@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

/* CSS Variables */
:root {
  --primary: #0066ff;
  --primary-glow: rgba(0, 102, 255, 0.15);
  --secondary: #00d2ff;
  --secondary-glow: rgba(0, 210, 255, 0.15);
  --dark-bg: #0b0f19;
  --dark-card: rgba(15, 23, 42, 0.8);
  --light-bg: #f8fafc;
  --light-card: rgba(255, 255, 255, 0.85);
  --border-light: rgba(226, 232, 240, 0.8);
  --border-dark: rgba(255, 255, 255, 0.08);
  --text-dark: #0f172a;
  --text-muted-dark: #475569;
  --text-light: #f8fafc;
  --text-muted-light: #94a3b8;
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient-glow: linear-gradient(135deg, rgba(0, 102, 255, 0.5) 0%, rgba(0, 210, 255, 0.5) 100%);
  --gradient-bg: linear-gradient(180deg, #f8fafc 0%, #edf2f9 100%);
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 30px -10px rgba(0, 102, 255, 0.08);
  --shadow-lg: 0 20px 40px -15px rgba(0, 102, 255, 0.15);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--light-bg);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

img {
  max-width: 100%;
  height: auto;
}

ul {
  list-style: none;
}

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

h1 {
  font-size: 2.75rem;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.25rem;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  text-align: center;
  position: relative;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  color: var(--text-muted-dark);
  font-size: 1.05rem;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
  padding: 0.75rem 0;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo svg {
  fill: url(#logo-grad);
  width: 1.8rem;
  height: 1.8rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

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

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

.nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-light);
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--primary-glow);
  opacity: 0.95;
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-secondary:hover {
  background-color: rgba(0, 102, 255, 0.05);
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--text-dark);
  transition: var(--transition);
}

/* Sections General */
section {
  padding: 6.5rem 0;
  position: relative;
}

.section-bg-alt {
  background-color: #f4f7ff;
}

.section-header {
  max-width: 650px;
  margin: 0 auto 4rem auto;
  text-align: center;
}

.section-header p {
  font-size: 1.1rem;
  margin-top: 0.75rem;
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  background-color: rgba(0, 102, 255, 0.08);
  border-radius: 50px;
  margin-bottom: 1rem;
}

/* Hero Section */
.hero {
  padding: 10rem 0 7rem 0;
  background-color: var(--dark-bg);
  color: var(--text-light);
  position: relative;
  overflow: hidden;
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.7;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 10;
}

.hero-content h1 {
  color: var(--text-light);
  font-size: 3.5rem;
  line-height: 1.15;
}

.hero-content h1 span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  color: var(--text-muted-light);
  font-size: 1.15rem;
  margin-bottom: 2rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.hero-tags span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: #a5b4fc;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.35rem 0.75rem;
  border-radius: 50px;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-globe {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(0, 210, 255, 0.3) 0%, rgba(0, 102, 255, 0.1) 40%, rgba(11, 15, 25, 0) 70%);
  border: 1.5px dashed rgba(0, 102, 255, 0.3);
  position: relative;
  animation: rotateGlobe 30s linear infinite;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-globe::before {
  content: '';
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  border-radius: 50%;
  border: 1px solid rgba(0, 210, 255, 0.15);
  animation: pulseGlobe 4s ease-in-out infinite alternate;
}

.hero-globe-core {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: var(--gradient-primary);
  box-shadow: 0 0 50px rgba(0, 102, 255, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-globe-core svg {
  width: 5.5rem;
  height: 5.5rem;
  fill: #fff;
  filter: drop-shadow(0 2px 10px rgba(0, 0, 0, 0.2));
}

.hero-floating-card {
  position: absolute;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  animation: floatCard 4s ease-in-out infinite;
}

.hero-floating-card.c1 {
  top: 10%;
  left: 5%;
  animation-delay: 0s;
}

.hero-floating-card.c2 {
  bottom: 12%;
  right: 5%;
  animation-delay: 1.5s;
}

.hero-floating-card.c3 {
  top: 60%;
  left: -5%;
  animation-delay: 3s;
}

.hero-floating-card svg {
  width: 1.5rem;
  height: 1.5rem;
}

.hero-floating-card .text {
  display: flex;
  flex-direction: column;
}

.hero-floating-card .label {
  font-size: 0.7rem;
  color: var(--text-muted-light);
}

.hero-floating-card .value {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}

@keyframes rotateGlobe {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes pulseGlobe {
  0% { transform: scale(0.95); opacity: 0.5; }
  100% { transform: scale(1.05); opacity: 1; }
}

@keyframes floatCard {
  0% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0); }
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

.feature-card {
  background-color: var(--light-card);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 102, 255, 0.2);
}

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

.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 12px;
  background-color: rgba(0, 102, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--primary);
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background-color: var(--primary);
  color: #fff;
  transform: scale(1.05);
}

.feature-icon svg {
  width: 1.75rem;
  height: 1.75rem;
  fill: currentColor;
}

/* Pricing Section */
.pricing-toggle-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.pricing-toggle-label {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-muted-dark);
}

.pricing-toggle-label.active {
  color: var(--primary);
}

.pricing-switch-container {
  position: relative;
  width: 60px;
  height: 32px;
  background-color: rgba(0, 102, 255, 0.1);
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition);
}

.pricing-switch-ball {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gradient-primary);
  transition: var(--transition);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.pricing-switch-container.yearly .pricing-switch-ball {
  left: calc(100% - 28px);
}

.pricing-discount-badge {
  background-color: #ff3b30;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--light-card);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  padding: 3rem 2.25rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card.popular {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-md);
  transform: scale(1.03);
}

.pricing-card.popular::before {
  content: '主力推荐';
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.85rem;
  border-radius: 50px;
}

.pricing-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 102, 255, 0.25);
}

.pricing-card.popular:hover {
  border-color: var(--primary);
  box-shadow: 0 20px 40px -10px rgba(0, 102, 255, 0.2);
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-muted-dark);
  margin-bottom: 0.5rem;
}

.pricing-price-wrap {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

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

.pricing-amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1;
}

.pricing-period {
  font-size: 0.95rem;
  color: var(--text-muted-dark);
}

.pricing-desc {
  font-size: 0.95rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 1.5rem;
}

.pricing-features {
  margin-bottom: 2.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-muted-dark);
}

.pricing-features li.disabled {
  color: var(--text-muted-light);
  text-decoration: line-through;
}

.pricing-features li svg {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
}

.pricing-features li.disabled svg {
  fill: var(--text-muted-light);
}

.pricing-features li:not(.disabled) svg {
  fill: var(--primary);
}

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

/* Tutorials Section */
.tutorials-container {
  background-color: var(--light-card);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  padding: 3rem;
  box-shadow: var(--shadow-md);
}

.tutorials-tabs {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.tutorial-tab-btn {
  background-color: rgba(0, 102, 255, 0.05);
  border: 1px solid var(--border-light);
  color: var(--text-muted-dark);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.65rem 1.5rem;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tutorial-tab-btn svg {
  width: 1.2rem;
  height: 1.2rem;
  fill: currentColor;
}

.tutorial-tab-btn:hover {
  background-color: rgba(0, 102, 255, 0.1);
  color: var(--primary);
}

.tutorial-tab-btn.active {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.tutorial-content {
  display: none;
}

.tutorial-content.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

.tutorial-steps-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.tutorial-step-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tutorial-step-item {
  display: flex;
  gap: 1.25rem;
}

.tutorial-step-num {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px var(--primary-glow);
}

.tutorial-step-detail h4 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.tutorial-step-detail p {
  font-size: 0.95rem;
}

.tutorial-step-detail code {
  background-color: rgba(0, 102, 255, 0.06);
  color: var(--primary);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.85rem;
}

.tutorial-mockup {
  background-color: #0f172a;
  border-radius: 16px;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.mockup-dot.r { background-color: #ff5f56; }
.mockup-dot.y { background-color: #ffbd2e; }
.mockup-dot.g { background-color: #27c93f; }

.mockup-title {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: #94a3b8;
  font-family: monospace;
}

.mockup-content {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  color: #cbd5e1;
}

.mockup-line {
  margin-bottom: 0.5rem;
  display: flex;
}

.mockup-line.success {
  color: #34d399;
}

.mockup-line.info {
  color: #60a5fa;
}

.mockup-line.warning {
  color: #fbbf24;
}

.mockup-line span.label {
  color: #94a3b8;
  width: 80px;
  display: inline-block;
}

/* Articles Section */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.article-card {
  background-color: var(--light-card);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 102, 255, 0.2);
}

.article-thumb {
  height: 180px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  position: relative;
}

.article-thumb::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, transparent 20%, rgba(11, 15, 25, 0.2) 100%);
}

.article-thumb svg {
  width: 4rem;
  height: 4rem;
  fill: currentColor;
  opacity: 0.9;
  z-index: 1;
}

.article-content {
  padding: 1.75rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-muted-light);
  margin-bottom: 0.75rem;
  display: flex;
  gap: 1rem;
}

.article-content h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.article-content h3 a:hover {
  color: var(--primary);
}

.article-content p {
  font-size: 0.9rem;
  color: var(--text-muted-dark);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
}

.article-more svg {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
  transition: var(--transition);
}

.article-card:hover .article-more svg {
  transform: translateX(3px);
}

/* Article Detail Layout */
.article-page {
  padding-top: 7rem;
}

.article-detail-wrap {
  max-width: 850px;
  margin: 0 auto;
  background-color: #fff;
  padding: 3.5rem;
  border-radius: 24px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.article-detail-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 2rem;
}

.article-detail-header h1 {
  font-size: 2.25rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.article-detail-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-muted-dark);
}

.article-body {
  font-size: 1.1rem;
  color: #334155;
  line-height: 1.8;
}

.article-body h2 {
  font-size: 1.6rem;
  text-align: left;
  margin: 2.5rem 0 1.25rem 0;
  color: var(--text-dark);
  border-left: 4px solid var(--primary);
  padding-left: 0.75rem;
}

.article-body h3 {
  font-size: 1.25rem;
  margin: 1.75rem 0 1rem 0;
  color: var(--text-dark);
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body strong {
  color: var(--text-dark);
}

.article-body ul, .article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body a {
  color: var(--primary);
  border-bottom: 1px dashed var(--primary);
  font-weight: 500;
}

.article-body a:hover {
  background-color: rgba(0, 102, 255, 0.05);
}

.article-body blockquote {
  border-left: 4px solid #cbd5e1;
  padding-left: 1rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--text-muted-dark);
}

.article-footer-nav {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  gap: 2rem;
}

.article-footer-btn {
  display: flex;
  flex-direction: column;
  max-width: 48%;
}

.article-footer-btn span {
  font-size: 0.8rem;
  color: var(--text-muted-light);
  margin-bottom: 0.25rem;
}

.article-footer-btn a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-dark);
}

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

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

.review-card {
  background-color: var(--light-card);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.review-stars {
  color: #fbbf24;
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.review-stars svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: currentColor;
}

.review-content {
  font-size: 0.95rem;
  color: var(--text-muted-dark);
  margin-bottom: 1.5rem;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.review-avatar {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.review-user-info h4 {
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

.review-user-info span {
  font-size: 0.8rem;
  color: var(--text-muted-light);
}

/* FAQ Section */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--light-card);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: rgba(0, 102, 255, 0.25);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  padding: 1.25rem 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.faq-question h4 {
  font-size: 1.05rem;
  font-weight: 600;
}

.faq-icon {
  width: 1.25rem;
  height: 1.25rem;
  fill: var(--text-muted-dark);
  transition: var(--transition);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  background-color: rgba(0, 102, 255, 0.01);
}

.faq-answer-inner {
  padding: 0 1.75rem 1.5rem 1.75rem;
  font-size: 0.95rem;
  color: var(--text-muted-dark);
}

.faq-answer-inner p {
  margin-bottom: 0.75rem;
}

.faq-answer-inner p:last-child {
  margin-bottom: 0;
}

/* Footer */
.footer {
  background-color: var(--dark-bg);
  color: var(--text-light);
  padding: 5rem 0 2.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-col h4 {
  color: var(--text-light);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.footer-col p {
  color: var(--text-muted-light);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col ul a {
  color: var(--text-muted-light);
  font-size: 0.9rem;
}

.footer-col ul a:hover {
  color: var(--secondary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-muted-light);
}

.footer-geo-tags {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.2);
}

/* Animations & Utilities */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive design */
@media (max-width: 1024px) {
  h1 { font-size: 2.25rem; }
  .hero-content h1 { font-size: 2.75rem; }
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-visual { order: -1; margin-bottom: 2rem; }
  .hero-tags { justify-content: center; }
  .nav-links { display: none; } /* Mobile nav implementation */
  .menu-toggle { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .pricing-card.popular { transform: none; }
}

@media (max-width: 768px) {
  section { padding: 4.5rem 0; }
  .navbar .container { height: 4rem; }
  .tutorials-container { padding: 1.5rem; }
  .tutorial-steps-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .article-detail-wrap { padding: 1.75rem; }
  .article-footer-nav { flex-direction: column; gap: 1rem; }
  .article-footer-btn { max-width: 100%; }
}

/* Mobile Active Navigation Drawer styles managed in JS */
.nav-active .nav-links {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 4.5rem;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  padding: 2rem;
  gap: 1.5rem;
  box-shadow: var(--shadow-md);
}

.nav-active .menu-toggle span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-active .menu-toggle span:nth-child(2) {
  opacity: 0;
}

.nav-active .menu-toggle span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -7px);
}