/* ============================================
   HHPoker Resource Center - Design System
   Blue + Gold + White | Glassmorphism | Modern
   ============================================ */

/* CSS Variables - Design Tokens */
:root {
  /* Primary Colors */
  --color-primary: #0066FF;
  --color-primary-dark: #0044CC;
  --color-primary-light: #3385FF;
  --color-primary-lighter: #E6F0FF;

  /* Gold Accent */
  --color-gold: #D4A537;
  --color-gold-light: #F0C75E;
  --color-gold-dark: #B8902A;

  /* Neutrals */
  --color-dark: #0A1628;
  --color-dark-2: #13243D;
  --color-dark-3: #1E3556;
  --color-text: #1A2332;
  --color-text-secondary: #5A6B7E;
  --color-text-light: #8899AA;
  --color-white: #FFFFFF;
  --color-bg: #F7F9FC;
  --color-bg-alt: #EEF2F8;
  --color-border: #E2E8F0;
  --color-border-light: #F0F4F8;

  /* Semantic */
  --color-success: #00C896;
  --color-warning: #FFB800;
  --color-danger: #FF4757;
  --color-info: #0066FF;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0066FF 0%, #0044CC 100%);
  --gradient-gold: linear-gradient(135deg, #F0C75E 0%, #D4A537 100%);
  --gradient-dark: linear-gradient(135deg, #0A1628 0%, #1E3556 100%);
  --gradient-hero: linear-gradient(135deg, #0A1628 0%, #13243D 40%, #0044CC 100%);
  --gradient-card: linear-gradient(135deg, #FFFFFF 0%, #F7F9FC 100%);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.10);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.12);
  --shadow-blue: 0 8px 30px rgba(0, 102, 255, 0.20);
  --shadow-gold: 0 8px 30px rgba(212, 165, 55, 0.20);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Layout */
  --container-max: 1200px;
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--color-primary-dark);
}

ul, ol {
  list-style: none;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

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

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p { margin-bottom: var(--space-md); }

.text-center { text-align: center; }
.text-gold { color: var(--color-gold); }
.text-primary { color: var(--color-primary); }
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 102, 255, 0.30);
  color: var(--color-white);
}

.btn-gold {
  background: var(--gradient-gold);
  color: var(--color-dark);
  box-shadow: var(--shadow-gold);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(212, 165, 55, 0.30);
  color: var(--color-dark);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  color: var(--color-white);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* Header / Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  height: var(--header-height);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-dark);
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.125rem;
  font-weight: 900;
}

.logo span {
  color: var(--color-gold);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.main-nav a {
  padding: 0.5rem 0.875rem;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-lighter);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 0.5rem;
  cursor: pointer;
  background: none;
  border: none;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* Hero Section */
.hero {
  position: relative;
  background: var(--gradient-hero);
  color: var(--color-white);
  padding: var(--space-4xl) 0;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/tech-bg.png') center/cover;
  opacity: 0.15;
}

.hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-content h1 {
  color: var(--color-white);
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.hero-content .hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: var(--space-xl);
  line-height: 1.6;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.375rem 1rem;
  background: rgba(212, 165, 55, 0.15);
  border: 1px solid rgba(212, 165, 55, 0.3);
  border-radius: var(--radius-full);
  color: var(--color-gold-light);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

.hero-meta span {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.hero-image {
  position: relative;
}

.hero-image img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* Page Hero (for sub-pages) */
.page-hero {
  position: relative;
  background: var(--gradient-hero);
  color: var(--color-white);
  padding: var(--space-3xl) 0;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/tech-bg.png') center/cover;
  opacity: 0.1;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  color: var(--color-white);
  font-size: 2.25rem;
  margin-bottom: var(--space-sm);
}

.page-hero p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.125rem;
  max-width: 640px;
}

.page-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

/* Breadcrumb */
.breadcrumb {
  padding: var(--space-md) 0;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

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

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

.breadcrumb span {
  margin: 0 var(--space-sm);
  color: var(--color-text-light);
}

.breadcrumb .current {
  color: var(--color-text);
  font-weight: 500;
}

/* Hub Layout */
.hub-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-2xl);
  padding: var(--space-2xl) 0;
}

.hub-main {
  min-width: 0;
}

.hub-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-md));
  align-self: start;
}

/* Section */
.section {
  padding: var(--space-3xl) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-title h2 {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.section-title p {
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
}

/* Cards */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-base);
  border: 1px solid var(--color-border-light);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-body {
  padding: var(--space-lg);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

/* Grid */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Feature Card */
.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  text-align: center;
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-primary-light);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  font-size: 1.5rem;
}

.feature-icon.blue { background: var(--color-primary-lighter); color: var(--color-primary); }
.feature-icon.gold { background: rgba(212, 165, 55, 0.12); color: var(--color-gold); }
.feature-icon.green { background: rgba(0, 200, 150, 0.12); color: var(--color-success); }
.feature-icon.purple { background: rgba(114, 137, 218, 0.12); color: #7289DA; }

.feature-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* Hub Grid Card */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.hub-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  display: block;
  text-decoration: none;
  color: inherit;
}

.hub-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-primary-light);
  color: inherit;
}

.hub-card h3 {
  font-size: 1.125rem;
  color: var(--color-dark);
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.hub-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.hub-card .arrow {
  color: var(--color-primary);
  font-size: 0.875rem;
  margin-top: var(--space-sm);
  display: inline-block;
}

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

.article-content h2 {
  font-size: 1.5rem;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary-lighter);
}

.article-content h3 {
  font-size: 1.25rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.article-content p {
  margin-bottom: var(--space-md);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

.article-content ul li,
.article-content ol li {
  margin-bottom: var(--space-sm);
  list-style: disc;
}

.article-content ol li {
  list-style: decimal;
}

.article-content img {
  border-radius: var(--radius-lg);
  margin: var(--space-lg) 0;
  box-shadow: var(--shadow-md);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.article-content table th {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-md);
  text-align: left;
  font-weight: 600;
}

.article-content table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.article-content table tr:nth-child(even) td {
  background: var(--color-bg-alt);
}

.article-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  background: var(--color-primary-lighter);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text);
}

.article-content strong {
  font-weight: 700;
  color: var(--color-dark);
}

.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: rgba(0, 102, 255, 0.3);
}

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

/* Summary Box */
.summary-box {
  background: linear-gradient(135deg, var(--color-primary-lighter) 0%, rgba(212, 165, 55, 0.08) 100%);
  border: 1px solid rgba(0, 102, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
}

.summary-box h3 {
  color: var(--color-primary);
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

.summary-box p {
  margin-bottom: 0;
  color: var(--color-text);
}

/* Table of Contents */
.toc {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
}

.toc h3 {
  font-size: 1rem;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.toc ol {
  padding-left: var(--space-lg);
}

.toc ol li {
  list-style: decimal;
  margin-bottom: var(--space-xs);
  font-size: 0.9375rem;
}

.toc ol li a {
  color: var(--color-text-secondary);
}

.toc ol li a:hover {
  color: var(--color-primary);
}

/* Content Image */
.content-img {
  width: 100%;
  border-radius: var(--radius-lg);
  margin: var(--space-lg) 0;
  box-shadow: var(--shadow-md);
}

/* FAQ Section */
.faq-section {
  margin: var(--space-2xl) 0;
}

.faq-section h2 {
  margin-bottom: var(--space-lg);
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item.active {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  padding: var(--space-md) var(--space-lg);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-dark);
  font-size: 1rem;
  user-select: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: transform var(--transition-base);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
  padding: 0 var(--space-lg);
  color: var(--color-text-secondary);
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 var(--space-lg) var(--space-md);
}

/* Author & Meta */
.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-lg);
}

.author-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
  font-size: 1rem;
}

.author-name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-dark);
}

.author-role {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.article-date {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* Prev/Next Navigation */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin: var(--space-2xl) 0;
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
}

.post-nav-item {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.post-nav-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.post-nav-label {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.post-nav-title {
  font-weight: 600;
  color: var(--color-dark);
  font-size: 0.9375rem;
}

.post-nav-next {
  text-align: right;
}

/* Related Articles */
.related-articles {
  margin: var(--space-2xl) 0;
}

.related-articles h2 {
  margin-bottom: var(--space-lg);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.related-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
}

.related-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: inherit;
}

.related-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.related-card-body {
  padding: var(--space-md);
}

.related-card h4 {
  font-size: 0.9375rem;
  margin-bottom: var(--space-xs);
  color: var(--color-dark);
}

.related-card p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* Sidebar Widgets */
.widget {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  margin-bottom: var(--space-lg);
}

.widget h3 {
  font-size: 1.0625rem;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary-lighter);
  color: var(--color-dark);
}

.widget-list li {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.widget-list li:last-child {
  border-bottom: none;
}

.widget-list a {
  color: var(--color-text);
  font-size: 0.9375rem;
  display: block;
  transition: color var(--transition-fast);
}

.widget-list a:hover {
  color: var(--color-primary);
}

.widget-list .date {
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-top: 2px;
}

/* Download Module */
.download-box {
  background: linear-gradient(135deg, #0A1628 0%, #13243D 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  color: var(--color-white);
  text-align: center;
  margin: var(--space-xl) 0;
  position: relative;
  overflow: hidden;
}

.download-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.2) 0%, transparent 70%);
}

.download-box h3 {
  color: var(--color-white);
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  position: relative;
}

.download-box p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-lg);
  position: relative;
}

.download-options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  position: relative;
}

.download-options .btn {
  min-width: 140px;
}

/* CTA Button (inline in article) */
.download-cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  margin: var(--space-lg) 0;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.download-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/tech-bg.png') center/cover;
  opacity: 0.1;
}

.download-cta h3 {
  color: var(--color-white);
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  position: relative;
}

.download-cta p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-md);
  position: relative;
}

.download-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  position: relative;
}

.download-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: var(--gradient-gold);
  color: var(--color-dark);
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(212, 165, 55, 0.4);
}

.download-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(212, 165, 55, 0.5);
}

.download-cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.download-cta-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
}

/* Download Modal */
.download-modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 22, 40, 0.7);
  backdrop-filter: blur(8px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.download-modal-overlay.active {
  display: flex;
}

.download-modal {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  max-width: 440px;
  width: 100%;
  padding: var(--space-2xl);
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-xl);
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.download-modal .modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 32px;
  height: 32px;
  border: none;
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.download-modal .modal-close:hover {
  background: var(--color-border);
}

.download-modal-icon {
  width: 64px;
  height: 64px;
  background: var(--color-primary-lighter);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  font-size: 2rem;
}

.download-modal h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--color-dark);
}

.download-modal p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.modal-wechat-box {
  background: linear-gradient(135deg, #07C160 0%, #06AD56 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  color: var(--color-white);
}

.modal-wechat-box .wechat-label {
  font-size: 0.8125rem;
  opacity: 0.9;
  margin-bottom: var(--space-xs);
}

.modal-wechat-box .wechat-number {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.modal-wechat-box .wechat-number:hover {
  opacity: 0.85;
}

.modal-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 2rem;
  background: #07C160;
  color: var(--color-white);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 15px rgba(7, 193, 96, 0.3);
}

.modal-copy-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(7, 193, 96, 0.4);
}

.modal-copy-btn.copied {
  background: var(--color-primary);
}

/* Floating Service Widget */
.floating-service {
  position: fixed;
  right: var(--space-lg);
  bottom: var(--space-2xl);
  z-index: 900;
}

.floating-service-btn {
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  color: var(--color-white);
  font-size: 1.5rem;
}

.floating-service-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 40px rgba(0, 102, 255, 0.4);
}

.floating-service-panel {
  display: block;
  position: absolute;
  bottom: 70px;
  right: 0;
  width: 280px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  animation: panelSlideUp 0.3s ease;
}

@keyframes panelSlideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-close {
  position: absolute;
  top: 8px;
  right: 10px;
  width: 24px;
  height: 24px;
  border: none;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 50%;
  font-size: 16px;
  line-height: 1;
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  padding: 0;
}

.panel-close:hover {
  background: rgba(0, 0, 0, 0.12);
  color: var(--color-dark);
}

.floating-service-panel h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-dark);
}

.floating-service-panel .wechat-id {
  background: rgba(7, 193, 96, 0.08);
  border: 1px solid rgba(7, 193, 96, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  margin: var(--space-sm) 0;
}

.floating-service-panel .wechat-id .label {
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.floating-service-panel .wechat-id .number {
  font-size: 1.25rem;
  font-weight: 800;
  color: #07C160;
  letter-spacing: 0.05em;
}

.floating-service-panel .copy-btn {
  display: block;
  width: 100%;
  padding: 0.625rem;
  background: #07C160;
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.floating-service-panel .copy-btn:hover {
  background: #06AD56;
}

.floating-service-panel .copy-btn.copied {
  background: var(--color-primary);
}

/* Toast */
.toast {
  position: fixed;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-dark);
  color: var(--color-white);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 10000;
  opacity: 0;
  transition: all var(--transition-base);
  font-size: 0.9375rem;
  font-weight: 500;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Version Info Table */
.version-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.version-table th {
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--space-md);
  text-align: left;
  font-weight: 600;
}

.version-table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-white);
}

.version-table tr:hover td {
  background: var(--color-primary-lighter);
}

.version-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--gradient-gold);
  color: var(--color-dark);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

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

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
}

.testimonial-card .stars {
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
  font-size: 0.875rem;
}

.testimonial-card p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}

.testimonial-card .user {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.testimonial-card .user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.testimonial-card .user-name {
  font-weight: 600;
  font-size: 0.875rem;
}

.testimonial-card .user-role {
  font-size: 0.75rem;
  color: var(--color-text-light);
}

/* Friend Links */
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

.friend-links a {
  padding: 0.5rem 1rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.friend-links a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

/* Footer */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-3xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand h3 {
  color: var(--color-white);
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: var(--space-md);
}

.footer-col ul li {
  margin-bottom: var(--space-sm);
}

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
}

/* Scroll Animation */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stats Section */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}

.stat-item .stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

/* Announcement */
.announcement-bar {
  background: var(--gradient-gold);
  color: var(--color-dark);
  padding: 0.625rem 0;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
}

.announcement-bar a {
  color: var(--color-dark);
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-image {
    max-width: 500px;
    margin: 0 auto;
  }

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

  .hub-layout {
    grid-template-columns: 1fr;
  }

  .hub-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }

  .hero {
    padding: var(--space-2xl) 0;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content .hero-subtitle {
    font-size: 1rem;
  }

  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-md);
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--color-border);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

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

  .main-nav a {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    width: 100%;
  }

  .menu-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

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

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .post-nav {
    grid-template-columns: 1fr;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

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

  .floating-service {
    right: var(--space-md);
    bottom: var(--space-md);
  }

  .section {
    padding: var(--space-2xl) 0;
  }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-alt);
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-light);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

/* Print */
@media print {
  .site-header, .site-footer, .floating-service, .breadcrumb, .hub-sidebar {
    display: none;
  }
}