:root {
  --bg-color: #fbfbf9;
  --text-main: #1a1a1a;
  --text-muted: #595959;
  --primary: #f04423;
  --primary-hover: #d3381a;
  --card-bg: #ffffff;
  --border-color: #eaeaea;
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 12px 24px rgba(0, 0, 0, 0.08);
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 16px;
  --container: 1200px;
}

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

body {
  font-family: var(--font-base);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
}

/* Animations */
@keyframes spin { 
  from { transform: rotate(0deg); } 
  to { transform: rotate(360deg); } 
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  padding: 1rem 0;
}

.nav-wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.logo-brand svg {
  width: 32px;
  height: 32px;
  fill: var(--primary);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-item {
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.3s;
  position: relative;
  padding: 8px 0;
}

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

.nav-item.active {
  color: var(--primary);
  font-weight: 700;
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--primary);
  border-radius: 3px;
}

/* Buttons */
.btn-primary {
  background-color: var(--primary);
  color: #fff;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(240, 68, 35, 0.3);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(240, 68, 35, 0.4);
}

.btn-secondary {
  background-color: #fff;
  color: var(--text-main);
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-secondary:hover {
  border-color: var(--text-main);
  background-color: #fafafa;
}

/* Main Container */
.page-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* Sections */
.section {
  padding: 80px 0;
}

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

.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
  color: var(--text-main);
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Hero Section */
.hero {
  padding: 100px 0 60px;
  display: flex;
  align-items: center;
  gap: 60px;
  animation: fadeIn 1s ease-out;
}

.hero-content {
  flex: 1;
}

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background-color: rgba(240, 68, 35, 0.1);
  color: var(--primary);
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.5rem;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 90%;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  flex: 1;
  position: relative;
}

.hero-image svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 30px rgba(0,0,0,0.1));
  animation: float 6s ease-in-out infinite;
}

/* Bento Grid */
.bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 24px;
  margin-bottom: 60px;
}

.bento-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
  display: flex;
  flex-direction: column;
}

.bento-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.bento-card.large {
  grid-column: span 2;
}

.bento-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(240, 68, 35, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.bento-icon svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.bento-title {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.bento-desc {
  color: var(--text-muted);
  flex-grow: 1;
}

/* Review Carousel / Grid */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  border: 1px solid var(--border-color);
}

.stars {
  color: #fbbf24;
  margin-bottom: 16px;
}

.stars svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.review-text {
  font-style: italic;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.reviewer-name {
  font-weight: 600;
  font-size: 0.9rem;
}

/* FAQ Accordion */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 16px;
  background: var(--card-bg);
  overflow: hidden;
}

.faq-q {
  padding: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.125rem;
  user-select: none;
}

.faq-icon {
  transition: transform 0.3s;
}

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

.faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-muted);
}

.faq-item.active .faq-a {
  padding: 0 24px 24px;
  max-height: 300px;
}

/* Windows Download Showcase */
.win-dl-showcase {
  background: linear-gradient(135deg, #ffffff 0%, #fff5f3 100%);
  border: 2px solid var(--primary);
  border-radius: 24px;
  padding: 48px;
  display: flex;
  align-items: center;
  gap: 40px;
  margin-top: 20px;
  margin-bottom: 60px;
  box-shadow: 0 20px 40px rgba(240, 68, 35, 0.12);
  position: relative;
  overflow: hidden;
}

.win-dl-showcase::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(240, 68, 35, 0.08) 0%, rgba(240, 68, 35, 0) 70%);
  border-radius: 50%;
  z-index: 0;
}

.win-dl-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.win-dl-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.win-dl-badge {
  background: var(--primary);
  color: #fff;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
}

.win-dl-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}

.win-dl-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
  background: rgba(255, 255, 255, 0.8);
  padding: 20px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.win-spec-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.win-spec-icon {
  width: 40px;
  height: 40px;
  background: rgba(240, 68, 35, 0.1);
  color: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.win-spec-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.win-spec-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.win-spec-text strong {
  color: var(--text-main);
  display: block;
  font-size: 1rem;
}

.win-dl-visual {
  flex: 0 0 320px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.win-dl-visual svg {
  width: 100%;
  max-width: 280px;
  height: auto;
  filter: drop-shadow(0 12px 24px rgba(0,0,0,0.1));
}

@media (max-width: 992px) {
  .win-dl-showcase {
    flex-direction: column;
    padding: 32px 24px;
    text-align: center;
  }
  .win-dl-title {
    justify-content: center;
  }
  .win-dl-specs {
    grid-template-columns: 1fr;
    text-align: left;
  }
}

/* Platforms Layout */
.platform-hero {
  text-align: center;
  padding: 80px 0 40px;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-bottom: 80px;
}

.plat-box {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.plat-box:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.plat-box.featured {
  border: 2px solid var(--primary);
  position: relative;
  box-shadow: 0 8px 30px rgba(240, 68, 35, 0.15);
}

.plat-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.plat-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  background: rgba(0,0,0,0.05);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
}

.plat-box.featured .plat-icon {
  background: rgba(240, 68, 35, 0.1);
  color: var(--primary);
}

.plat-icon svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

.plat-title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.plat-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

/* Steps Guide */
.steps-wrap {
  max-width: 800px;
  margin: 0 auto;
}

.step-item {
  display: flex;
  gap: 24px;
  margin-bottom: 40px;
}

.step-num {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: bold;
  flex-shrink: 0;
}

.step-info h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
  padding-top: 8px;
}

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

/* Article Layout */
.article-page {
  display: flex;
  gap: 60px;
  padding: 60px 0;
}

.article-main {
  flex: 1;
}

.article-sidebar {
  width: 320px;
  flex-shrink: 0;
}

.sticky-box {
  position: sticky;
  top: 100px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.article-header {
  margin-bottom: 40px;
}

.tag-cloud {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.tag {
  background: #eee;
  padding: 4px 12px;
  border-radius: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.article-content h2 {
  font-size: 1.75rem;
  margin: 40px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.article-content p {
  margin-bottom: 20px;
  color: #333;
}

.article-content ul {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 12px;
  color: #333;
}

.cta-box {
  background: linear-gradient(135deg, #f04423 0%, #ff7b5a 100%);
  color: #fff;
  padding: 40px;
  border-radius: var(--radius);
  text-align: center;
  margin-top: 60px;
}

.cta-box h2 {
  color: #fff;
  margin-bottom: 16px;
}

.cta-box p {
  color: rgba(255,255,255,0.9);
  margin-bottom: 32px;
}

.btn-white {
  background: #fff;
  color: var(--primary);
  padding: 12px 32px;
  border-radius: 30px;
  font-weight: 600;
  display: inline-flex;
  transition: transform 0.3s;
}

.btn-white:hover {
  transform: translateY(-2px);
}

/* Footer */
.footer {
  background: #fff;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 40px;
  margin-top: 80px;
  text-align: center;
}

.security-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(46, 204, 113, 0.1);
  color: #27ae60;
  padding: 8px 24px;
  border-radius: 20px;
  font-weight: 600;
  margin-bottom: 24px;
}

.security-badge svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

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

/* Responsive */
@media (max-width: 992px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding: 60px 0;
  }
  .hero-actions {
    justify-content: center;
  }
  .bento {
    grid-template-columns: 1fr;
  }
  .bento-card.large {
    grid-column: span 1;
  }
  .review-grid {
    grid-template-columns: 1fr;
  }
  .article-page {
    flex-direction: column;
  }
  .article-sidebar {
    width: 100%;
  }
  .sticky-box {
    position: static;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero-title {
    font-size: 2.5rem;
  }
}