/* ==========================================================================
   Doggy Quantum Design System (狗狗加速官方设计规范)
   Palette: Deep Blue #070B18, Space #0D1631, Purple #7C3AED, Blue #2563EB, Cyan #22D3EE
   ========================================================================== */

:root {
  --bg-main: #070B18;
  --bg-deep: #0D1631;
  --bg-card: rgba(13, 22, 49, 0.72);
  --bg-card-hover: rgba(22, 34, 72, 0.82);
  --tech-purple: #7C3AED;
  --quantum-blue: #2563EB;
  --cyan-glow: #22D3EE;
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-sub: #64748B;
  --border-glass: rgba(37, 99, 235, 0.22);
  --border-glow: rgba(34, 211, 238, 0.42);
  --btn-gradient: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
  --btn-gradient-hover: linear-gradient(135deg, #1D4ED8 0%, #6D28D9 100%);
  --cyan-gradient: linear-gradient(135deg, #22D3EE 0%, #2563EB 100%);
  --shadow-quantum: 0 10px 30px -10px rgba(37, 99, 235, 0.35);
  --shadow-cyan: 0 0 25px rgba(34, 211, 238, 0.32);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", Consolas, Monaco, monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: dark;
}

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

body.splash-active {
  overflow: hidden;
}

/* Background Quantum Particles & Nebula Canvas */
#quantum-bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

/* Global Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.3;
}

a {
  color: var(--cyan-glow);
  text-decoration: none;
  transition: all 0.25s ease;
}

a:hover {
  color: #67E8F9;
  text-decoration: underline;
}

p {
  color: var(--text-muted);
}

.text-gradient {
  background: linear-gradient(135deg, #F8FAFC 20%, #22D3EE 60%, #A78BFA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-cyan {
  color: var(--cyan-glow);
}

/* Section Common Structure */
.section-wrapper {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid var(--border-glow);
  color: var(--cyan-glow);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-tag::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-glow);
  box-shadow: 0 0 8px var(--cyan-glow);
}

.section-title {
  font-size: clamp(2rem, 3.2vw, 2.75rem);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   01. Brand Opening Animation (Doggy Quantum Splash)
   ========================================================================== */
#quantum-splash {
  position: fixed;
  inset: 0;
  background-color: #040711;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.6s ease;
}

#quantum-splash.fade-out {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.splash-content {
  text-align: center;
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.splash-halo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.6);
  border: 2px dashed var(--cyan-glow);
  box-shadow: 0 0 45px rgba(34, 211, 238, 0.45);
  opacity: 0;
  transition: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
  animation: spinHalo 6s linear infinite;
}

.splash-halo.active {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.15);
}

@keyframes spinHalo {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.splash-logo-wrap {
  width: 110px;
  height: 110px;
  margin-bottom: 24px;
  opacity: 0;
  transform: scale(0.7);
  transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.splash-logo-wrap.active {
  opacity: 1;
  transform: scale(1);
}

.splash-logo-wrap img {
  width: 100%;
  height: 100%;
}

.splash-title-wrap {
  opacity: 0;
  transform: translateY(18px);
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.splash-title-wrap.active {
  opacity: 1;
  transform: translateY(0);
}

.splash-brand-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, #F8FAFC 0%, #22D3EE 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.splash-brand-sub {
  font-size: 0.92rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 6px;
}

.splash-globe-bg {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.28) 0%, rgba(124, 58, 237, 0.12) 50%, transparent 70%);
  opacity: 0;
  transform: scale(0.6);
  transition: all 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  z-index: 1;
}

.splash-globe-bg.active {
  opacity: 1;
  transform: scale(1.1);
}

.splash-skip-btn {
  position: absolute;
  bottom: 40px;
  padding: 8px 22px;
  border-radius: var(--radius-full);
  background: rgba(13, 22, 49, 0.85);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  z-index: 10;
  transition: all 0.25s ease;
}

.splash-skip-btn:hover {
  border-color: var(--cyan-glow);
  color: var(--text-main);
  background: rgba(37, 99, 235, 0.2);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 74px;
  background: rgba(7, 11, 24, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(37, 99, 235, 0.15);
  z-index: 1000;
  transition: background 0.3s ease, border-color 0.3s ease, height 0.3s ease;
}

.navbar.scrolled {
  height: 66px;
  background: rgba(7, 11, 24, 0.92);
  border-bottom: 1px solid var(--border-glass);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(37, 99, 235, 0.12);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.28);
}

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

.brand-meta {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

.brand-en {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--cyan-glow);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text-main);
  text-decoration: none;
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 36px;
  height: 36px;
  position: relative;
  z-index: 1002;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px auto;
  background-color: var(--text-main);
  transition: all 0.3s ease;
}

/* ==========================================================================
   Buttons with Magnetic Feedback & Soft Spring
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease, background 0.25s ease;
  border: none;
  text-decoration: none !important;
  user-select: none;
}

.btn:active {
  transform: scale(0.96) translateY(1px);
}

.btn-primary {
  background: var(--btn-gradient);
  color: #FFFFFF;
  box-shadow: var(--shadow-quantum);
}

.btn-primary:hover {
  background: var(--btn-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 34px -8px rgba(37, 99, 235, 0.55), 0 0 20px rgba(124, 58, 237, 0.4);
  color: #FFFFFF;
}

.btn-cyan {
  background: var(--cyan-gradient);
  color: #070B18;
  font-weight: 700;
  box-shadow: 0 8px 24px -6px rgba(34, 211, 238, 0.4);
}

.btn-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -4px rgba(34, 211, 238, 0.6);
  color: #070B18;
}

.btn-outline {
  background: rgba(13, 22, 49, 0.65);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
}

.btn-outline:hover {
  border-color: var(--cyan-glow);
  background: rgba(37, 99, 235, 0.15);
  transform: translateY(-2px);
  color: var(--cyan-glow);
}

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

/* ==========================================================================
   02. Hero Section with 3D Globe & Direct Brand Definition
   ========================================================================== */
.hero-section {
  padding: 140px 0 90px 0;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(13, 22, 49, 0.8);
  border: 1px solid var(--border-glow);
  margin-bottom: 24px;
}

.hero-pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 10px #10B981;
}

.hero-pill-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
}

.hero-title {
  font-size: clamp(2.4rem, 4.4vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.18;
  margin-bottom: 22px;
}

/* GEO Brand Definition paragraph (100 - 180 chars) */
.brand-definition-box {
  background: rgba(13, 22, 49, 0.65);
  border-left: 3px solid var(--cyan-glow);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}

.brand-definition-text {
  font-size: 1.02rem;
  color: #E2E8F0;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 38px;
}

.hero-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(37, 99, 235, 0.16);
}

.highlight-item {
  display: flex;
  flex-direction: column;
}

.highlight-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--cyan-glow);
  letter-spacing: -0.02em;
}

.highlight-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* 3D Globe Visual Container */
.hero-globe-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 480px;
}

.globe-canvas-box {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.floating-badge {
  position: absolute;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  background: rgba(13, 22, 49, 0.85);
  border: 1px solid var(--border-glow);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  z-index: 5;
  animation: floatBadge 4s ease-in-out infinite;
}

.badge-top-right {
  top: 12%;
  right: -5%;
  animation-delay: 0s;
}

.badge-bottom-left {
  bottom: 12%;
  left: -5%;
  animation-delay: 2s;
}

@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ==========================================================================
   03. Core Advantages (核心优势)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  position: relative;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), border-color 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan-glow), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-quantum);
}

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

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 22px;
  color: var(--cyan-glow);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   04. Global Nodes & Network Map (全球节点与线路介绍)
   ========================================================================== */
.network-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.network-globe-box {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 1;
  margin: 0 auto;
}

.nodes-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.node-region-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.25s ease;
}

.node-region-card:hover {
  border-color: var(--cyan-glow);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}

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

.region-flag {
  font-size: 1.5rem;
}

.region-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

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

.region-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ping-tag {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #10B981;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 600;
}

.speed-tag {
  font-size: 0.8rem;
  color: var(--cyan-glow);
  font-family: var(--font-mono);
}

/* ==========================================================================
   05. Service & Technology (服务技术介绍)
   ========================================================================== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  transition: all 0.3s ease;
}

.tech-card:hover {
  border-color: var(--tech-purple);
  box-shadow: 0 10px 30px -10px rgba(124, 58, 237, 0.35);
  transform: translateY(-4px);
}

.tech-tag-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(124, 58, 237, 0.18);
  border: 1px solid rgba(124, 58, 237, 0.4);
  color: #C4B5FD;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tech-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.tech-card p {
  font-size: 0.94rem;
  line-height: 1.7;
}

/* ==========================================================================
   06. Plans & Pricing (套餐价格 - 严格数据)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), border-color 0.3s ease, box-shadow 0.3s ease;
}

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

.pricing-card.popular {
  border: 2px solid var(--cyan-glow);
  background: rgba(13, 22, 49, 0.9);
  box-shadow: var(--shadow-cyan);
  transform: scale(1.03);
}

.pricing-card.popular:hover {
  transform: scale(1.03) translateY(-6px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 5px 18px;
  border-radius: var(--radius-full);
  background: var(--cyan-gradient);
  color: #070B18;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 4px 14px rgba(34, 211, 238, 0.5);
}

.pricing-header {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(37, 99, 235, 0.16);
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.plan-price-wrap {
  margin-top: 18px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cyan-glow);
}

.price-num {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}

.period {
  font-size: 1rem;
  color: var(--text-muted);
}

.unit-price-calc {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.85rem;
  color: #10B981;
  background: rgba(16, 185, 129, 0.12);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.features-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.features-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: #CBD5E1;
  margin-bottom: 14px;
}

.features-list li svg {
  flex-shrink: 0;
  color: var(--cyan-glow);
}

.plan-cta {
  width: 100%;
}

/* Pricing Policy Callout (7 days reminder, no auto renew) */
.pricing-notice-box {
  background: rgba(13, 22, 49, 0.65);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 48px;
}

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

.notice-icon {
  font-size: 1.6rem;
  color: var(--cyan-glow);
}

.notice-text h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.notice-text p {
  font-size: 0.88rem;
}

/* Semantic Comparison Table (for SEO & GEO) */
.comparison-table-wrap {
  overflow-x: auto;
  width: 100%;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 24px;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.comparison-table th, .comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(37, 99, 235, 0.14);
}

.comparison-table th {
  color: var(--text-main);
  font-weight: 700;
  background: rgba(37, 99, 235, 0.08);
}

.comparison-table td {
  color: var(--text-muted);
}

.comparison-table tr:hover td {
  background: rgba(37, 99, 235, 0.04);
}

/* ==========================================================================
   07. Client & Device Support (客户端及设备支持)
   ========================================================================== */
.devices-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
  margin-bottom: 40px;
}

.device-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: all 0.25s ease;
}

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

.device-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  display: inline-block;
}

.device-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.device-clients {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.device-seat-info {
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 22px 28px;
  text-align: center;
}

/* ==========================================================================
   08. Usage Scenarios (使用场景)
   ========================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: all 0.3s ease;
}

.scenario-card:hover {
  border-color: var(--cyan-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-quantum);
}

.scenario-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.scenario-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.scenario-card p {
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.scenario-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.scenario-tag {
  font-size: 0.78rem;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  background: rgba(37, 99, 235, 0.14);
  color: var(--cyan-glow);
}

/* ==========================================================================
   09. Setup Guide (使用指南 - 4步流程)
   ========================================================================== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  position: relative;
}

.step-number {
  position: absolute;
  top: 18px;
  right: 20px;
  font-size: 2.4rem;
  font-weight: 800;
  color: rgba(37, 99, 235, 0.18);
  line-height: 1;
}

.step-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid var(--border-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--cyan-glow);
  margin-bottom: 20px;
}

.step-card h3 {
  font-size: 1.18rem;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ==========================================================================
   10. Original Articles Reading Center (原创文章阅读中心)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-decoration: none !important;
}

.article-card:hover {
  border-color: var(--cyan-glow);
  transform: translateY(-5px);
  box-shadow: var(--shadow-quantum);
  background: var(--bg-card-hover);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.article-badge {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(124, 58, 237, 0.2);
  color: #C4B5FD;
  font-size: 0.78rem;
  font-weight: 600;
}

.article-read-time {
  font-size: 0.8rem;
  color: var(--text-sub);
}

.article-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  line-height: 1.45;
  color: var(--text-main);
  transition: color 0.2s ease;
}

.article-card:hover h3 {
  color: var(--cyan-glow);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-link-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--cyan-glow);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   11. Verified User Reviews (用户评价 - 真实来源)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
}

.review-source-tag {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid var(--border-glass);
  color: var(--cyan-glow);
  font-size: 0.78rem;
  margin-bottom: 16px;
  font-weight: 600;
}

.review-card blockquote {
  font-size: 0.96rem;
  color: #E2E8F0;
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
  font-style: normal;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(37, 99, 235, 0.15);
  padding-top: 16px;
}

.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--btn-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #FFFFFF;
  font-size: 0.9rem;
}

.reviewer-info h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.reviewer-info p {
  font-size: 0.8rem;
  color: var(--text-sub);
}

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

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.25s ease;
}

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

.faq-question {
  width: 100%;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.08rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  font-size: 1.3rem;
  color: var(--cyan-glow);
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 350px;
  padding: 0 24px 22px 24px;
}

/* ==========================================================================
   13. Footer
   ========================================================================== */
.footer {
  background: #040711;
  border-top: 1px solid rgba(37, 99, 235, 0.18);
  padding: 80px 0 36px 0;
  position: relative;
  z-index: 2;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 18px 0 22px 0;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--text-main);
  letter-spacing: 0.03em;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
}

.footer-col ul li a:hover {
  color: var(--cyan-glow);
  transform: translateX(3px);
  text-decoration: none;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid rgba(37, 99, 235, 0.12);
  font-size: 0.85rem;
  color: var(--text-sub);
  flex-wrap: wrap;
  gap: 16px;
}

/* Back to top floating button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(13, 22, 49, 0.9);
  border: 1px solid var(--border-glow);
  color: var(--cyan-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--btn-gradient);
  color: #FFFFFF;
  transform: translateY(-3px);
}

/* ==========================================================================
   Responsive Breakpoints & Mobile Adaptation
   ========================================================================== */
@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 36px;
  }
  .brand-definition-box {
    text-align: left;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-highlights {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .network-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .tech-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin-left: auto;
    margin-right: auto;
  }
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: translateY(-6px);
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
  .devices-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  html, body {
    overflow-x: hidden;
  }

  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .navbar {
    height: 66px;
  }

  .nav-links {
    position: fixed;
    top: 66px;
    left: 0;
    right: 0;
    background: rgba(7, 11, 24, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    flex-direction: column;
    padding: 24px 20px;
    gap: 16px;
    display: none;
    max-height: calc(100vh - 66px);
    overflow-y: auto;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.85);
  }

  .nav-links.open {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
  }

  .mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 4px auto;
    background-color: var(--text-main);
    transition: all 0.25s ease;
  }

  .mobile-toggle.open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .mobile-toggle.open span:nth-child(2) {
    opacity: 0;
  }
  .mobile-toggle.open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .nav-actions .btn-sm {
    display: none;
  }

  .section-wrapper {
    padding: 70px 0;
  }

  .section-title {
    font-size: clamp(1.75rem, 5vw, 2.2rem);
  }

  .hero-section {
    padding: 104px 0 50px 0;
  }

  .hero-title {
    font-size: clamp(1.85rem, 5.5vw, 2.4rem);
    line-height: 1.25;
  }

  .hero-globe-wrap {
    min-height: 320px;
  }

  .globe-canvas-box {
    max-width: 320px;
  }

  /* Safe floating badges for mobile to prevent horizontal overflow */
  .floating-badge {
    padding: 6px 12px;
    font-size: 0.78rem;
    gap: 6px;
  }

  .badge-top-right {
    top: 4%;
    right: 4px;
  }

  .badge-bottom-left {
    bottom: 4%;
    left: 4px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .devices-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .pricing-notice-box {
    flex-direction: column;
    text-align: center;
    padding: 18px 20px;
    gap: 16px;
  }

  .comparison-table-wrap {
    padding: 16px;
    -webkit-overflow-scrolling: touch;
  }

  .comparison-table {
    min-width: 580px;
  }

  .comparison-table th, .comparison-table td {
    padding: 12px 14px;
    font-size: 0.86rem;
  }
}

@media (max-width: 540px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section-wrapper {
    padding: 56px 0;
  }

  .hero-pill {
    padding: 5px 12px;
    font-size: 0.8rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
    padding: 13px 20px;
  }

  .hero-highlights {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding-top: 18px;
  }

  .highlight-num {
    font-size: 1.25rem;
  }

  .highlight-label {
    font-size: 0.74rem;
  }

  .pricing-card {
    padding: 30px 20px;
  }

  .price-num {
    font-size: 2.5rem;
  }

  .node-region-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
  }

  .region-meta {
    align-self: flex-end;
  }

  .faq-question {
    padding: 16px 16px;
    font-size: 0.98rem;
  }

  .faq-answer {
    padding: 0 16px;
    font-size: 0.88rem;
  }

  .faq-item.active .faq-answer {
    padding: 0 16px 18px 16px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 10px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }

  /* Opening Animation Splash Mobile Tuning */
  .splash-halo {
    width: 110px;
    height: 110px;
  }

  .splash-logo-wrap {
    width: 86px;
    height: 86px;
    margin-bottom: 18px;
  }

  .splash-brand-title {
    font-size: 1.5rem;
  }

  .splash-brand-sub {
    font-size: 0.8rem;
  }

  .splash-globe-bg {
    width: 320px;
    height: 320px;
    max-width: 90vw;
    max-height: 90vw;
  }

  .splash-skip-btn {
    bottom: 24px;
    padding: 8px 18px;
    font-size: 0.8rem;
  }
}

@media (max-width: 380px) {
  .hero-highlights {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 12px;
  }

  .devices-grid {
    grid-template-columns: 1fr;
  }
}