/* ==========================================================================
   阿达西机场 AdaxiCloud - 官方落地页样式表 (css/style.css)
   支持 100% 响应式移动端自适应、现代玻璃拟态与 SEO 优化呈现
   ========================================================================== */

:root {
  --bg-dark: #090d16;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(56, 189, 248, 0.3);
  
  --primary: #38bdf8;
  --primary-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  --accent-pink: #f472b6;
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --text-muted: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-glow: 0 10px 30px -10px rgba(56, 189, 248, 0.25);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  scroll-behavior: smooth;
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #1e1b4b 0%, #090d16 70%);
  min-height: 100vh;
}

/* 常用容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-padding {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 50px auto;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 20px;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

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

/* 按钮基础组件 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary-gradient);
  color: #fff;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: var(--shadow-glow);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px -5px rgba(56, 189, 248, 0.4);
  opacity: 0.95;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  font-weight: 600;
  padding: 13px 28px;
  border-radius: 50px;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-highlight);
  color: #fff;
}

/* ==========================================================================
   Header Navbar & Floating Dock
   ========================================================================== */
.header-dock {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: 1140px;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.2rem;
}

.brand-logo img {
  width: 36px;
  height: 36px;
}

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

.nav-links a {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
}

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

/* 移动端菜单控制按钮 */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding-top: 170px;
  padding-bottom: 80px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 6px 16px;
  border-radius: 30px;
  font-size: 0.88rem;
  color: var(--primary);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-sub);
  margin-bottom: 36px;
  line-height: 1.7;
}

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

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

.metric-item .val {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--primary);
}

.metric-item .lbl {
  font-size: 0.85rem;
  color: var(--text-sub);
}

/* Hero Visual Box */
.hero-card-visual {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(12px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  position: relative;
}

.card-header-glow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.server-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.server-status-tag {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.hero-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: rgba(255, 255, 255, 0.03);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.hero-feature-list .icon {
  font-size: 1.3rem;
  line-height: 1;
}

.hero-feature-list strong {
  color: var(--text-main);
  display: block;
  font-size: 0.95rem;
}

.hero-feature-list span {
  font-size: 0.85rem;
  color: var(--text-sub);
}

/* ==========================================================================
   Realtime Monitor Section
   ========================================================================== */
.ping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.ping-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}

.ping-item:hover {
  border-color: var(--border-highlight);
  transform: translateY(-2px);
}

.ping-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ping-flag {
  font-size: 1.8rem;
}

.ping-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.ping-detail {
  font-size: 0.8rem;
  color: var(--text-sub);
}

.ping-badge {
  text-align: right;
}

.ping-val {
  font-family: monospace;
  font-weight: 700;
  color: #10b981;
  font-size: 0.95rem;
}

.ping-bar-bg {
  width: 60px;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  margin-top: 4px;
  overflow: hidden;
}

.ping-bar-fill {
  height: 100%;
  background: #10b981;
}

/* ==========================================================================
   Bento Grid Section (Core Advantages)
   ========================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

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

.bento-card.span-2 {
  grid-column: span 2;
}

.bento-icon {
  width: 52px;
  height: 52px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.bento-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;

}

.bento-card p {
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.6;
}

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

.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;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.pricing-card.featured {
  border-color: rgba(56, 189, 248, 0.5);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.9) 100%);
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.15);
}

.featured-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.plan-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.plan-subtitle {
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 24px;
  min-height: 40px;
}

.plan-price {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text-main);
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
}

.plan-price span.currency {
  font-size: 1.4rem;
  color: var(--primary);
}

.plan-price span.period {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-sub);
}

.plan-features li .check {
  color: #10b981;
  font-weight: 800;
}

/* ==========================================================================
   SEO Articles Section
   ========================================================================== */
.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: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

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

.article-tag {
  font-size: 0.78rem;
  color: var(--primary);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.article-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
  color: var(--text-main);
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-bottom: 20px;
  line-height: 1.6;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.read-more-link {
  color: var(--primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   User Reviews & Testimonials Section
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: #fbbf24;
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.review-content {
  font-size: 0.95rem;
  color: var(--text-sub);
  margin-bottom: 20px;
  line-height: 1.6;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  font-size: 1.1rem;
}

.user-name {
  font-weight: 700;
  font-size: 0.95rem;
}

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

/* ==========================================================================
   FAQ Section (Accordion)
   ========================================================================== */
.faq-list {
  max-width: 860px;
  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: var(--transition);
}

.faq-item.active {
  border-color: var(--border-highlight);
}

.faq-question {
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.05rem;
  user-select: none;
}

.faq-toggle-icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  color: var(--primary);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 28px;
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 28px 24px 28px;
  transition: max-height 0.3s ease-in-out;
}

/* ==========================================================================
   Footer Section & Low-key PBN Backlink Pipeline (Core Task 2)
   ========================================================================== */
footer.site-footer {
  background: rgba(5, 8, 15, 0.95);
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px 0;
  text-align: center;
  position: relative;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text-main);
}

.footer-brand img {
  width: 28px;
  height: 28px;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
}

.footer-nav a {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

/* 【核心任务 2】低调、美观、小字号友情链接区（精准 PBN 权重输血管道） */
.friend-links-zone {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px dashed rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.friend-links-title {
  font-weight: 500;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.friend-links-group {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.friend-links-group a {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.82rem;
  transition: var(--transition);
}

.friend-links-group a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.footer-copyright {
  margin-top: 15px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Responsive Adaptations (Mobile & Tablet)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .bento-grid {
    grid-template-columns: 1fr;
  }
  
  .bento-card.span-2 {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  .header-dock {
    top: 12px;
    width: calc(100% - 24px);
    padding: 10px 18px;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    margin-top: 10px;
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.6);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-desc {
    font-size: 1rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .section-title {
    font-size: 1.7rem;
  }
  
  .articles-grid, .reviews-grid, .pricing-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Article Detail Page Specific Styles
   ========================================================================== */
.article-header {
  padding-top: 150px;
  padding-bottom: 40px;
  text-align: center;
  max-width: 840px;
  margin: 0 auto;
}

.article-header h1 {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 20px;
}

.article-post-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  color: var(--text-sub);
  font-size: 0.9rem;
}

.article-content-body {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  color: #cbd5e1;
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-content-body h2 {
  font-size: 1.6rem;
  color: var(--text-main);
  margin: 36px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-content-body h3 {
  font-size: 1.3rem;
  color: var(--primary);
  margin: 28px 0 12px 0;
}

.article-content-body p {
  margin-bottom: 20px;
}

.article-content-body ul, .article-content-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

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

.article-cta-box {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(129, 140, 248, 0.1) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 40px 0;
  text-align: center;
}

.article-cta-box h3 {
  color: var(--text-main);
  margin-top: 0;
  font-size: 1.4rem;
}

.article-cta-box p {
  color: var(--text-sub);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.related-articles-section {
  max-width: 860px;
  margin: 60px auto 0 auto;
}