(--primary-light); text-decoration: none; }
.article-page-hero h1 { font-size: clamp(26px, 4vw, 44px); font-weight: 800; margin-bottom: 16px; }
.article-meta { display: flex; gap: 16px; font-size: 13px; color: var(--text-muted); flex-wrap: wrap; }
.article-body {
  max-width: 820px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}
.article-body h2 { font-size: 24px; font-weight: 700; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.article-body h3 { font-size: 19px; font-weight: 600; margin: 30px 0 12px; color: var(--primary-light); }
.article-body p { color: var(--text-secondary); font-size: 16px; line-height: 1.9; margin-bottom: 18px; }
.article-body ul, .article-body ol { color: var(--text-secondary); padding-left: 28px; margin-bottom: 18px; }
.article-body li { font-size: 16px; line-height: 1.9; margin-bottom: 6px; }
.article-body strong { color: var(--text-primary); }
.article-body a { color: var(--primary-light); text-decoration: underline; }
.article-cta-box {
  background: linear-gradient(135deg, rgba(108,99,255,0.15), rgba(0,201,255,0.08));
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  margin: 40px 0;
}
.article-cta-box h3 { font-size: 22px; margin-bottom: 10px; }
.article-cta-box p { color: var(--text-secondary); margin-bottom: 20px; }
.article-related { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; margin-top: 40px; }
.article-related h3 { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.article-related ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.article-related a { color: var(--primary-light); text-decoration: none; font-size: 15px; display: flex; align-items: center; gap: 8px; }
.article-related a::before { content: '→'; color: var(--primary); }
.article-related a:hover { color: #fff; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; margin-left: auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .pricing-card.featured { transform: none; }
}
@media (max-width: 600px) {
  .hero-stats { gap: 16px; padding: 20px 24px; }
  .stat-divider { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
  section { padding: 70px 0; }
}