/* ==========================================================================
   Mitce 机场 Landing Page - Master Stylesheet
   Domain: mitce.xyz
   ========================================================================== */

:root {
  --bg-dark: #090d16;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(59, 130, 246, 0.4);
  
  --primary-blue: #2563eb;
  --primary-hover: #1d4ed8;
  --cyan-accent: #06b6d4;
  --emerald-accent: #10b981;
  --purple-accent: #8b5cf6;
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-glow: 0 0 25px rgba(37, 99, 235, 0.25);
}

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

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

body {
  overflow-x: hidden;
  background: radial-gradient(circle at 50% -20%, #1e1b4b 0%, var(--bg-dark) 50%);
  min-height: 100vh;
}

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

/* Links & Buttons */
a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue), #3b82f6);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, var(--primary-blue));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.btn-recommend {
  background: linear-gradient(135deg, #8b5cf6, #ec4899);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.35);
}
.btn-recommend:hover {
  background: linear-gradient(135deg, #7c3aed, #db2777);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
}

/* Header & Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.logo-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a:hover {
  color: #ffffff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Top Notification Banner */
.top-bar-announce {
  background: linear-gradient(90deg, #1e3a8a, #065f46);
  color: #e0f2fe;
  font-size: 0.85rem;
  text-align: center;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 500;
}
.top-bar-announce a {
  text-decoration: underline;
  color: #ffffff;
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 100px 0 70px 0;
  text-align: center;
  background: radial-gradient(ellipse at top, rgba(37, 99, 235, 0.15), transparent 70%);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 40%, #93c5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px auto;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* Tier 1 Providers Logo Banner */
.tier1-providers {
  margin-top: 50px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.tier1-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--cyan-accent);
  margin-bottom: 24px;
  font-weight: 700;
}

.providers-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  max-width: 1000px;
  margin: 0 auto 36px auto;
}

.provider-card {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 30px;
  font-size: 0.9rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.5px;
  backdrop-filter: blur(8px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
}

.provider-card:hover {
  background: rgba(37, 99, 235, 0.15);
  border-color: var(--cyan-accent);
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.25);
}

.provider-svg {
  width: 18px;
  height: 18px;
  stroke: var(--cyan-accent);
  transition: transform 0.3s ease;
}

.provider-card:hover .provider-svg {
  transform: scale(1.15);
}

/* Global Stats Banner */
.hero-stats-banner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: linear-gradient(135deg, rgba(17, 24, 39, 0.8), rgba(30, 41, 59, 0.6));
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  margin-top: 30px;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  flex-wrap: wrap;
  gap: 20px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-num {
  font-size: 1.6rem;
  font-weight: 900;
  background: linear-gradient(135deg, #ffffff, var(--cyan-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
}

@media (max-width: 768px) {
  .stat-divider {
    display: none;
  }
  .hero-stats-banner {
    flex-direction: column;
    gap: 16px;
  }
}

/* Floating Notify Box */
.floating-notify {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  background: #2563eb;
  color: #ffffff;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.4);
  max-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9rem;
  animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
  from { transform: translateY(50px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.notify-btn {
  align-self: flex-start;
  background: #ffffff;
  color: #2563eb;
  font-weight: 700;
  font-size: 0.8rem;
  padding: 6px 14px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-tag {
  color: var(--cyan-accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  display: block;
}
.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
}

/* Pricing Grid */
.pricing-section {
  padding: 90px 0;
  position: relative;
}

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

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
}

.pricing-card.popular {
  border-color: var(--primary-blue);
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.15) 0%, var(--bg-card) 100%);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-blue);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 6px;
}
.plan-price span {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.plan-features {
  list-style: none;
  margin-bottom: 30px;
  flex: 1;
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-main);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

/* Feature Grid */
.features-section {
  padding: 90px 0;
  background: rgba(15, 23, 42, 0.4);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
}

.feature-icon {
  width: 50px;
  height: 50px;
  background: rgba(37, 99, 235, 0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--cyan-accent);
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #ffffff;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Articles Section */
.articles-section {
  padding: 90px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.article-tag {
  background: rgba(6, 182, 212, 0.15);
  color: var(--cyan-accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

.article-link {
  color: var(--cyan-accent);
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-link:hover {
  color: #ffffff;
}

/* Reviews Section (用户评价) */
.reviews-section {
  padding: 90px 0;
  background: rgba(15, 23, 42, 0.6);
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.review-stars {
  color: #f59e0b;
  font-size: 1rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-main);
  line-height: 1.6;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
}

.author-info h4 {
  font-size: 0.95rem;
  color: #ffffff;
}
.author-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* FAQ Section (常见问题) */
.faq-section {
  padding: 90px 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--cyan-accent);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
  content: "−";
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px 24px;
  transition: max-height 0.35s cubic-bezier(1, 0, 1, 0);
}

/* Article Detail Page Styles */
.article-page {
  padding: 60px 0 100px 0;
}
.article-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 45px;
  backdrop-filter: blur(10px);
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb a {
  color: var(--cyan-accent);
}

.article-content h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 20px;
  line-height: 1.3;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  margin: 32px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--cyan-accent);
  margin: 24px 0 12px 0;
}

.article-content p {
  font-size: 0.98rem;
  color: var(--text-main);
  line-height: 1.8;
  margin-bottom: 18px;
}

.article-content ul, .article-content ol {
  margin: 0 0 20px 24px;
  color: var(--text-main);
}
.article-content li {
  margin-bottom: 8px;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.2), rgba(6, 182, 212, 0.2));
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 40px 0;
  text-align: center;
}
.article-cta-box h3 {
  color: #ffffff;
  font-size: 1.3rem;
  margin-bottom: 10px;
}
.article-cta-box p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.internal-nav-box {
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}
.internal-nav-box h3 {
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 16px;
}
.internal-links-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  list-style: none;
  padding: 0;
}
.internal-links-list a {
  font-size: 0.88rem;
  color: var(--cyan-accent);
  display: block;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}
.internal-links-list a:hover {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--cyan-accent);
}

/* Footer & PBN Links (Core Task 2) */
footer {
  background: #050811;
  border-top: 1px solid var(--border-color);
  padding: 40px 0 30px 0;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
}
.footer-logo img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Low-key aesthetic small-font PBN friend links */
.footer-friend-links {
  font-size: 0.78rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 10px;
}

.footer-friend-links span {
  opacity: 0.6;
}

.footer-friend-links a {
  color: #818cf8;
  font-weight: 500;
  transition: color 0.2s ease, opacity 0.2s ease;
  opacity: 0.8;
}

.footer-friend-links a:hover {
  color: #a5b4fc;
  opacity: 1;
  text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .nav-links {
    display: none;
  }
  .article-container {
    padding: 24px;
  }
  .floating-notify {
    bottom: 15px;
    right: 15px;
    left: 15px;
    max-width: none;
  }
}