/* ===================================================
   Quick VPN 官网模板 - 全局样式
   符合 Google SEO / EEAT 标准
   =================================================== */

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

:root {
  --color-bg-primary: #050d1a;
  --color-bg-secondary: #0a1628;
  --color-bg-card: #0e1e36;
  --color-accent: #1a8cff;
  --color-accent-hover: #0070e0;
  --color-accent-light: #4db8ff;
  --color-text-primary: #ffffff;
  --color-text-secondary: #a0b4cc;
  --color-text-muted: #6b8099;
  --color-border: rgba(26, 140, 255, 0.2);
  --color-red: #ff3b5c;
  --font-primary: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(26, 140, 255, 0.3);
  --transition: all 0.3s ease;
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--color-accent-light);
}

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

ul, ol {
  list-style: none;
}

/* ---- Container ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

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

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.2rem; }

p {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #1a8cff, #0055cc);
  color: #fff;
  box-shadow: 0 4px 20px rgba(26, 140, 255, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3aa0ff, #1a6fe0);
  box-shadow: 0 6px 28px rgba(26, 140, 255, 0.6);
  transform: translateY(-2px);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: #fff;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.9rem;
}

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

.section-sm {
  padding: 50px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 50px;
}

.section-label {
  display: inline-block;
  background: rgba(26, 140, 255, 0.15);
  color: var(--color-accent);
  border: 1px solid rgba(26, 140, 255, 0.3);
  border-radius: 50px;
  padding: 4px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

/* ---- Header / Navbar ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(5, 13, 26, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(5, 13, 26, 0.98);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.navbar-logo {
  width: 40px;
  height: 40px;
}

.navbar-brand-text {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.navbar-brand-text span {
  color: var(--color-accent);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text-primary);
  background: rgba(26, 140, 255, 0.1);
}

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

/* Dropdown */
.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 180px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px;
  box-shadow: var(--shadow-card);
  z-index: 100;
}

.nav-item:hover .dropdown-menu {
  display: block;
}

.dropdown-item {
  display: block;
  padding: 10px 14px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.dropdown-item:hover {
  background: rgba(26, 140, 255, 0.1);
  color: var(--color-text-primary);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- Hero / Slider ---- */
.hero-slider {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
}

.slide.active {
  opacity: 1;
}

.slide-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(5, 13, 26, 0.85) 0%, rgba(5, 13, 26, 0.4) 60%, transparent 100%);
}

.slide-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 60px;
  max-width: 700px;
}

.slide-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(26, 140, 255, 0.2);
  border: 1px solid rgba(26, 140, 255, 0.4);
  color: var(--color-accent-light);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
  width: fit-content;
}

.slide-title {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.slide-title em {
  color: var(--color-accent);
  font-style: normal;
}

.slide-desc {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
  max-width: 500px;
}

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

/* Slider Controls */
.slider-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.slider-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.slider-dot.active {
  background: var(--color-accent);
  width: 24px;
  border-radius: 4px;
}

.slider-prev,
.slider-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: rgba(26, 140, 255, 0.2);
  border: 1px solid rgba(26, 140, 255, 0.4);
  border-radius: 50%;
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 10;
}

.slider-prev { left: 20px; }
.slider-next { right: 20px; }

.slider-prev:hover,
.slider-next:hover {
  background: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

/* ---- Stats Bar ---- */
.stats-bar {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item {
  padding: 20px;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* ---- Feature Cards ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: rgba(26, 140, 255, 0.5);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(26, 140, 255, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  color: var(--color-accent);
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text-primary);
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ---- Pricing ---- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--color-accent);
  box-shadow: 0 0 40px rgba(26, 140, 255, 0.2);
  transform: scale(1.03);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #1a8cff, #0055cc);
  color: #fff;
  padding: 4px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}

.pricing-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: 4px;
}

.pricing-price sup {
  font-size: 1.2rem;
  vertical-align: super;
}

.pricing-period {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 28px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pricing-feature-item:last-child {
  border-bottom: none;
}

.pricing-feature-item .check {
  color: var(--color-accent);
  font-size: 1rem;
  flex-shrink: 0;
}

/* ---- Download Platforms ---- */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.platform-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}

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

.platform-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.platform-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.platform-version {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ---- Article / Blog Cards ---- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.article-card:hover {
  border-color: rgba(26, 140, 255, 0.4);
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}

.article-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.article-card:hover .article-thumb img {
  transform: scale(1.05);
}

.article-category {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-accent);
  color: #fff;
  padding: 3px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}

.article-body {
  padding: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.article-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.4;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-excerpt {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

.article-footer {
  padding: 12px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.read-more {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

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

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.open {
  border-color: rgba(26, 140, 255, 0.4);
}

.faq-question {
  width: 100%;
  background: var(--color-bg-card);
  border: none;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--color-text-primary);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  transition: var(--transition);
}

.faq-question:hover {
  background: rgba(26, 140, 255, 0.05);
}

.faq-icon {
  width: 24px;
  height: 24px;
  background: rgba(26, 140, 255, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--color-accent);
  color: #fff;
}

.faq-answer {
  display: none;
  padding: 0 24px 20px;
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ---- CTA Banner ---- */
.cta-banner {
  background: linear-gradient(135deg, #0a1e3d 0%, #0d2a52 50%, #0a1e3d 100%);
  border: 1px solid rgba(26, 140, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(26, 140, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.cta-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 500px;
  margin: 0 auto 32px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---- Trust Badges ---- */
.trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  padding: 30px 0;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.trust-icon {
  width: 36px;
  height: 36px;
  background: rgba(26, 140, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1rem;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand-text {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
}

.footer-brand-text span {
  color: var(--color-accent);
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 36px;
  height: 36px;
  background: rgba(26, 140, 255, 0.1);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.footer-link:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

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

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

.footer-legal a {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-legal a:hover {
  color: var(--color-accent);
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: 16px 0;
  flex-wrap: wrap;
}

.breadcrumb-item a {
  color: var(--color-text-muted);
}

.breadcrumb-item a:hover {
  color: var(--color-accent);
}

.breadcrumb-separator {
  color: var(--color-text-muted);
  font-size: 0.7rem;
}

.breadcrumb-item.active {
  color: var(--color-text-secondary);
}

/* ---- Pagination ---- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
}

.page-item {
  display: flex;
}

.page-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
  background: var(--color-bg-card);
}

.page-link:hover,
.page-item.active .page-link {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* ---- Article Detail ---- */
.article-detail {
  max-width: 860px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 32px;
}

.article-detail-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-detail-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.article-detail-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-cover {
  width: 100%;
  border-radius: var(--radius-lg);
  margin-bottom: 32px;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.article-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.article-content h2 {
  font-size: 1.5rem;
  color: var(--color-text-primary);
  margin: 32px 0 16px;
}

.article-content h3 {
  font-size: 1.2rem;
  color: var(--color-text-primary);
  margin: 24px 0 12px;
}

.article-content p {
  margin-bottom: 16px;
}

.article-content ul,
.article-content ol {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 16px;
  color: var(--color-text-secondary);
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  border-left: 4px solid var(--color-accent);
  padding: 16px 20px;
  background: rgba(26, 140, 255, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* ---- Sidebar ---- */
.sidebar {
  position: sticky;
  top: 90px;
}

.sidebar-widget {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-article {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-article:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-article-thumb {
  width: 70px;
  height: 50px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}

.sidebar-article-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sidebar-article-date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ---- Tags ---- */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background: rgba(26, 140, 255, 0.1);
  border: 1px solid rgba(26, 140, 255, 0.2);
  color: var(--color-accent-light);
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  transition: var(--transition);
}

.tag:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* ---- Download Page Specific ---- */
.download-hero {
  padding: 120px 0 60px;
  text-align: center;
  background: radial-gradient(ellipse at center top, rgba(26, 140, 255, 0.1) 0%, transparent 60%);
}

.download-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.download-tab {
  padding: 10px 24px;
  border-radius: 50px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.download-tab.active,
.download-tab:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.download-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  align-items: center;
  gap: 40px;
  margin-bottom: 24px;
}

.download-card-icon {
  font-size: 4rem;
  flex-shrink: 0;
}

.download-card-info {
  flex: 1;
}

.download-card-name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.download-card-desc {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.download-card-meta {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.download-card-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-shrink: 0;
}

/* ---- Page Header ---- */
.page-header {
  padding: 120px 0 60px;
  background: linear-gradient(180deg, rgba(26, 140, 255, 0.05) 0%, transparent 100%);
  border-bottom: 1px solid var(--color-border);
}

.page-header-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 12px;
}

.page-header-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 600px;
}

/* ---- Utility ---- */
.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-40 { margin-bottom: 40px; }
.mb-50 { margin-bottom: 50px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.w-100 { width: 100%; }

.badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
}

.badge-blue {
  background: rgba(26, 140, 255, 0.15);
  color: var(--color-accent);
  border: 1px solid rgba(26, 140, 255, 0.3);
}

.badge-red {
  background: rgba(255, 59, 92, 0.15);
  color: var(--color-red);
  border: 1px solid rgba(255, 59, 92, 0.3);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .pricing-card.featured { transform: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .platform-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .navbar-nav { display: none; }
  .menu-toggle { display: flex; }
  .navbar-actions .btn-outline { display: none; }

  .slide-content { padding: 0 24px; }
  .slide-title { font-size: 2rem; }

  .features-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .trust-bar { gap: 20px; }
  .download-card { flex-direction: column; text-align: center; }
  .download-card-meta { justify-content: center; }
  .download-card-actions { width: 100%; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .section { padding: 50px 0; }
  .cta-banner { padding: 40px 20px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .slide-actions { flex-direction: column; }
  .cta-actions { flex-direction: column; align-items: center; }
}

/* ---- Mobile Nav ---- */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(5, 13, 26, 0.98);
  z-index: 999;
  flex-direction: column;
  padding: 80px 24px 40px;
  overflow-y: auto;
}

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

.mobile-nav-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background: rgba(26, 140, 255, 0.1);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-primary);
  font-size: 1.2rem;
}

.mobile-nav-link {
  display: block;
  padding: 16px 0;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.mobile-nav-link:hover {
  color: var(--color-accent);
  padding-left: 8px;
}

/* ---- Scroll to top ---- */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 100;
  border: none;
  box-shadow: 0 4px 16px rgba(26, 140, 255, 0.4);
}

.scroll-top.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Notice Bar ---- */
.notice-bar {
  background: linear-gradient(90deg, #0a1e3d, #1a3a6b, #0a1e3d);
  padding: 10px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(26, 140, 255, 0.2);
}

.notice-bar a {
  color: var(--color-accent-light);
  font-weight: 600;
}

/* ---- World Map Section ---- */
.world-map-section {
  position: relative;
  overflow: hidden;
}

.world-map-img {
  width: 100%;
  border-radius: var(--radius-lg);
  opacity: 0.9;
}

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

.testimonial-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.testimonial-stars {
  color: #ffc107;
  font-size: 0.9rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

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

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), #0055cc);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.testimonial-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

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

@media (max-width: 768px) {
  .testimonials-grid { grid-template-columns: 1fr; }
}