/* ==========================================================================
   咕嘎云 (Guga Cloud) - 2026 极速网络加速平台 核心样式表
   Design Language: Futuristic Cyberpunk Dark (#0A0A0F) + Cyan (#00F0FF) & Purple (#8B5CF6)
   Native CSS - Zero Frameworks - Lightning Fast Performance
   ========================================================================== */

:root {
  --bg-dark: #0A0A0F;
  --bg-card: rgba(18, 18, 26, 0.75);
  --bg-card-hover: rgba(26, 26, 38, 0.85);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-neon: rgba(0, 240, 255, 0.35);
  --border-purple: rgba(139, 92, 246, 0.35);
  
  --cyan: #00F0FF;
  --cyan-glow: rgba(0, 240, 255, 0.45);
  --purple: #8B5CF6;
  --purple-glow: rgba(139, 92, 246, 0.45);
  --accent-pink: #EC4899;
  
  --text-main: #F3F4F6;
  --text-muted: #9CA3AF;
  --text-sub: #6B7280;
  
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, Monaco, monospace;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1200px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  background-color: var(--bg-dark);
}

/* ==========================================================================
   背景网格与粒子动效 (Animated Dot-Grid & Ambient Glow)
   ========================================================================== */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    radial-gradient(rgba(0, 240, 255, 0.12) 1px, transparent 1px),
    radial-gradient(rgba(139, 92, 246, 0.08) 1px, transparent 1px);
  background-size: 36px 36px, 72px 72px;
  background-position: 0 0, 18px 18px;
  pointer-events: none;
  z-index: 0;
  animation: gridFloat 20s linear infinite;
}

@keyframes gridFloat {
  0% { transform: translateY(0); }
  100% { transform: translateY(36px); }
}

.mouse-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, rgba(139, 92, 246, 0.08) 40%, transparent 70%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  transition: opacity 0.5s ease;
  filter: blur(40px);
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  animation: floatOrb 12s ease-in-out infinite alternate;
}
.orb-1 {
  top: 10%;
  left: 5%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, var(--cyan-glow), transparent 70%);
}
.orb-2 {
  top: 40%;
  right: 5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--purple-glow), transparent 70%);
  animation-delay: -6s;
}

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

/* ==========================================================================
   页面容器与排版
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

section {
  padding: 100px 0;
  position: relative;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--border-neon);
  border-radius: 9999px;
  margin-bottom: 18px;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
  text-transform: uppercase;
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulseDot 2s infinite;
}
@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.section-title {
  font-size: 2.5rem;
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

.gradient-text {
  background: linear-gradient(135deg, #FFFFFF 20%, var(--cyan) 65%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-purple {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 50%, var(--accent-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   导航栏 (Header / Navbar)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(10, 10, 15, 0.78);
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition-smooth);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  color: #FFFFFF;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.45);
}

.logo-text {
  display: flex;
  flex-direction: column;
}
.logo-title {
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  background: linear-gradient(90deg, #FFFFFF, var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.logo-sub {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

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

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: var(--transition-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  transition: width 0.3s ease;
  border-radius: 2px;
  box-shadow: 0 0 8px var(--cyan);
}

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

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

.nav-link.highlight {
  color: var(--cyan);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link.highlight::before {
  content: '✦';
  font-size: 0.8rem;
  color: var(--cyan);
}

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

/* 移动端菜单按钮 */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #FFFFFF;
  cursor: pointer;
  padding: 8px;
}

/* ==========================================================================
   按钮系统 (Buttons)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-smooth);
  cursor: pointer;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #00F0FF 0%, #8B5CF6 100%);
  color: #0A0A0F;
  font-weight: 700;
  box-shadow: 0 4px 25px rgba(0, 240, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(0, 240, 255, 0.6);
  filter: brightness(1.1);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.6s ease;
}
.btn-primary:hover::before {
  left: 100%;
}

.btn-secondary {
  background: rgba(18, 18, 26, 0.85);
  color: #FFFFFF;
  border-color: var(--border-purple);
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.2);
}

.btn-secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0, 240, 255, 0.3);
}

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

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

.btn-glow-pulse {
  animation: btnGlow 3s infinite alternate;
}
@keyframes btnGlow {
  0% { box-shadow: 0 4px 20px rgba(0, 240, 255, 0.35); }
  100% { box-shadow: 0 4px 35px rgba(139, 92, 246, 0.65); }
}

/* ==========================================================================
   Hero 主视觉区
   ========================================================================== */
.hero-section {
  padding-top: 170px;
  padding-bottom: 110px;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 920px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 38px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-security-notes {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 70px;
}

.sec-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.sec-item svg {
  color: var(--cyan);
}

/* 实时动态计数器卡片 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 30px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.stats-bar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--purple), transparent);
}

.stat-item {
  text-align: center;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -10px;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border-glass);
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 6px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}
.stat-suffix {
  font-size: 1.4rem;
  color: var(--cyan);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
   产品核心优势卡片 (3D Tilt Cards)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.tilt-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 40px 32px;
  position: relative;
  transition: transform 0.2s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

.tilt-card:hover {
  border-color: var(--border-neon);
  box-shadow: 0 20px 45px -10px rgba(0, 240, 255, 0.25);
}

.card-icon-box {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--border-neon);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  margin-bottom: 24px;
  transition: var(--transition-smooth);
}
.tilt-card:hover .card-icon-box {
  background: var(--cyan);
  color: #0A0A0F;
  box-shadow: 0 0 25px var(--cyan);
}

.card-title {
  font-size: 1.35rem;
  margin-bottom: 14px;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.card-specs {
  list-style: none;
  border-top: 1px solid var(--border-glass);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.spec-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: #D1D5DB;
}
.spec-item svg {
  color: var(--cyan);
  flex-shrink: 0;
}

/* ==========================================================================
   流媒体与 AI 支持图卡
   ========================================================================== */
.ecosystem-section {
  position: relative;
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.ecosystem-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 38px;
  transition: var(--transition-smooth);
}
.ecosystem-card:hover {
  border-color: var(--purple);
  box-shadow: 0 15px 40px rgba(139, 92, 246, 0.25);
  transform: translateY(-4px);
}

.eco-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.eco-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid var(--border-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--purple);
}

.eco-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.eco-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 500;
  color: #E5E7EB;
  transition: var(--transition-smooth);
}
.eco-tag:hover {
  background: rgba(0, 240, 255, 0.12);
  border-color: var(--cyan);
  color: #FFFFFF;
}

/* ==========================================================================
   终端模拟区 (Terminal Code Section)
   ========================================================================== */
.terminal-wrapper {
  max-width: 900px;
  margin: 0 auto;
  border-radius: 16px;
  overflow: hidden;
  background: #0D0E15;
  border: 1px solid rgba(0, 240, 255, 0.25);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 30px rgba(0, 240, 255, 0.15);
  font-family: var(--font-mono);
}

.terminal-header {
  background: #151622;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-dots {
  display: flex;
  gap: 8px;
}
.term-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.term-dot.red { background: #FF5F56; }
.term-dot.yellow { background: #FFBD2E; }
.term-dot.green { background: #27C93F; }

.terminal-title {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: 24px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: #D1D5DB;
}

.term-line {
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.term-prompt {
  color: var(--cyan);
  font-weight: 700;
}
.term-cmd {
  color: #FFFFFF;
}
.term-res {
  color: var(--text-muted);
  padding-left: 20px;
}
.term-success {
  color: #10B981;
}
.term-latency {
  color: var(--cyan);
  font-weight: 700;
}
.term-purple {
  color: var(--purple);
}

/* ==========================================================================
   套餐价格对比表 (Pricing Section)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 22px;
  padding: 36px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
}

.price-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-neon);
  box-shadow: 0 20px 40px rgba(0, 240, 255, 0.2);
}

.price-card.popular {
  border-color: var(--purple);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.12) 0%, rgba(18, 18, 26, 0.9) 100%);
  box-shadow: 0 15px 45px rgba(139, 92, 246, 0.25);
  transform: scale(1.03);
}
.price-card.popular:hover {
  transform: scale(1.03) translateY(-8px);
  border-color: var(--cyan);
  box-shadow: 0 25px 55px rgba(0, 240, 255, 0.35);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  color: #0A0A0F;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 0 15px var(--cyan);
}

.plan-header {
  margin-bottom: 20px;
}
.plan-name {
  font-size: 1.3rem;
  margin-bottom: 8px;
}
.plan-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  min-height: 42px;
}

.plan-pricing {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-glass);
}
.price-currency {
  font-size: 1.25rem;
  color: var(--cyan);
  font-weight: 700;
}
.price-amount {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  color: #FFFFFF;
}
.price-period {
  font-size: 0.88rem;
  color: var(--text-sub);
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
  flex-grow: 1;
}
.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: #D1D5DB;
}
.plan-feature-item svg {
  color: var(--cyan);
  flex-shrink: 0;
}
.plan-feature-item.highlight-text {
  color: #FFFFFF;
  font-weight: 600;
}

.price-card .btn {
  width: 100%;
}

/* ==========================================================================
   用户真实评价 (Testimonials)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.test-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 30px;
  transition: var(--transition-smooth);
}
.test-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.test-stars {
  color: #FBBF24;
  margin-bottom: 14px;
  display: flex;
  gap: 4px;
}

.test-text {
  font-size: 0.95rem;
  color: #E5E7EB;
  line-height: 1.7;
  margin-bottom: 20px;
}

.test-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-glass);
  padding-top: 16px;
}
.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #0A0A0F;
}
.author-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: #FFFFFF;
}
.author-role {
  font-size: 0.78rem;
  color: var(--text-sub);
}

/* ==========================================================================
   常见问题解答 (FAQ Accordion)
   ========================================================================== */
.faq-wrapper {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition-smooth);
}
.faq-item:hover {
  border-color: rgba(0, 240, 255, 0.3);
}
.faq-item.active {
  border-color: var(--purple);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.15);
}

.faq-question {
  width: 100%;
  padding: 22px 28px;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  cursor: pointer;
  color: #FFFFFF;
  font-size: 1.05rem;
  font-weight: 600;
  font-family: var(--font-heading);
}
.faq-icon {
  width: 24px;
  height: 24px;
  color: var(--cyan);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--purple);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 28px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer {
  max-height: 260px;
  padding: 0 28px 24px 28px;
}

/* ==========================================================================
   底部极简规范页脚 (Footer - Only 4 Links Required)
   ========================================================================== */
.site-footer {
  background: #06060A;
  border-top: 1px solid var(--border-glass);
  padding: 50px 0 35px 0;
  position: relative;
  z-index: 2;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 24px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.98rem;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
}

.footer-nav-link:hover {
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan);
}

.footer-copyright {
  font-size: 0.84rem;
  color: var(--text-sub);
  font-family: var(--font-mono);
}

/* ==========================================================================
   资讯/文章页专属样式 (News & Blog Template)
   ========================================================================== */
.article-hero {
  padding-top: 140px;
  padding-bottom: 60px;
  text-align: center;
}
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 80px;
}
.article-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}
.article-card:hover {
  border-color: var(--cyan);
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 240, 255, 0.2);
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--text-sub);
  font-family: var(--font-mono);
  margin-bottom: 16px;
}
.article-tag {
  color: var(--cyan);
  background: rgba(0, 240, 255, 0.08);
  padding: 3px 10px;
  border-radius: 6px;
}
.article-title {
  font-size: 1.35rem;
  line-height: 1.4;
  margin-bottom: 16px;
  color: #FFFFFF;
}
.article-summary {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}
.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-glass);
  padding-top: 18px;
}
.read-more-btn {
  color: var(--cyan);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-smooth);
}
.read-more-btn:hover {
  gap: 10px;
  color: #FFFFFF;
}

/* 内页排版 (About, Terms, Privacy) */
.page-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 140px 24px 80px 24px;
  position: relative;
  z-index: 2;
}
.prose {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 48px;
}
.prose h1 {
  font-size: 2.2rem;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 16px;
}
.prose h2 {
  font-size: 1.45rem;
  margin: 36px 0 16px 0;
  color: var(--cyan);
}
.prose h3 {
  font-size: 1.15rem;
  margin: 24px 0 12px 0;
  color: #FFFFFF;
}
.prose p {
  color: #D1D5DB;
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 18px;
}
.prose ul, .prose ol {
  margin: 0 0 20px 24px;
  color: #D1D5DB;
}
.prose li {
  margin-bottom: 8px;
  line-height: 1.7;
}

/* ==========================================================================
   响应式断点 (Responsive Design - Mobile First / Single Column)
   ========================================================================== */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.98);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-glass);
    gap: 16px;
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.3rem;
  }
  .section-title {
    font-size: 1.9rem;
  }
  .features-grid,
  .ecosystem-grid,
  .pricing-grid,
  .testimonials-grid,
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 16px;
  }
  .stat-item:not(:last-child)::after {
    display: none;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .footer-nav {
    flex-direction: column;
    gap: 18px;
  }
  .prose {
    padding: 28px 20px;
  }
}

/* ==========================================================================
   滚动入场动画 (Fade Up)
   ========================================================================== */
.fade-up-element {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-up-element.visible {
  opacity: 1;
  transform: translateY(0);
}