/* ==========================================================================
   UOCloud (uocloud.lol) Official Landing Page Stylesheet
   Pure Native CSS - Ultra Fast Loading, Zero External Dependencies
   ========================================================================== */

:root {
  --bg-dark: #070a12;
  --bg-deep: #0b111e;
  --bg-card: rgba(15, 23, 42, 0.72);
  --bg-card-hover: rgba(26, 38, 66, 0.88);
  --bg-card-featured: rgba(18, 30, 56, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.14);
  --border-glow: rgba(56, 189, 248, 0.45);
  
  --primary: #38bdf8;
  --primary-rgb: 56, 189, 248;
  --primary-dark: #0284c7;
  --secondary: #6366f1;
  --accent: #a855f7;
  --accent-cyan: #00f2fe;
  --accent-emerald: #10b981;
  --warning: #f59e0b;
  
  /* 冰红主题色系 (Ice Red) */
  --ice-red: #ff2a5f;
  --ice-red-light: #ff4d79;
  --ice-red-dark: #be123c;
  --ice-red-bg: rgba(255, 42, 95, 0.12);
  --ice-red-border: rgba(255, 42, 95, 0.36);
  --ice-red-glow: 0 0 32px rgba(255, 42, 95, 0.45);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px -5px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 35px rgba(56, 189, 248, 0.3);
  --shadow-purple: 0 0 35px rgba(168, 85, 247, 0.25);
  
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #0e172a 0%, var(--bg-dark) 72%);
}

/* Dynamic Particle / Celestial Background Canvas */
#dynamic-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.9;
}

/* Ambient Radial Glow Overlays */
.ambient-glow {
  position: fixed;
  width: 650px;
  height: 650px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(130px);
  opacity: 0.16;
}
.ambient-glow-1 {
  top: -160px;
  left: -160px;
  background: radial-gradient(circle, var(--accent-cyan) 0%, transparent 70%);
}
.ambient-glow-2 {
  top: 38%;
  right: -200px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
}
.ambient-glow-3 {
  bottom: 8%;
  left: 10%;
  background: radial-gradient(circle, var(--secondary) 0%, transparent 70%);
}

/* ==========================================================================
   Dynamic Majestic Cyber Leopard / Phantom Panther Stage (背景动态霸气神豹)
   ========================================================================== */
.dynamic-leopard-stage {
  position: absolute;
  top: 40px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1400px;
  height: 800px;
  pointer-events: none;
  z-index: 1;
  overflow: visible;
  display: flex;
  align-items: center;
  justify-content: center;
}

.leopard-aura-flare {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 480px;
  background: radial-gradient(ellipse at center, rgba(0, 242, 254, 0.28) 0%, rgba(99, 102, 241, 0.18) 45%, rgba(168, 85, 247, 0.09) 65%, transparent 80%);
  filter: blur(95px);
  border-radius: 50%;
  pointer-events: none;
  animation: aura-breathe 6s ease-in-out infinite alternate;
}

.leopard-container {
  position: relative;
  width: 1100px;
  max-width: 96vw;
  animation: leopard-float 6s ease-in-out infinite alternate;
  transform-origin: center center;
  transition: transform 0.18s cubic-bezier(0.1, 0.9, 0.2, 1);
  will-change: transform;
}

.leopard-art {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  -webkit-mask-image: radial-gradient(ellipse 72% 65% at 50% 48%, #000 30%, rgba(0, 0, 0, 0.8) 55%, transparent 92%);
  mask-image: radial-gradient(ellipse 72% 65% at 50% 48%, #000 30%, rgba(0, 0, 0, 0.8) 55%, transparent 92%);
  filter: drop-shadow(0 0 35px rgba(0, 242, 254, 0.4)) drop-shadow(0 0 75px rgba(99, 102, 241, 0.3));
  opacity: 0.92;
  animation: leopard-pulse-glow 5s ease-in-out infinite alternate;
}

/* Dynamic Breathing / Muscular Prowl Floating */
@keyframes leopard-float {
  0% {
    transform: translateY(0px) rotate(0deg) scale(1);
  }
  50% {
    transform: translateY(-15px) rotate(-0.6deg) scale(1.018);
  }
  100% {
    transform: translateY(-8px) rotate(0.8deg) scale(1.008);
  }
}

/* Pulsing Ethereal Neon Glow */
@keyframes leopard-pulse-glow {
  0% {
    filter: drop-shadow(0 0 20px rgba(0, 242, 254, 0.35)) drop-shadow(0 0 45px rgba(99, 102, 241, 0.25));
    opacity: 0.82;
  }
  100% {
    filter: drop-shadow(0 0 38px rgba(0, 242, 254, 0.65)) drop-shadow(0 0 85px rgba(168, 85, 247, 0.45));
    opacity: 0.96;
  }
}

@keyframes aura-breathe {
  0% {
    transform: scale(0.92) translate(-15px, 0);
    opacity: 0.75;
  }
  100% {
    transform: scale(1.18) translate(20px, -12px);
    opacity: 1;
  }
}

/* Page Layout */
.page-wrapper {
  position: relative;
  z-index: 1;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Typography & Utilities */
h1, h2, h3, h4, h5, h6 {
  color: #ffffff;
  font-weight: 700;
  line-height: 1.25;
}

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

.gradient-text {
  background: linear-gradient(135deg, #ffffff 15%, #38bdf8 65%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-cyan {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   Header & Navbar (Logo Top Left)
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(7, 10, 18, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.5px;
}

.brand-logo img {
  height: 44px;
  width: auto;
  display: block;
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

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

.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: 1px solid var(--border-color);
  color: #ffffff;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.1rem;
}

/* ==========================================================================
   Buttons & CTA Elements
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-md {
  padding: 12px 24px;
  font-size: 0.96rem;
}

.btn-lg {
  padding: 15px 32px;
  font-size: 1.05rem;
}

.btn-primary {
  background: linear-gradient(135deg, #be123c 0%, #ff2a5f 50%, #ff4d6d 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(255, 42, 95, 0.45);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 42, 95, 0.7);
  filter: brightness(1.12);
}

.btn-glow {
  animation: pulse-glow 3s infinite alternate;
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 16px rgba(255, 42, 95, 0.4); }
  100% { box-shadow: 0 0 32px rgba(255, 42, 95, 0.75); }
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px;
  background: rgba(255, 42, 95, 0.12);
  border: 1px solid rgba(255, 42, 95, 0.38);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  color: #ff4d79;
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 14px var(--accent-emerald); }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 850;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
  line-height: 1.15;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.95), 0 0 40px rgba(7, 10, 18, 0.95);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: #e2e8f0;
  max-width: 820px;
  margin: 0 auto 30px;
  line-height: 1.7;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.95);
}

/* Keyword Cloud Tag Pills */
.hero-keywords-tag {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 900px;
  margin: 0 auto 35px;
}

.keyword-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: #cbd5e1;
  transition: var(--transition);
}

.keyword-chip:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--primary);
  transform: translateY(-2px);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 45px;
}

.hero-trust-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.trust-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffffff;
  font-family: var(--font-mono);
  line-height: 1.2;
}

.trust-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  color: #a5b4fc;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.35rem;
  letter-spacing: -0.8px;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

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

.feature-card {
  padding: 32px 26px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: var(--shadow-md), 0 0 25px rgba(56, 189, 248, 0.12);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: var(--primary);
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.feature-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Node Distribution & Live Latency Matrix
   ========================================================================== */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.node-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.node-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  background: var(--bg-card-hover);
}

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

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

.node-name {
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
}

.node-type {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.node-status {
  text-align: right;
}

.node-ping {
  font-size: 0.92rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-emerald);
}

.node-status-badge {
  font-size: 0.72rem;
  display: inline-block;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  margin-top: 2px;
}

/* ==========================================================================
   PRICING SECTION: STRICT HORIZONTAL SAME ROW (所有价格要同排)
   ========================================================================== */
.pricing-section {
  background: linear-gradient(180deg, rgba(11, 17, 30, 0.5) 0%, rgba(7, 10, 18, 0.9) 100%);
  position: relative;
}

/* All 4 pricing cards strictly in one horizontal row on desktop */
.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch; /* Guarantees exact equal height */
}

.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 34px 22px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: var(--shadow-md), 0 0 25px rgba(56, 189, 248, 0.2);
}

/* Featured / Popular Card (人气畅享版 - 冰红至尊高亮) */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(45, 14, 28, 0.94) 0%, rgba(20, 12, 22, 0.97) 100%);
  border: 2px solid #ff2a5f;
  box-shadow: 0 0 35px rgba(255, 42, 95, 0.45), 0 10px 30px rgba(0, 0, 0, 0.6);
  transform: scale(1.02);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-8px);
  border-color: #ff4d79;
  box-shadow: 0 0 45px rgba(255, 42, 95, 0.65), 0 15px 35px rgba(0, 0, 0, 0.7);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #be123c 0%, #ff2a5f 100%);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(255, 42, 95, 0.55);
  white-space: nowrap;
}

.pricing-card.featured .plan-badge {
  background: rgba(255, 42, 95, 0.16) !important;
  color: #ff7597 !important;
  border: 1px solid rgba(255, 42, 95, 0.35);
}

.pricing-card.featured .price-currency {
  color: #ff2a5f;
}

.pricing-card.featured .plan-discount-tag {
  color: #ff4d79;
  background: rgba(255, 42, 95, 0.14);
  border: 1px solid rgba(255, 42, 95, 0.3);
}

.pricing-header {
  text-align: center;
  margin-bottom: 22px;
}

.plan-name {
  font-size: 1.35rem;
  margin-bottom: 8px;
}

.plan-badge {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.plan-price-box {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 6px;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: #38bdf8;
}

.price-amount {
  font-size: 2.8rem;
  font-weight: 850;
  color: #ffffff;
  line-height: 1;
  font-family: var(--font-mono);
}

.price-period {
  font-size: 0.92rem;
  color: var(--text-dim);
}

.plan-discount-tag {
  display: inline-block;
  font-size: 0.76rem;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.08);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.pricing-divider {
  height: 1px;
  background: var(--border-color);
  margin: 18px 0;
}

.plan-specs {
  list-style: none;
  margin-bottom: 26px;
}

.spec-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 11px;
  line-height: 1.45;
}

.spec-item.highlight {
  color: #f1f5f9;
  font-weight: 500;
}

.check-icon {
  color: var(--accent-emerald);
  font-weight: 800;
  font-size: 0.95rem;
  line-height: 1.2;
}

.pricing-card-footer {
  margin-top: auto;
}

/* ==========================================================================
   Articles Showcase Section
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 42, 95, 0.45);
  box-shadow: var(--shadow-md), 0 0 24px rgba(255, 42, 95, 0.22);
}

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

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

.article-tag {
  color: #ff4d79;
  background: rgba(255, 42, 95, 0.12);
  border: 1px solid rgba(255, 42, 95, 0.28);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  display: inline-block;
  transition: var(--transition);
}

.article-card:hover .article-tag {
  background: rgba(255, 42, 95, 0.22);
  border-color: rgba(255, 42, 95, 0.5);
  color: #ff7597;
}

.article-title {
  font-size: 1.18rem;
  line-height: 1.4;
  margin-bottom: 12px;
  color: #ffffff;
}

.article-title a:hover {
  color: #ff4d79;
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #ff2a5f;
  transition: var(--transition);
}

.article-link-more:hover {
  color: #ff6688;
  gap: 10px;
}

/* ==========================================================================
   User Reviews / Testimonials Section (用户评价)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.review-stars {
  color: #fbbf24;
  font-size: 1.05rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-content {
  font-size: 0.94rem;
  color: #cbd5e1;
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.review-speed-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  align-self: flex-start;
}

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

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 1rem;
}

.author-meta h4 {
  font-size: 0.92rem;
  color: #ffffff;
  margin-bottom: 2px;
}

.author-meta p {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ==========================================================================
   FAQ Section (常见问题FAQ)
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  background: var(--bg-card);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 42, 95, 0.35);
}

.faq-item.active {
  border-color: rgba(255, 42, 95, 0.55);
  background: rgba(30, 16, 26, 0.88);
  box-shadow: 0 0 25px rgba(255, 42, 95, 0.18);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 600;
  font-family: inherit;
}

.faq-icon {
  font-size: 1.25rem;
  color: #ff2a5f;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.25s ease;
  flex-shrink: 0;
}

.faq-question:hover .faq-icon {
  color: #ff4d79;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: #ff2a5f;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

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

/* ==========================================================================
   External Links / Authority Resources (做好外链)
   ========================================================================== */
.external-links-section {
  padding: 50px 0;
  background: rgba(11, 17, 30, 0.4);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.ext-links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.ext-link-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  color: #cbd5e1;
  font-size: 0.88rem;
  transition: var(--transition);
}

.ext-link-card:hover {
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #04060a;
  border-top: 1px solid var(--border-color);
  padding: 65px 0 35px;
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  color: #ffffff;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--primary);
}

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

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

.footer-links a {
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1200px) {
  .pricing-grid-same-row {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }
  .pricing-card {
    padding: 26px 16px;
  }
  .price-amount {
    font-size: 2.3rem;
  }
}

@media (max-width: 992px) {
  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-links.mobile-active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background: rgba(7, 10, 18, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    gap: 16px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid-same-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ext-links-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2.3rem;
  }
  .hero-trust-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .nodes-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid-same-row {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .ext-links-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}