/* ============================================
   忽闪忽闪科技 官网 - 全局样式
   对标 Zoho.com 极简现代商务风
   ============================================ */

/* ---------- CSS Variables / Design Tokens ---------- */
:root {
  /* Brand Colors */
  --color-primary: #D4382C;
  --color-primary-dark: #B02A20;
  --color-primary-light: #E8574B;
  --color-secondary: #1A73E8;
  --color-accent: #FF6D00;

  /* Neutrals */
  --color-white: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F7F8FA;
  --color-bg-dark: #1B1B1B;
  --color-surface: #FFFFFF;
  --color-border: #E0E0E0;
  --color-border-light: #F0F0F0;

  /* Text */
  --color-text: #2D2D2D;
  --color-text-secondary: #6B6B6B;
  --color-text-muted: #999999;
  --color-text-inverse: #FFFFFF;

  /* Dark Mode */
  --dm-bg: #121212;
  --dm-bg-alt: #1E1E1E;
  --dm-surface: #2A2A2A;
  --dm-border: #333333;
  --dm-text: #E0E0E0;
  --dm-text-secondary: #AAAAAA;
  --dm-text-muted: #777777;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  /* 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;
  --space-5xl: 8rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

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

/* ---------- Dark Mode Variables ---------- */
[data-theme="dark"] {
  --color-bg: var(--dm-bg);
  --color-bg-alt: var(--dm-bg-alt);
  --color-surface: var(--dm-surface);
  --color-border: var(--dm-border);
  --color-border-light: #2A2A2A;
  --color-text: var(--dm-text);
  --color-text-secondary: var(--dm-text-secondary);
  --color-text-muted: var(--dm-text-muted);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  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;
}

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  line-height: var(--line-height-tight);
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

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

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .navbar {
  background: rgba(18,18,18,0.95);
}

[data-theme="dark"] .navbar.scrolled {
  border-bottom-color: var(--dm-border);
}

[data-theme="dark"] .nav-links {
  background: var(--dm-bg);
}

[data-theme="dark"] .products-dropdown {
  background: var(--dm-surface);
}

[data-theme="dark"] .nav-links a {
  border-bottom-color: var(--dm-border);
}

.navbar .container {
  display: flex;
  align-items: center;
  height: 100%;
  gap: var(--space-xl);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}

.navbar-brand img {
  height: 32px;
  width: auto;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex: 1;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
  background: var(--color-bg-alt);
}

/* Products dropdown */
.nav-products-trigger {
  position: relative;
}

.nav-products-trigger .dropdown-arrow {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  margin-left: 4px;
  vertical-align: middle;
  transition: transform var(--transition-fast);
}

.nav-products-trigger:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.products-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding-top: var(--space-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 1001;
}

.nav-products-trigger:hover .products-dropdown {
  opacity: 1;
  visibility: visible;
}

.products-dropdown-inner {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  min-width: 480px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.product-dropdown-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  cursor: pointer;
}

.product-dropdown-card:hover {
  background: var(--color-bg-alt);
}

.product-dropdown-card .icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.product-dropdown-card .info h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 2px;
}

.product-dropdown-card .info p {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  line-height: 1.4;
  overflow-wrap: break-word;
  word-break: break-word;
}

/* Nav right section */
.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-left: auto;
}

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-switcher button {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.lang-switcher button:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 1002;
}

.lang-switcher:hover .lang-dropdown,
.lang-switcher.open .lang-dropdown {
  opacity: 1;
  visibility: visible;
}

.lang-dropdown button {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-lg);
  text-align: left;
  border: none;
  border-radius: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.lang-dropdown button:hover,
.lang-dropdown button.active {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

/* Theme Toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  font-size: 18px;
}

.theme-toggle:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 10px;
  margin: -10px;
  cursor: pointer;
  z-index: 1003;
  background: transparent;
  border: none;
  outline: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--transition-normal);
  pointer-events: none;
}

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

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(212,56,44,0.3);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-text);
  background: var(--color-bg-alt);
}

.btn-lg {
  padding: 16px 36px;
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-sm);
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + var(--space-4xl)) var(--space-xl) var(--space-4xl);
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212,56,44,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,115,232,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero h1 {
  font-size: var(--font-size-6xl);
  font-weight: 800;
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero .hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  line-height: var(--line-height-relaxed);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero .hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero .hero-privacy {
  margin-top: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.hero .hero-privacy a {
  color: var(--color-primary);
  font-weight: 500;
}

/* ---------- Section Styles ---------- */
.section {
  padding: var(--space-5xl) 0;
}

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

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.section-header .overline {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}

/* ---------- Product Cards ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

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

.product-card .card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: 28px;
}

.product-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
}

.badge-soon {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 20px;
  background: rgba(212, 56, 44, 0.1);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.product-card .card-desc {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-lg);
  line-height: var(--line-height-relaxed);
}

.product-card .card-platforms {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
}

.product-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
}

.product-card:hover .card-link {
  gap: var(--space-sm);
}

/* ---------- View All Products ---------- */
.view-all {
  text-align: center;
  margin-top: var(--space-3xl);
}

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

.testimonial-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-normal);
}

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

.testimonial-card .stars {
  color: #F5A623;
  margin-bottom: var(--space-md);
  font-size: var(--font-size-lg);
}

.testimonial-card .quote {
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-lg);
  font-style: italic;
}

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

.testimonial-card .author-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
}

.testimonial-card .author-info .name {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.testimonial-card .author-info .role {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

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

.stat-item {
  text-align: center;
}

.stat-item .stat-number {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat-item .stat-label {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ---------- Values Section ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.value-card {
  text-align: center;
  padding: var(--space-2xl);
}

.value-card .value-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-size: 32px;
  background: var(--color-bg-alt);
}

.value-card h4 {
  margin-bottom: var(--space-sm);
}

.value-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

/* ---------- CTA Section ---------- */
.cta-section {
  text-align: center;
  padding: var(--space-5xl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
}

.cta-section h2 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.cta-section p {
  color: rgba(255,255,255,0.85);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section .btn-primary {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.cta-section .btn-primary:hover {
  background: rgba(255,255,255,0.9);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.cta-section .btn-secondary {
  color: var(--color-white);
  border-color: rgba(255,255,255,0.5);
}

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

/* ---------- Footer ---------- */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.7);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand {
  margin-bottom: var(--space-lg);
}

.footer-brand .brand-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  max-width: 280px;
}

.footer-col h5 {
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-lg);
}

.footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: var(--font-size-sm);
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  text-align: center;
}

.footer-bottom .copyright {
  font-size: var(--font-size-sm);
}

.footer-bottom .social-links {
  display: none;
}

.footer-bottom .social-links a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.6);
  font-size: 16px;
  transition: all var(--transition-fast);
}

.footer-bottom .social-links a:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ---------- Page Header (Inner Pages) ---------- */
.page-header {
  padding: calc(var(--nav-height) + var(--space-4xl)) 0 var(--space-3xl);
  text-align: center;
  background: var(--color-bg-alt);
}

.page-header h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-md);
}

.page-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

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

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

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

/* ---------- Products Page ---------- */
.products-filter {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
  background: transparent;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.search-box {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  margin-left: auto;
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  width: 200px;
}

.search-box .search-icon {
  color: var(--color-text-muted);
}

/* ---------- Product Detail Page ---------- */
.product-hero {
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-3xl);
}

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

.product-hero-info .overline {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}

.product-hero-info h1 {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-md);
}

.product-hero-info .tagline {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  line-height: var(--line-height-relaxed);
}

.product-hero-info .platforms {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.platform-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.platform-tag.android {
  background: #E8F5E9;
  color: #2E7D32;
  border-color: #C8E6C9;
}

.platform-tag.ios {
  background: #E3F2FD;
  color: #1565C0;
  border-color: #BBDEFB;
}

.platform-tag.harmony {
  background: #FFF3E0;
  color: #E65100;
  border-color: #FFE0B2;
}

.platform-tag.macos {
  background: #F3E5F5;
  color: #6A1B9A;
  border-color: #E1BEE7;
}

.product-hero-info .cta-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.product-hero-visual {
  position: relative;
}

.product-screenshot {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  background: var(--color-bg-alt);
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-screenshot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-screenshot .screenshot-placeholder {
  font-size: 64px;
  opacity: 0.3;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.feature-item {
  padding: var(--space-xl);
}

.feature-item .feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 24px;
  background: var(--color-bg-alt);
}

.feature-item h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-sm);
}

.feature-item p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  transition: all var(--transition-normal);
}

.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
  transform: scale(1.02);
}

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

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-4px);
}

.pricing-card .plan-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.pricing-card .plan-price {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--space-xs);
}

.pricing-card .plan-price .currency {
  font-size: var(--font-size-xl);
  vertical-align: top;
}

.pricing-card .plan-price .period {
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--color-text-muted);
}

.pricing-card .plan-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.pricing-card .plan-features {
  text-align: left;
  margin-bottom: var(--space-xl);
}

.pricing-card .plan-features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.pricing-card .plan-features li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 700;
}

/* ---------- Contact Form ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(212,56,44,0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-info-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
}

.contact-info-item {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-item .icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: var(--color-surface);
  flex-shrink: 0;
}

.contact-info-item .details h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 2px;
}

.contact-info-item .details p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.contact-hint {
  margin-top: var(--space-xs);
  font-size: var(--font-size-xs) !important;
  color: var(--color-text-muted) !important;
  font-style: italic;
}

/* ---------- About Page ---------- */
.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  padding-left: var(--space-3xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-2xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-3xl) - 5px);
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
}

.timeline-item .year {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.timeline-item h4 {
  margin-bottom: var(--space-xs);
}

.timeline-item p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.team-card {
  text-align: center;
}

.team-card .avatar {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-md);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
}

.team-card h4 {
  font-size: var(--font-size-base);
  margin-bottom: 2px;
}

.team-card .role {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ---------- Blog/News ---------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

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

.blog-card .card-image {
  aspect-ratio: 16/9;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  opacity: 0.3;
  overflow: hidden;
}

.blog-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 1;
}

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

.blog-card .card-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.blog-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

.blog-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

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

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--space-lg) 0;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
  background: none;
  border: none;
}

.faq-question::after {
  content: '+';
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
  margin-left: 1rem;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ---------- Download Center ---------- */
.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.download-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  transition: all var(--transition-normal);
}

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

.download-card .dl-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  flex-shrink: 0;
}

.download-card .dl-info h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xs);
}

.download-card .dl-info p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

/* ---------- Privacy/Terms Page ---------- */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-xl);
}

.legal-content h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

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

.legal-content p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
}

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

.legal-content ul li {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-sm);
  list-style: disc;
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 999;
  cursor: pointer;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ---------- SVG Icon System ---------- */
.icon-svg {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: middle;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.icon-svg.fill-icon {
  fill: currentColor;
  stroke: none;
}

/* Icon sizes */
.icon-svg-sm { width: 16px; height: 16px; }
.icon-svg-md { width: 20px; height: 20px; }
.icon-svg-lg { width: 24px; height: 24px; }
.icon-svg-xl { width: 32px; height: 32px; }
.icon-svg-2xl { width: 40px; height: 40px; }
.icon-svg-3xl { width: 56px; height: 56px; }
.icon-svg-4xl { width: 64px; height: 64px; }

/* Dropdown & card icons */
.product-dropdown-card .icon-svg,
.card-icon .icon-svg,
.feature-icon .icon-svg,
.dl-icon .icon-svg,
.value-icon .icon-svg,
.contact-info-item .icon .icon-svg {
  width: 60%;
  height: 60%;
}

/* Screenshot placeholder icon */
.screenshot-placeholder .icon-svg {
  width: 80px;
  height: 80px;
  opacity: 0.2;
  color: var(--color-text);
}

/* Blog card image placeholder */
.card-image .icon-svg {
  width: 48px;
  height: 48px;
  opacity: 0.2;
  color: var(--color-text);
}

/* Theme toggle icon */
.theme-toggle .icon-svg {
  width: 18px;
  height: 18px;
}

/* Language switcher icon */
.lang-switcher .icon-svg {
  width: 16px;
  height: 16px;
}

/* Social links icon */
.social-links .icon-svg {
  width: 18px;
  height: 18px;
}

/* Platform badge icon */
.platform-badge .icon-svg {
  width: 14px;
  height: 14px;
}

/* Cookie banner icon */
.cookie-banner .icon-svg {
  width: 18px;
  height: 18px;
  vertical-align: middle;
  margin-right: 4px;
}

/* Back to top icon */
.back-to-top .icon-svg {
  width: 20px;
  height: 20px;
}

/* Search icon */
.search-icon .icon-svg {
  width: 16px;
  height: 16px;
}

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

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

/* Stagger delays */
.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ---------- Loading / Skeleton ---------- */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg-alt) 25%, var(--color-border-light) 50%, var(--color-bg-alt) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---------- Cookie Consent ---------- */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) var(--space-xl);
  z-index: 9999;
  display: none;
  box-shadow: 0 -4px 12px rgba(0,0,0,0.08);
}

.cookie-banner.show {
  display: block;
}

.cookie-banner .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.cookie-banner p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.cookie-banner .btn-group {
  display: flex;
  gap: var(--space-sm);
  flex-shrink: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .products-grid,
  .testimonials-grid,
  .blog-grid,
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

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

  .product-hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .product-hero-info .platforms {
    justify-content: center;
  }

  .product-hero-info .cta-group {
    justify-content: center;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-6xl: 2.5rem;
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--space-xl);
    gap: 0;
    overflow-y: auto;
    z-index: 999;
    -webkit-overflow-scrolling: touch;
    visibility: hidden;
    opacity: 0;
    transform: translateX(100%);
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0s 0.3s;
    pointer-events: none;
  }

  .nav-links.mobile-open {
    visibility: visible;
    opacity: 1;
    transform: translateX(0);
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0s 0s;
    pointer-events: auto;
  }

  .nav-links a {
    padding: var(--space-lg) 0;
    font-size: var(--font-size-lg);
    border-bottom: 1px solid var(--color-border-light);
    width: 100%;
  }

  .hamburger {
    display: flex;
    order: 10;
  }

  /* 移动端产品下拉链接样式 */
  .nav-products-trigger {
    width: 100%;
  }

  .nav-products-trigger > a {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .product-dropdown-card {
    padding: var(--space-md);
  }

  .products-dropdown {
    position: static;
    transform: none;
    padding-top: 0;
    opacity: 1;
    visibility: visible;
    display: none;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    margin-top: var(--space-sm);
  }

  .nav-products-trigger.mobile-open .products-dropdown {
    display: block;
  }

  .nav-products-trigger.mobile-open .dropdown-arrow {
    transform: rotate(180deg);
  }

  .products-dropdown-inner {
    min-width: auto;
    grid-template-columns: 1fr;
    box-shadow: none;
    border: none;
    padding: var(--space-sm);
  }

  .product-dropdown-card {
    padding: var(--space-md);
    border-radius: var(--radius-md);
  }

  .products-grid,
  .testimonials-grid,
  .values-grid,
  .blog-grid,
  .features-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

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

  .hero {
    min-height: auto;
    padding: calc(var(--nav-height) + var(--space-3xl)) var(--space-md) var(--space-3xl);
  }

  .hero .hero-cta {
    flex-direction: column;
    align-items: center;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

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

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

  .search-box {
    width: 100%;
    margin-left: 0;
  }

  .search-box input {
    width: 100%;
  }

  .products-filter {
    flex-direction: column;
    align-items: stretch;
  }

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

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

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

  .btn-lg {
    width: 100%;
  }
}

/* ---------- Print Styles ---------- */
@media print {
  .navbar,
  .back-to-top,
  .cookie-banner,
  .theme-toggle,
  .lang-switcher {
    display: none !important;
  }

  body {
    color: #000;
    background: #fff;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }
}