/* ==========================================================================
   TNTCloud Design System - 01｜流光飞入 Light Trail Fly-in
   ========================================================================== */

:root {
  --color-space-blue: #07152B;
  --color-space-blue-dark: #040E1E;
  --color-tech-blue: #247BFF;
  --color-electric-purple: #854DFF;
  --color-aurora-cyan: #54DDFF;
  --color-light-bg: #F3F8FF;
  --color-white: #FFFFFF;
  --color-dark-text: #18304D;
  --color-muted-text: #5D728A;
  --color-border-light: #E2ECF8;
  --color-card-border: rgba(36, 123, 255, 0.12);
  --color-card-bg: #FFFFFF;
  --color-glass-dark: rgba(7, 21, 43, 0.75);
  --color-glass-border: rgba(255, 255, 255, 0.08);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  --shadow-sm: 0 2px 8px rgba(7, 21, 43, 0.04);
  --shadow-md: 0 8px 24px rgba(7, 21, 43, 0.08);
  --shadow-lg: 0 16px 40px rgba(7, 21, 43, 0.12);
  --shadow-glow: 0 0 30px rgba(84, 221, 255, 0.35);
  --shadow-purple-glow: 0 0 35px rgba(133, 77, 255, 0.3);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-dark-text);
  background-color: var(--color-light-bg);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

a:hover {
  color: var(--color-electric-purple);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-glass-dark);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-glass-border);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

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

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

.brand-logo-img {
  height: 38px;
  width: auto;
}

.nav-menu {
  display: none;
  align-items: center;
  gap: 24px;
  list-style: none;
}

@media (min-width: 992px) {
  .nav-menu {
    display: flex;
  }
}

.nav-menu a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 4px;
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-aurora-cyan);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-aurora-cyan), var(--color-electric-purple));
  transition: width var(--transition-normal);
}

.nav-menu a:hover::after {
  width: 100%;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--color-tech-blue) 0%, var(--color-electric-purple) 100%);
  box-shadow: 0 4px 18px rgba(36, 123, 255, 0.35);
  border: 1px solid rgba(84, 221, 255, 0.3);
}

.btn-primary:hover {
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(133, 77, 255, 0.45), var(--shadow-glow);
}

.btn-secondary {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  color: var(--color-aurora-cyan);
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--color-aurora-cyan);
}

.btn-outline {
  color: var(--color-tech-blue);
  background: transparent;
  border: 1.5px solid var(--color-tech-blue);
}

.btn-outline:hover {
  color: #FFFFFF;
  background: var(--color-tech-blue);
}

.mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-glass-border);
}

@media (min-width: 992px) {
  .mobile-toggle {
    display: none;
  }
}

.mobile-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: #FFFFFF;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.mobile-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-space-blue);
  padding: 24px 20px;
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  z-index: 999;
  overflow-y: auto;
  border-bottom: 1px solid var(--color-glass-border);
}

.mobile-drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.mobile-nav-list a {
  display: block;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.15rem;
  font-weight: 600;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   Hero Section - 01｜Light Trail Fly-in
   ========================================================================== */
.hero-section {
  position: relative;
  background: radial-gradient(circle at 50% 20%, #11284E 0%, var(--color-space-blue) 60%, var(--color-space-blue-dark) 100%);
  color: #FFFFFF;
  padding-top: 130px;
  padding-bottom: 90px;
  overflow: hidden;
}

/* Background Cyber Grid & Aurora Glow */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(84, 221, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(84, 221, 255, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at 50% 40%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, black 20%, transparent 80%);
  pointer-events: none;
}

.hero-glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
}

.hero-glow-1 {
  width: 420px;
  height: 420px;
  top: 15%;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(36, 123, 255, 0.28) 0%, rgba(133, 77, 255, 0.15) 50%, transparent 70%);
}

.hero-glow-2 {
  width: 300px;
  height: 300px;
  top: 40%;
  left: 20%;
  background: radial-gradient(circle, rgba(84, 221, 255, 0.18) 0%, transparent 70%);
}

/* LOGO Animation Container: Light Trail Fly-in */
.logo-flyin-stage {
  position: relative;
  width: 100%;
  max-width: 380px;
  margin: 0 auto 36px;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Dynamic Light Trail Behind Logo */
.light-trail-beam {
  position: absolute;
  top: 50%;
  left: -200px;
  width: 320px;
  height: 4px;
  background: linear-gradient(90deg, transparent, rgba(133, 77, 255, 0.6) 40%, rgba(84, 221, 255, 0.95) 90%, #FFFFFF 100%);
  border-radius: 4px;
  filter: blur(1.5px) drop-shadow(0 0 12px #54DDFF);
  transform: translateY(-50%);
  opacity: 0;
  animation: trailFlyIn 1.1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  pointer-events: none;
}

/* Soft Flash Burst on Arrival */
.arrival-flash-burst {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.8) 0%, rgba(84, 221, 255, 0.5) 30%, rgba(133, 77, 255, 0) 70%);
  opacity: 0;
  transform: scale(0.3);
  animation: flashBurst 0.6s ease-out 0.95s forwards;
  pointer-events: none;
}

/* Logo Motion Wrap: 
   1. Fly in from left (-120vw)
   2. Flash
   3. Gentle float (amplitude 5px, 4s cycle)
*/
.logo-animated-wrapper {
  position: relative;
  z-index: 5;
  display: inline-block;
  opacity: 0;
  transform: translateX(-120vw);
  animation: 
    logoFlyIn 1.05s cubic-bezier(0.16, 1, 0.3, 1) forwards,
    logoFloatIdle 4.2s ease-in-out 1.55s infinite alternate;
}

.logo-animated-wrapper svg {
  width: 100%;
  max-width: 340px;
  height: auto;
  filter: drop-shadow(0 10px 25px rgba(36, 123, 255, 0.45));
}

/* Keyframe Animations for Light Trail Fly-in */
@keyframes logoFlyIn {
  0% {
    opacity: 0;
    transform: translateX(-120vw) scale(0.85) skewX(-15deg);
  }
  60% {
    opacity: 1;
    transform: translateX(12px) scale(1.04) skewX(2deg);
  }
  85% {
    transform: translateX(-4px) scale(0.99) skewX(0);
  }
  100% {
    opacity: 1;
    transform: translateX(0) scale(1) skewX(0);
  }
}

@keyframes trailFlyIn {
  0% {
    opacity: 0;
    width: 0px;
    transform: translateY(-50%) translateX(-80vw);
  }
  40% {
    opacity: 1;
    width: 280px;
  }
  80% {
    opacity: 0.8;
    width: 140px;
    transform: translateY(-50%) translateX(-20px);
  }
  100% {
    opacity: 0;
    width: 0px;
    transform: translateY(-50%) translateX(10px);
  }
}

@keyframes flashBurst {
  0% {
    opacity: 0;
    transform: scale(0.2);
  }
  40% {
    opacity: 0.85;
    transform: scale(1.1);
  }
  100% {
    opacity: 0;
    transform: scale(1.5);
  }
}

@keyframes logoFloatIdle {
  0% {
    transform: translateY(-5px);
  }
  100% {
    transform: translateY(5px);
  }
}

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
  .logo-animated-wrapper {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
  .light-trail-beam,
  .arrival-flash-burst {
    display: none !important;
  }
}

/* Hero Content Fade-in Sequences */
.hero-content {
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-tagline-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(36, 123, 255, 0.15);
  border: 1px solid rgba(84, 221, 255, 0.35);
  color: var(--color-aurora-cyan);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  opacity: 0;
  animation: heroFadeUp 0.8s ease-out 1.1s forwards;
}

.hero-tagline-badge .badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-aurora-cyan);
  box-shadow: 0 0 10px var(--color-aurora-cyan);
}

.hero-title {
  font-size: 2.2rem;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
  color: #FFFFFF;
  opacity: 0;
  animation: heroFadeUp 0.8s ease-out 1.25s forwards;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3.1rem;
  }
}

.hero-title .text-gradient {
  background: linear-gradient(135deg, var(--color-aurora-cyan) 0%, #FFFFFF 50%, var(--color-electric-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #B5CAE3;
  margin-bottom: 34px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0;
  animation: heroFadeUp 0.8s ease-out 1.4s forwards;
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.2rem;
  }
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  opacity: 0;
  animation: heroFadeUp 0.8s ease-out 1.55s forwards;
}

.hero-cta-group .btn {
  padding: 13px 32px;
  font-size: 1.05rem;
}

.hero-trust-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: #8CA6C6;
  font-size: 0.88rem;
  opacity: 0;
  animation: heroFadeUp 0.8s ease-out 1.7s forwards;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

@keyframes heroFadeUp {
  0% {
    opacity: 0;
    transform: translateY(22px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   Section Common Styles
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.section-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: rgba(36, 123, 255, 0.08);
  color: var(--color-tech-blue);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 1.95rem;
  font-weight: 800;
  color: var(--color-dark-text);
  line-height: 1.3;
  margin-bottom: 14px;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.35rem;
  }
}

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

/* ==========================================================================
   03｜Core Advantages: Staggered Alternating Layout (Not boring 3-col)
   ========================================================================== */
.features-section {
  background: #FFFFFF;
}

.staggered-features {
  display: flex;
  flex-direction: column;
  gap: 50px;
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
  padding: 36px;
  border-radius: var(--radius-xl);
  background: var(--color-light-bg);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-row:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(36, 123, 255, 0.25);
}

@media (min-width: 992px) {
  .feature-row {
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    padding: 48px;
  }
  .feature-row.reverse {
    direction: rtl;
  }
  .feature-row.reverse > * {
    direction: ltr;
  }
}

.feature-content h3 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--color-dark-text);
  margin-bottom: 16px;
  line-height: 1.35;
}

.feature-content p {
  color: var(--color-muted-text);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 22px;
}

.feature-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.feature-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-dark-text);
  font-weight: 500;
}

.feature-bullets li svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-tech-blue);
}

.feature-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, rgba(36, 123, 255, 0.05) 0%, rgba(133, 77, 255, 0.08) 100%);
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid rgba(36, 123, 255, 0.1);
  min-height: 240px;
}

.feature-visual svg {
  width: 100%;
  max-width: 380px;
  height: auto;
}

/* ==========================================================================
   04｜Global Network Map Section
   ========================================================================== */
.network-section {
  background: var(--color-space-blue);
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.network-section .section-title {
  color: #FFFFFF;
}

.network-section .section-subtitle {
  color: #9DB4D2;
}

.network-map-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  background: rgba(4, 14, 30, 0.7);
  border: 1px solid var(--color-glass-border);
  padding: 30px 20px;
  margin-bottom: 40px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.network-svg-map {
  width: 100%;
  height: auto;
  max-height: 480px;
}

.network-disclaimer-note {
  font-size: 0.85rem;
  color: #7995B8;
  text-align: center;
  margin-top: 14px;
  line-height: 1.5;
}

.network-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .network-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .network-cards-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.network-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.network-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-aurora-cyan);
  background: rgba(255, 255, 255, 0.07);
}

.network-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.network-card-flag {
  font-size: 1.5rem;
}

.network-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #FFFFFF;
}

.network-card-desc {
  font-size: 0.9rem;
  color: #A0B8D6;
  line-height: 1.6;
}

/* ==========================================================================
   05｜Service Use Cases
   ========================================================================== */
.scenarios-section {
  background: #FFFFFF;
}

.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .scenarios-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.scenario-card {
  background: var(--color-light-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.scenario-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(36, 123, 255, 0.25);
}

.scenario-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(36, 123, 255, 0.1) 0%, rgba(133, 77, 255, 0.15) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-tech-blue);
  margin-bottom: 20px;
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark-text);
  margin-bottom: 12px;
}

.scenario-desc {
  font-size: 0.95rem;
  color: var(--color-muted-text);
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

.scenario-tip {
  font-size: 0.85rem;
  color: #6C829D;
  background: #FFFFFF;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-tech-blue);
}

/* ==========================================================================
   06｜Pricing Section: 3 Cards + Comparison Table
   ========================================================================== */
.pricing-section {
  background: var(--color-light-bg);
  position: relative;
}

.pricing-notice-box {
  max-width: 860px;
  margin: 0 auto 40px;
  padding: 16px 22px;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-tech-blue);
  font-size: 0.92rem;
  color: var(--color-dark-text);
  line-height: 1.6;
  box-shadow: var(--shadow-sm);
}

.pricing-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-bottom: 50px;
}

@media (min-width: 992px) {
  .pricing-cards-grid {
    grid-template-columns: repeat(3, 1fr);
    align-items: stretch;
  }
}

.price-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.price-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.price-card.popular {
  border: 2px solid var(--color-tech-blue);
  box-shadow: 0 10px 30px rgba(36, 123, 255, 0.15);
}

.popular-badge-pill {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-tech-blue) 0%, var(--color-electric-purple) 100%);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(36, 123, 255, 0.35);
  letter-spacing: 0.5px;
}

.price-card-header {
  margin-bottom: 20px;
}

.price-card-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--color-dark-text);
  margin-bottom: 6px;
}

.price-card-tag {
  font-size: 0.88rem;
  color: var(--color-muted-text);
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark-text);
}

.price-amount {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--color-dark-text);
}

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

.price-range-note {
  font-size: 0.84rem;
  color: var(--color-tech-blue);
  font-weight: 600;
  margin-bottom: 20px;
}

.price-traffic-banner {
  background: var(--color-light-bg);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

.traffic-main {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-dark-text);
}

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

.price-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.price-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--color-dark-text);
}

.price-features-list li svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: #10B981;
}

.price-recommendation {
  font-size: 0.85rem;
  color: #6C829D;
  background: var(--color-light-bg);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  line-height: 1.5;
}

/* Comparison Table */
.comparison-table-wrapper {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
  min-width: 640px;
}

.comparison-table th,
.comparison-table td {
  padding: 18px 22px;
  border-bottom: 1px solid var(--color-border-light);
}

.comparison-table th {
  background: var(--color-light-bg);
  font-weight: 700;
  color: var(--color-dark-text);
}

.comparison-table td:first-child {
  font-weight: 600;
  color: var(--color-dark-text);
  width: 25%;
}

.comparison-table tr:hover td {
  background: rgba(243, 248, 255, 0.6);
}

/* ==========================================================================
   07｜Knowledge Articles Showcase
   ========================================================================== */
.articles-section {
  background: #FFFFFF;
}

.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 768px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-card {
  background: var(--color-light-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(36, 123, 255, 0.3);
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.article-category {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-tech-blue);
  background: rgba(36, 123, 255, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

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

.article-card-title {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--color-dark-text);
  margin-bottom: 12px;
}

.article-card-title a {
  color: var(--color-dark-text);
}

.article-card-title a:hover {
  color: var(--color-tech-blue);
}

.article-card-summary {
  font-size: 0.92rem;
  color: var(--color-muted-text);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--color-border-light);
  font-size: 0.85rem;
  color: var(--color-muted-text);
}

.article-card-link {
  font-weight: 600;
  color: var(--color-tech-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-card-link:hover {
  color: var(--color-electric-purple);
  gap: 8px;
}

/* ==========================================================================
   08｜User Testimonials & Feedback
   ========================================================================== */
.testimonials-section {
  background: var(--color-light-bg);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 36px;
}

@media (min-width: 992px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

.testimonial-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.testimonial-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-electric-purple);
  background: rgba(133, 77, 255, 0.08);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.testimonial-verified {
  font-size: 0.8rem;
  color: #10B981;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
}

.testimonial-scenario {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-dark-text);
  margin-bottom: 12px;
}

.testimonial-body {
  font-size: 0.94rem;
  color: var(--color-muted-text);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

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

.author-avatar-initial {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-tech-blue) 0%, var(--color-electric-purple) 100%);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-role {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-dark-text);
}

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

.feedback-cta-box {
  background: #FFFFFF;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px 30px;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.feedback-cta-box p {
  color: var(--color-muted-text);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

/* ==========================================================================
   09｜FAQ Accordion
   ========================================================================== */
.faq-section {
  background: #FFFFFF;
}

.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--color-light-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--color-tech-blue);
  background: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-dark-text);
  background: transparent;
}

.faq-icon-arrow {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-tech-blue);
  transition: transform var(--transition-normal);
}

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

.faq-answer-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease-out;
  padding: 0 22px;
}

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

.faq-answer-text {
  font-size: 0.96rem;
  color: var(--color-muted-text);
  line-height: 1.7;
}

/* ==========================================================================
   10｜Footer
   ========================================================================== */
.site-footer {
  background: var(--color-space-blue);
  color: #8DA7C7;
  padding-top: 70px;
  padding-bottom: 40px;
  border-top: 1px solid var(--color-glass-border);
}

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

@media (min-width: 640px) {
  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .footer-top-grid {
    grid-template-columns: 2fr 1fr 1.5fr 1fr;
  }
}

.footer-brand-col p {
  font-size: 0.92rem;
  line-height: 1.65;
  margin-top: 14px;
  max-width: 320px;
  color: #9DB4D2;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: #9DB4D2;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: var(--color-aurora-cyan);
}

.footer-bottom-bar {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

@media (min-width: 768px) {
  .footer-bottom-bar {
    flex-direction: row;
  }
}

.footer-legal-links {
  display: flex;
  gap: 20px;
}

.footer-legal-links a {
  color: #7A95B8;
}

.footer-legal-links a:hover {
  color: #FFFFFF;
}

/* ==========================================================================
   Article Single Page Styles
   ========================================================================== */
.article-header-hero {
  background: var(--color-space-blue);
  color: #FFFFFF;
  padding-top: 120px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--color-glass-border);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: #8DA7C7;
  margin-bottom: 20px;
}

.breadcrumbs a {
  color: #8DA7C7;
}

.breadcrumbs a:hover {
  color: var(--color-aurora-cyan);
}

.article-hero-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.35;
  color: #FFFFFF;
  margin-bottom: 18px;
}

@media (min-width: 768px) {
  .article-hero-title {
    font-size: 2.6rem;
  }
}

.article-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  color: #9DB4D2;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: 60px 0;
}

@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: 3fr 1fr;
    align-items: start;
  }
}

.article-main-content {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
  .article-main-content {
    padding: 50px 45px;
  }
}

.article-lead-box {
  background: var(--color-light-bg);
  border-left: 4px solid var(--color-tech-blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-dark-text);
  margin-bottom: 36px;
}

.article-body-prose h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-dark-text);
  margin-top: 40px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-light);
}

.article-body-prose h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark-text);
  margin-top: 24px;
  margin-bottom: 12px;
}

.article-body-prose p {
  font-size: 1.02rem;
  line-height: 1.85;
  color: #2D415A;
  margin-bottom: 20px;
}

.article-data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.92rem;
}

.article-data-table th,
.article-data-table td {
  padding: 14px 16px;
  border: 1px solid var(--color-border-light);
  text-align: left;
}

.article-data-table th {
  background: var(--color-light-bg);
  font-weight: 700;
  color: var(--color-dark-text);
}

.article-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.toc-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark-text);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-list a {
  font-size: 0.9rem;
  color: var(--color-muted-text);
  display: block;
}

.toc-list a:hover {
  color: var(--color-tech-blue);
}

.sidebar-cta-card {
  background: linear-gradient(135deg, var(--color-space-blue) 0%, #102B54 100%);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 26px;
  text-align: center;
}

.sidebar-cta-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.sidebar-cta-card p {
  font-size: 0.88rem;
  color: #B5CAE3;
  line-height: 1.5;
  margin-bottom: 18px;
}