:root {
  --bg-primary: #0b1020;
  --bg-secondary: #131a33;
  --bg-card: rgba(255, 255, 255, 0.06);
  --bg-card-hover: rgba(255, 255, 255, 0.1);
  --bg-glass: rgba(255, 255, 255, 0.08);
  --border-color: rgba(255, 255, 255, 0.12);
  --border-hover: rgba(79, 140, 255, 0.5);
  --text-primary: #e8ecf4;
  --text-secondary: #a0aec0;
  --text-muted: #6b7a99;
  --accent-blue: #4f8cff;
  --accent-pink: #ff5c8a;
  --accent-purple: #8b5cf6;
  --accent-cyan: #22d3ee;
  --gradient-main: linear-gradient(135deg, #0b1020 0%, #1a1f3a 40%, #2d1b4e 70%, #0b1020 100%);
  --gradient-hero: linear-gradient(135deg, #0f1729 0%, #1a1040 30%, #2a1a5e 60%, #0f1729 100%);
  --gradient-accent: linear-gradient(135deg, #4f8cff, #8b5cf6, #ff5c8a);
  --gradient-card: linear-gradient(145deg, rgba(79, 140, 255, 0.08), rgba(139, 92, 246, 0.05));
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(79, 140, 255, 0.2);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1200px;
}

[data-theme="light"] {
  --bg-primary: #f0f4fc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-glass: rgba(255, 255, 255, 0.6);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(79, 140, 255, 0.4);
  --text-primary: #1a1f36;
  --text-secondary: #4a5568;
  --text-muted: #8896ab;
  --gradient-main: linear-gradient(135deg, #e8eeff 0%, #f0e8ff 40%, #ffe8f0 70%, #e8eeff 100%);
  --gradient-hero: linear-gradient(135deg, #dce6ff 0%, #e8dcff 30%, #ffdce8 60%, #dce6ff 100%);
  --gradient-card: linear-gradient(145deg, rgba(79, 140, 255, 0.06), rgba(139, 92, 246, 0.04));
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(79, 140, 255, 0.15);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition-smooth), color var(--transition-smooth);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: var(--gradient-main);
  opacity: 0.6;
  z-index: -2;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(79, 140, 255, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 92, 138, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 60%);
  z-index: -1;
  pointer-events: none;
}

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

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

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

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

::selection {
  background: rgba(79, 140, 255, 0.35);
  color: #fff;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-blue);
}

#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(11, 16, 32, 0.75);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
}

[data-theme="light"] #site-header {
  background: rgba(240, 244, 252, 0.8);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(11, 16, 32, 0.92);
}

[data-theme="light"] #site-header.scrolled {
  background: rgba(240, 244, 252, 0.95);
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 24px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 16px;
}

.top-bar p {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.top-bar nav {
  display: flex;
  gap: 16px;
  flex-shrink: 0;
}

.top-bar nav a {
  color: var(--text-muted);
  font-size: 0.8rem;
  position: relative;
}

.top-bar nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-blue);
  transition: width var(--transition-fast);
}

.top-bar nav a:hover {
  color: var(--accent-blue);
}

.top-bar nav a:hover::after {
  width: 100%;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand svg {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  transition: transform var(--transition-bounce), box-shadow var(--transition-smooth);
}

.brand:hover svg {
  transform: rotate(-5deg) scale(1.08);
  box-shadow: var(--shadow-glow);
}

.brand div {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand strong {
  font-size: 1.15rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand span {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.main-nav > nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.main-nav > nav ul {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: center;
}

.main-nav > nav ul li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.main-nav > nav ul li a::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-sm);
  background: var(--gradient-card);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -1;
}

.main-nav > nav ul li a:hover {
  color: var(--text-primary);
}

.main-nav > nav ul li a:hover::before {
  opacity: 1;
}

.main-nav form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 2px 2px 2px 16px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  flex-shrink: 0;
}

.main-nav form[role="search"]:focus-within {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.15);
}

.main-nav form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.main-nav form[role="search"] input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.82rem;
  width: 140px;
  padding: 6px 0;
  transition: width var(--transition-smooth);
}

.main-nav form[role="search"] input::placeholder {
  color: var(--text-muted);
}

.main-nav form[role="search"] input:focus {
  width: 180px;
}

.main-nav form[role="search"] button {
  padding: 6px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-accent);
  border-radius: 50px;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.main-nav form[role="search"] button:hover {
  opacity: 0.85;
  transform: scale(1.03);
}

#theme-toggle,
#menu-toggle {
  padding: 8px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

#theme-toggle:hover,
#menu-toggle:hover {
  color: var(--text-primary);
  border-color: var(--accent-blue);
  background: rgba(79, 140, 255, 0.1);
  transform: translateY(-1px);
}

#menu-toggle {
  display: none;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 60px;
}

section {
  margin-bottom: 64px;
  scroll-margin-top: 100px;
}

section h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
  letter-spacing: -0.02em;
}

section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

section h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text-primary);
  position: relative;
  padding-left: 16px;
}

section h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 18px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

section h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 20px 0 8px;
  color: var(--accent-blue);
}

section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 0.95rem;
  line-height: 1.85;
}

section ul,
section ol {
  margin: 12px 0 20px;
  padding-left: 0;
}

section ul li,
section ol li {
  position: relative;
  padding: 6px 0 6px 28px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

section ul li::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  transition: transform var(--transition-fast);
}

section ol {
  counter-reset: item;
}

section ol li::before {
  content: counter(item);
  counter-increment: item;
  position: absolute;
  left: 0;
  top: 7px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-accent);
  border-radius: 50%;
}

section ul li:hover,
section ol li:hover {
  color: var(--text-primary);
  transform: translateX(4px);
}

section ul li:hover::before {
  transform: scale(1.3);
}

#hero {
  position: relative;
  padding: 80px 0 60px;
  text-align: center;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 140%;
  height: 200%;
  background: var(--gradient-hero);
  opacity: 0.5;
  border-radius: 50%;
  z-index: -1;
  animation: heroGlow 12s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 0.4;
  }
  50% {
    transform: translate(3%, -3%) scale(1.05);
    opacity: 0.55;
  }
  100% {
    transform: translate(-2%, 2%) scale(1.02);
    opacity: 0.45;
  }
}

#hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 900;
  line-height: 1.35;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-blue) 40%, var(--accent-purple) 70%, var(--accent-pink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeInUp 0.8s ease-out both;
}

#hero > p {
  max-width: 800px;
  margin: 0 auto 16px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.9;
  animation: fadeInUp 0.8s ease-out 0.15s both;
}

#hero > p:last-of-type {
  font-size: 0.85rem;
  color: var(--text-muted);
  animation-delay: 0.25s;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 32px 0 48px;
  animation: fadeInUp 0.8s ease-out 0.35s both;
}

.hero-actions a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: 50px;
  transition: all var(--transition-bounce);
  position: relative;
  overflow: hidden;
}

.hero-actions a:first-child {
  color: #fff;
  background: var(--gradient-accent);
  box-shadow: 0 4px 20px rgba(79, 140, 255, 0.35);
}

.hero-actions a:first-child:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 32px rgba(79, 140, 255, 0.5);
  color: #fff;
}

.hero-actions a:last-child {
  color: var(--text-primary);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hero-actions a:last-child:hover {
  border-color: var(--accent-blue);
  background: rgba(79, 140, 255, 0.1);
  transform: translateY(-3px) scale(1.03);
  color: var(--text-primary);
}

.hero-carousel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 40px 0;
  animation: fadeInUp 0.8s ease-out 0.45s both;
}

.hero-carousel article {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  text-align: left;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.hero-carousel article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-smooth);
}

.hero-carousel article:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.hero-carousel article:hover::before {
  transform: scaleX(1);
}

.hero-carousel article h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  padding-bottom: 0;
  color: var(--text-primary);
}

.hero-carousel article h2::after {
  display: none;
}

.hero-carousel article p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
  animation: fadeInUp 0.8s ease-out 0.55s both;
}

.stats > div {
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  text-align: center;
  transition: all var(--transition-smooth);
}

.stats > div:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.stats dt {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.stats dd {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

nav[aria-label="面包屑导航"] {
  margin-bottom: 40px;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 0;
  margin: 0;
}

nav[aria-label="面包屑导航"] ol li {
  padding: 0;
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

nav[aria-label="面包屑导航"] ol li::before {
  display: none;
}

nav[aria-label="面包屑导航"] ol li + li::before {
  content: '/';
  color: var(--text-muted);
  opacity: 0.5;
}

nav[aria-label="面包屑导航"] ol li a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

nav[aria-label="面包屑导航"] ol li a:hover {
  color: var(--accent-blue);
}

nav[aria-label="面包屑导航"] ol li[aria-current="page"] {
  color: var(--accent-blue);
  font-weight: 600;
}

#about,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links,
#privacy,
#terms,
#security {
  padding: 40px 0;
}

#products ul,
#solutions ul,
#howto ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

#products ul li,
#solutions ul li,
#howto ul li {
  padding: 16px 20px 16px 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-smooth);
}

#products ul li::before,
#solutions ul li::before,
#howto ul li::before {
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
}

#products ul li:hover,
#solutions ul li:hover,
#howto ul li:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-sm);
}

#cases blockquote {
  position: relative;
  padding: 24px 28px 24px 48px;
  margin: 16px 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-smooth);
}

#cases blockquote::before {
  content: '"';
  position: absolute;
  left: 18px;
  top: 8px;
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.6;
}

#cases blockquote:hover {
  transform: translateX(6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

#cases blockquote p {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

#cases blockquote cite {
  display: block;
  font-size: 0.82rem;
  font-style: normal;
  color: var(--accent-blue);
  font-weight: 600;
}

#news article {
  padding: 24px 28px;
  margin-bottom: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

#news article::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-smooth);
}

#news article:hover {
  transform: translateX(6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

#news article:hover::before {
  transform: scaleY(1);
}

#news article h3 {
  font-size: 1.1rem;
  margin: 0 0 8px;
  padding-left: 0;
}

#news article h3::before {
  display: none;
}

#news article p:first-of-type {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

#articles article {
  padding: 24px 28px;
  margin-bottom: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

#articles article::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(79, 140, 255, 0.08) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  pointer-events: none;
}

#articles article:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

#articles article:hover::after {
  opacity: 1;
}

#articles article h3 {
  font-size: 1.1rem;
  margin: 0 0 8px;
  padding-left: 0;
  transition: color var(--transition-fast);
}

#articles article h3::before {
  display: none;
}

#articles article:hover h3 {
  color: var(--accent-blue);
}

#articles article p:first-of-type {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-top: 8px;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

#articles article a::after {
  content: '→';
  transition: transform var(--transition-fast);
}

#articles article a:hover {
  color: var(--accent-cyan);
  gap: 10px;
}

#articles article a:hover::after {
  transform: translateX(4px);
}

#faq details {
  margin-bottom: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  transition: all var(--transition-smooth);
}

#faq details:hover {
  border-color: var(--border-hover);
}

#faq details[open] {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
  background: var(--bg-card-hover);
}

#faq details summary {
  padding: 18px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: color var(--transition-fast);
  position: relative;
}

#faq details summary::-webkit-details-marker {
  display: none;
}

#faq details summary::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--accent-blue);
  transition: transform var(--transition-smooth), color var(--transition-fast);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(79, 140, 255, 0.1);
}

#faq details[open] summary::after {
  content: '−';
  transform: rotate(180deg);
  background: rgba(79, 140, 255, 0.2);
}

#faq details summary:hover {
  color: var(--accent-blue);
}

#faq details p {
  padding: 0 24px 20px;
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.8;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#howto ol {
  counter-reset: item;
  display: grid;
  gap: 12px;
}

#howto ol li {
  padding: 18px 24px 18px 56px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-smooth);
  position: relative;
}

#howto ol li::before {
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  font-size: 0.75rem;
}

#howto ol li:hover {
  transform: translateX(6px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-sm);
}

#contact ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

#contact ul li {
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 0.88rem;
  transition: all var(--transition-smooth);
}

#contact ul li::before {
  display: none;
}

#contact ul li:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#sitemap ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}

#sitemap ul li {
  padding: 12px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition-smooth);
}

#sitemap ul li::before {
  display: none;
}

#sitemap ul li a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

#sitemap ul li:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

#sitemap ul li:hover a {
  color: var(--accent-blue);
}

#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

#links ul li {
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  transition: all var(--transition-smooth);
}

#links ul li::before {
  display: none;
}

#links ul li a {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

#links ul li:hover {
  border-color: var(--border-hover);
  background: rgba(79, 140, 255, 0.1);
  transform: translateY(-2px);
}

#links ul li:hover a {
  color: var(--accent-blue);
}

#privacy,
#terms,
#security {
  padding: 32px 0;
  border-top: 1px solid var(--border-color);
}

#privacy p,
#terms p,
#security p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.8;
}

footer {
  border-top: 1px solid var(--border-color);
  padding: 32px 24px;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

footer p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

footer nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

footer nav a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

footer nav a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-blue);
  transition: width var(--transition-fast);
}

footer nav a:hover {
  color: var(--accent-blue);
}

footer nav a:hover::after {
  width: 100%;
}

#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(79, 140, 255, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: all var(--transition-bounce);
  z-index: 999;
  line-height: 1.1;
  text-align: center;
  padding: 4px;
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 8px 32px rgba(79, 140, 255, 0.6);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(79, 140, 255, 0.4);
  }
  50% {
    box-shadow: 0 0 0 12px rgba(79, 140, 255, 0);
  }
}

@media (max-width: 1024px) {
  .main-nav > nav ul li a {
    padding: 6px 10px;
    font-size: 0.8rem;
  }

  .main-nav form[role="search"] input {
    width: 100px;
  }

  .main-nav form[role="search"] input:focus {
    width: 140px;
  }

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

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

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .top-bar {
    padding: 6px 16px;
    font-size: 0.72rem;
  }

  .top-bar p {
    font-size: 0.72rem;
  }

  .top-bar nav {
    gap: 10px;
  }

  .main-nav {
    padding: 10px 16px;
    flex-wrap: wrap;
    gap: 12px;
  }

  .brand svg {
    width: 40px;
    height: 40px;
  }

  .brand strong {
    font-size: 1rem;
  }

  .brand span {
    font-size: 0.65rem;
  }

  .main-nav > nav {
    order: 10;
    width: 100%;
    display: none;
  }

  .main-nav > nav.open {
    display: flex;
    animation: fadeIn 0.3s ease-out;
  }

  .main-nav > nav ul {
    flex-direction: column;
    width: 100%;
    gap: 2px;
  }

  .main-nav > nav ul li a {
    padding: 10px 14px;
    font-size: 0.88rem;
    border-radius: var(--radius-sm);
  }

  .main-nav form[role="search"] {
    order: 5;
    flex: 1;
    min-width: 160px;
  }

  .main-nav form[role="search"] input {
    width: 100%;
    flex: 1;
  }

  .main-nav form[role="search"] input:focus {
    width: 100%;
  }

  #menu-toggle {
    display: block;
    order: 6;
  }

  #theme-toggle {
    order: 4;
  }

  main {
    padding: 0 16px 40px;
  }

  section {
    margin-bottom: 48px;
    scroll-margin-top: 80px;
  }

  section h2 {
    font-size: 1.4rem;
  }

  section h3 {
    font-size: 1.1rem;
  }

  #hero {
    padding: 48px 0 40px;
  }

  #hero h1 {
    font-size: 1.4rem;
  }

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

  .hero-actions a {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

  .hero-carousel {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .hero-carousel article {
    padding: 22px 20px;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stats dd {
    font-size: 1.4rem;
  }

  #products ul,
  #solutions ul,
  #howto ul {
    grid-template-columns: 1fr;
  }

  #contact ul {
    grid-template-columns: 1fr;
  }

  #sitemap ul {
    grid-template-columns: repeat(2, 1fr);
  }

  #links ul {
    flex-direction: column;
  }

  #links ul li {
    width: 100%;
    text-align: center;
  }

  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 0.65rem;
  }

  #articles article,
  #news article {
    padding: 20px 18px;
  }

  #faq details summary {
    padding: 14px 18px;
    font-size: 0.88rem;
  }

  #faq details p {
    padding: 0 18px 16px;
    font-size: 0.84rem;
  }

  #howto ol li {
    padding: 16px 18px 16px 50px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .top-bar {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }

  .top-bar nav {
    justify-content: center;
  }

  .brand span {
    display: none;
  }

  .main-nav form[role="search"] {
    min-width: 0;
    order: 7;
    width: 100%;
  }

  .main-nav form[role="search"] input {
    width: 100%;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .stats > div {
    padding: 16px 10px;
  }

  .stats dt {
    font-size: 0.72rem;
  }

  .stats dd {
    font-size: 1.2rem;
  }

  #sitemap ul {
    grid-template-columns: 1fr;
  }

  section h2 {
    font-size: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  #site-header,
  #back-to-top,
  .top-bar nav,
  #theme-toggle,
  #menu-toggle,
  .main-nav form[role="search"] {
    display: none;
  }

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

  body::before,
  body::after {
    display: none;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}