/* ==========================================================================
   WgetCloud Official Landing Page Stylesheet (wget-yun.homes)
   Pure Native CSS - Zero Heavy Frameworks - Blazing Fast Instant Load
   Aesthetic: Cyber Deep Space & Electric Azure Glow
   ========================================================================== */

/* --- CSS Variables & Root Theme --- */
:root {
  --bg-dark: #070b13;
  --bg-card: rgba(14, 22, 38, 0.72);
  --bg-card-hover: rgba(20, 32, 54, 0.85);
  --bg-card-border: rgba(56, 189, 248, 0.16);
  --bg-card-border-hover: rgba(56, 189, 248, 0.45);
  
  --primary: #00f2fe;
  --primary-glow: rgba(0, 242, 254, 0.35);
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Base Reset & Box Sizing --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* --- Dynamic Background Canvas & Ambient Mesh --- */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 1;
}

.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.45;
  animation: floatAmbient 18s ease-in-out infinite alternate;
}

.ambient-glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.25) 0%, rgba(59, 130, 246, 0.08) 60%, transparent 80%);
  top: -100px;
  left: 10%;
}

.ambient-glow-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.22) 0%, rgba(37, 99, 235, 0.08) 60%, transparent 80%);
  top: 35%;
  right: -100px;
  animation-delay: -6s;
}

.ambient-glow-3 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.18) 0%, rgba(59, 130, 246, 0.05) 60%, transparent 80%);
  bottom: 5%;
  left: 5%;
  animation-delay: -12s;
}

@keyframes floatAmbient {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.08); }
  100% { transform: translate(-30px, -20px) scale(0.95); }
}

/* Page Wrapper for high z-index */
.page-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* --- Common Typography & Badges --- */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.gradient-text {
  background: linear-gradient(135deg, #ffe29a 0%, #ffa726 30%, #ff7043 70%, #ff3d00 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 2px 18px rgba(255, 112, 67, 0.35));
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #ffa726;
  background: rgba(255, 140, 0, 0.08);
  border: 1px solid rgba(255, 152, 0, 0.3);
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  box-shadow: 0 0 20px rgba(255, 109, 0, 0.18);
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #ffa726 0%, #ff6d00 50%, #f4511e 100%);
  color: #ffffff;
  box-shadow: 0 6px 22px rgba(255, 109, 0, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  border: 1px solid rgba(255, 183, 77, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #ffb74d 0%, #ff7d1a 50%, #ff3d00 100%);
  box-shadow: 0 8px 30px rgba(255, 109, 0, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  color: #ffffff;
}

.btn-outline {
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-main);
  border: 1px solid rgba(56, 189, 248, 0.35);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(0, 242, 254, 0.1);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 15px 32px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-block {
  width: 100%;
}

/* --- Navigation Bar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(7, 11, 19, 0.78);
  border-bottom: 1px solid rgba(56, 189, 248, 0.12);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(7, 11, 19, 0.94);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo img {
  display: block;
  height: 40px;
  width: auto;
  max-width: 220px;
}

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

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent-blue));
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
}

/* --- Hero Section --- */
.hero-section {
  padding: 70px 0 60px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(14, 22, 38, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  color: #e2e8f0;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.ping-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  position: relative;
  display: inline-block;
}

.ping-dot::after {
  content: '';
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border: 2px solid var(--accent-green);
  border-radius: 50%;
  animation: ping 1.8s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes ping {
  75%, 100% {
    transform: scale(2.2);
    opacity: 0;
  }
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 22px;
  letter-spacing: -0.03em;
}

.hero-desc {
  max-width: 820px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  padding-top: 10px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #cbd5e1;
  font-size: 0.92rem;
  font-weight: 500;
}

.trust-item svg {
  color: var(--primary);
}

/* --- Stats Grid Section --- */
.stats-section {
  padding: 20px 0 60px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--bg-card-border-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
  background: linear-gradient(135deg, #ffffff 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Core Features Grid --- */
.features-section {
  padding: 60px 0;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #ff7a18, transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 140, 0, 0.4);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45), 0 0 25px rgba(255, 109, 0, 0.1);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(255, 140, 0, 0.1);
  border: 1px solid rgba(255, 152, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #ffa726;
  box-shadow: 0 0 16px rgba(255, 109, 0, 0.14);
  transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon-wrap {
  background: rgba(255, 140, 0, 0.18);
  border-color: #ff9800;
  color: #ffb74d;
  box-shadow: 0 0 22px rgba(255, 109, 0, 0.32);
  transform: scale(1.05);
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* --- Nodes Speed & Status Section --- */
.nodes-section {
  padding: 60px 0;
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  transition: all var(--transition-fast);
}

.node-card:hover {
  border-color: var(--bg-card-border-hover);
  background: var(--bg-card-hover);
}

.node-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.node-flag {
  font-size: 1.8rem;
  line-height: 1;
}

.node-name {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 3px;
}

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

.node-ping {
  font-size: 0.88rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* ==========================================================================
   PRICING SECTION: STRICT HORIZONTAL ALIGNMENT IN ONE ROW ("所有价格要同排")
   Desktop view guarantees all 4 cards sit side-by-side in one row
   ========================================================================== */
.pricing-section {
  padding: 80px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  backdrop-filter: blur(14px);
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--bg-card-border-hover);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(28, 20, 16, 0.9) 0%, rgba(12, 16, 26, 0.96) 100%);
  border: 2px solid #ff7a18;
  box-shadow: 0 10px 40px rgba(255, 109, 0, 0.28);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 0 24px 50px rgba(255, 109, 0, 0.45);
}

.badge-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #ffa726, #ff5722);
  color: #ffffff;
  font-size: 0.76rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(255, 109, 0, 0.45);
}

.plan-header {
  margin-bottom: 20px;
  text-align: center;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.plan-subtitle {
  font-size: 0.84rem;
  color: var(--text-muted);
}

.plan-price-wrap {
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.plan-currency {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary);
  vertical-align: super;
}

.plan-price {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: #ffffff;
  letter-spacing: -0.03em;
}

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

.plan-features {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: #cbd5e1;
  margin-bottom: 12px;
  line-height: 1.45;
}

.plan-feature-item svg {
  flex-shrink: 0;
  color: var(--primary);
  margin-top: 2px;
}

.plan-feature-item.highlight strong {
  color: #ffffff;
}

.plan-cta {
  margin-top: auto;
}

/* --- Articles Section --- */
.articles-section {
  padding: 80px 0;
}

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

.article-preview-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

.article-preview-card:hover {
  transform: translateY(-5px);
  border-color: var(--bg-card-border-hover);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.article-card-body {
  padding: 26px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.article-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 140, 0, 0.1);
  border: 1px solid rgba(255, 152, 0, 0.28);
  color: #ffa726;
  font-weight: 600;
  font-size: 0.78rem;
  box-shadow: 0 0 10px rgba(255, 109, 0, 0.12);
}

.article-card-title {
  font-size: 1.15rem;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card-title a:hover {
  color: #ffa726;
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.article-read-more {
  font-size: 0.88rem;
  font-weight: 600;
  color: #ffa726;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition-fast);
}

.article-read-more:hover {
  color: #ffb74d;
  gap: 8px;
  text-shadow: 0 0 12px rgba(255, 140, 0, 0.4);
}

/* --- User Reviews Section (用户评价) --- */
.reviews-section {
  padding: 80px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(14, 22, 38, 0.4) 50%, transparent 100%);
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

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

.review-rating {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-quote {
  font-size: 0.94rem;
  color: #e2e8f0;
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-purple));
  color: #070b13;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.author-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
}

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

/* --- FAQ Section (常见问题) --- */
.faq-section {
  padding: 80px 0;
}

.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--bg-card-border-hover);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color var(--transition-fast);
}

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

.faq-icon {
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
  line-height: 1;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), padding 0.35s ease;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 24px 22px;
}

/* --- Bottom CTA Banner --- */
.cta-banner-section {
  padding: 60px 0 90px;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(14, 30, 60, 0.9) 0%, rgba(20, 42, 82, 0.85) 50%, rgba(14, 22, 38, 0.9) 100%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.cta-banner-title {
  font-size: 2.3rem;
  margin-bottom: 16px;
}

.cta-banner-desc {
  max-width: 680px;
  margin: 0 auto 32px;
  color: var(--text-muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

/* --- Footer & External Links (外链) --- */
.footer {
  background: rgba(4, 7, 13, 0.95);
  border-top: 1px solid rgba(56, 189, 248, 0.12);
  padding: 70px 0 30px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  margin-top: 16px;
  line-height: 1.7;
  color: var(--text-dim);
  max-width: 320px;
}

.footer-col-title {
  font-size: 1rem;
  color: #ffffff;
  margin-bottom: 18px;
  font-weight: 600;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

/* External Links Bar */
.external-links-section {
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 30px;
}

.external-links-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: #cbd5e1;
  margin-bottom: 12px;
}

.external-links-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ext-link-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: 0.82rem;
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.ext-link-badge:hover {
  color: var(--primary);
  border-color: rgba(0, 242, 254, 0.35);
  background: rgba(0, 242, 254, 0.06);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.84rem;
  color: var(--text-dim);
}

/* ==========================================================================
   RESPONSIVE DESIGN BREAKPOINTS
   Ensuring all 4 pricing plans stay strictly in one row on standard desktop (>= 1024px)
   ========================================================================== */
@media (max-width: 1200px) {
  .pricing-card {
    padding: 26px 18px;
  }
  .plan-name {
    font-size: 1.2rem;
  }
  .plan-price {
    font-size: 2.5rem;
  }
}

@media (max-width: 1023px) {
  /* Tablet / Smaller screens fallback */
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-desc {
    font-size: 1rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  
  .nav-links,
  .nav-actions {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(7, 11, 19, 0.98);
    border-bottom: 1px solid rgba(56, 189, 248, 0.2);
    padding: 20px;
    gap: 16px;
    backdrop-filter: blur(20px);
  }
  
  .features-grid,
  .articles-grid,
  .reviews-grid,
  .nodes-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-trust {
    gap: 16px;
    flex-direction: column;
    align-items: flex-start;
    max-width: 300px;
    margin: 0 auto;
  }
}