:root {
  --primary: #e94560;
  --primary-dark: #c73650;
  --primary-light: #ff6b81;
  --secondary: #0f3460;
  --secondary-light: #1a4a7a;
  --accent: #533483;
  --accent-light: #7b52b9;
  --bg: #f8f9fc;
  --bg-card: #ffffff;
  --bg-header: rgba(255, 255, 255, 0.85);
  --bg-footer: #1a1a2e;
  --text: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8888a0;
  --text-inverse: #ffffff;
  --border: #e8e8f0;
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.1);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.15);
  --shadow-glow: 0 8px 32px rgba(233, 69, 96, 0.3);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --glass-bg: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.25);
  --glass-blur: 20px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}

[data-theme="dark"] {
  --bg: #0d0d1a;
  --bg-card: #1a1a2e;
  --bg-header: rgba(26, 26, 46, 0.85);
  --bg-footer: #0a0a14;
  --text: #eeeef5;
  --text-secondary: #b0b0c8;
  --text-muted: #707088;
  --border: #2a2a45;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 8px 32px rgba(233, 69, 96, 0.4);
  --glass-bg: rgba(26, 26, 46, 0.4);
  --glass-border: rgba(255, 255, 255, 0.1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

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

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

ul,
ol {
  list-style: none;
}

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

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

::selection {
  background-color: var(--primary);
  color: #fff;
}

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

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

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

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

#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--bg-header);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.03);
}

.logo svg {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 2px 8px rgba(233, 69, 96, 0.4));
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
  white-space: nowrap;
}

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

#main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

#main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

#main-nav a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: transform var(--transition-base);
}

#main-nav a:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.08);
}

#main-nav a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

#site-search {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50px;
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

#site-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
  background: var(--bg-card);
}

#site-search input {
  width: 180px;
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text);
  outline: none;
  font-size: 0.875rem;
}

#site-search input::placeholder {
  color: var(--text-muted);
  font-size: 0.8rem;
}

#site-search button {
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

#site-search button:hover {
  opacity: 0.9;
  transform: scale(1.02);
}

#dark-mode-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1.1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

#dark-mode-toggle:hover {
  background: rgba(233, 69, 96, 0.1);
  border-color: var(--primary);
  transform: rotate(20deg) scale(1.1);
}

#mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1.2rem;
  background: var(--bg);
  border: 1px solid var(--border);
  transition: background var(--transition-fast);
}

#mobile-menu-toggle:hover {
  background: rgba(233, 69, 96, 0.1);
}

main {
  padding-top: var(--header-height);
}

#breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 24px 0;
}

#breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

#breadcrumb li + li::before {
  content: '/';
  margin-right: 8px;
  color: var(--text-muted);
  opacity: 0.5;
}

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

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

#breadcrumb [aria-current="page"] {
  color: var(--primary);
  font-weight: 600;
}

#hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
}

#hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
  animation: heroGlow 8s ease-in-out infinite alternate;
}

#hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(83, 52, 131, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
  animation: heroGlow 10s ease-in-out infinite alternate-reverse;
}

@keyframes heroGlow {
  0% { transform: scale(1) translate(0, 0); opacity: 0.8; }
  100% { transform: scale(1.2) translate(20px, -20px); opacity: 1; }
}

.hero-content {
  animation: fadeInUp 0.8s ease-out both;
}

.hero-content h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -1px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text) 0%, var(--primary) 50%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content > p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 32px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff !important;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 50px;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.6s ease;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(233, 69, 96, 0.45);
  color: #fff !important;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text) !important;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  border: 1px solid var(--glass-border);
  transition: transform var(--transition-base), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  background: rgba(233, 69, 96, 0.1);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  color: var(--primary) !important;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-item {
  text-align: center;
  padding: 16px 8px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.stat-number {
  display: block;
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

.hero-banner {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: fadeInRight 0.8s ease-out 0.2s both;
  aspect-ratio: 600 / 340;
}

.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.05);
  transition: opacity 0.8s ease, transform 0.8s ease;
  pointer-events: none;
}

.banner-slide.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

.banner-slide svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.banner-dots button {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.banner-dots button:hover {
  background: rgba(233, 69, 96, 0.6);
  transform: scale(1.15);
}

.banner-dots button[aria-selected="true"] {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(233, 69, 96, 0.6);
  transform: scale(1.2);
}

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

section h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 32px;
  position: relative;
  padding-bottom: 16px;
  color: var(--text);
}

section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 64px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent-light));
  border-radius: 4px;
}

section h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--text);
  line-height: 1.4;
}

section h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--primary);
}

section p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.85;
}

section ul,
section ol {
  margin: 16px 0;
  padding-left: 0;
}

section ul li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: var(--text-secondary);
  line-height: 1.8;
}

section ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: linear-gradient(135deg, var(--primary), var(--accent-light));
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(233, 69, 96, 0.4);
}

section ul li strong {
  color: var(--text);
  font-weight: 700;
}

#brand-intro,
#solutions,
#news,
#howto,
#sitemap,
#friend-links {
  background: var(--bg);
}

#products,
#cases,
#faq,
#contact {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  margin: 20px auto;
  max-width: calc(var(--max-width) + 48px);
  padding: 60px 48px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

#products h3:first-of-type,
#cases h3:first-of-type,
#faq details:first-of-type {
  margin-top: 0;
}

#products ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}

#products ul li {
  background: var(--bg);
  padding: 16px 20px 16px 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#products ul li::before {
  left: 20px;
}

#products ul li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

#cases blockquote {
  position: relative;
  margin: 20px 0;
  padding: 24px 28px 24px 56px;
  background: var(--bg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#cases blockquote::before {
  content: '"';
  position: absolute;
  top: 8px;
  left: 16px;
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.3;
  line-height: 1;
  font-family: Georgia, serif;
}

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

#cases blockquote p {
  margin: 0;
  font-style: italic;
  color: var(--text-secondary);
}

#news article {
  padding: 28px;
  margin-bottom: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

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

#news article h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

#news article h3 a {
  color: var(--text);
  transition: color var(--transition-fast);
}

#news article h3 a:hover {
  color: var(--primary);
}

#news article time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  padding: 2px 12px;
  background: var(--bg);
  border-radius: 50px;
  border: 1px solid var(--border);
}

#news article p {
  margin-bottom: 12px;
  font-size: 0.95rem;
}

#news article > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary);
  transition: gap var(--transition-fast);
}

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

#news article > a:hover {
  gap: 10px;
}

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

#faq details {
  margin-bottom: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

#faq details:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

#faq summary {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background var(--transition-fast), color var(--transition-fast);
  user-select: none;
}

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

#faq summary::after {
  content: '+';
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}

#faq details[open] summary {
  background: rgba(233, 69, 96, 0.06);
  color: var(--primary);
}

#faq details[open] summary::after {
  content: '−';
  transform: rotate(180deg);
  background: var(--primary);
  color: #fff;
}

#faq details > p {
  padding: 0 24px 20px;
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
  animation: fadeInUp 0.3s ease-out;
}

#howto h4 {
  display: flex;
  align-items: center;
  gap: 10px;
}

#howto h4::before {
  content: '';
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--primary), var(--accent-light));
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

#howto ul li strong {
  color: var(--primary);
}

#contact address {
  font-style: normal;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
  margin: 20px 0;
}

#contact address p {
  padding: 14px 18px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin: 0;
  font-size: 0.9rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

#contact address p:hover {
  transform: translateX(4px);
  border-color: var(--primary);
}

#contact address strong {
  color: var(--primary);
  font-weight: 600;
}

#contact ul li {
  padding: 12px 16px 12px 40px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 8px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

#contact ul li::before {
  left: 16px;
  top: 18px;
}

#contact ul li:hover {
  transform: translateX(4px);
  border-color: var(--primary);
}

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

#sitemap nav ul li {
  padding: 0;
}

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

#sitemap nav ul li a {
  display: block;
  padding: 12px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  transition: all var(--transition-base);
}

#sitemap nav ul li a:hover {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

#friend-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#friend-links ul li {
  padding: 0;
}

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

#friend-links ul li a {
  display: inline-block;
  padding: 8px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: all var(--transition-base);
}

#friend-links ul li a:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(233, 69, 96, 0.08);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#site-footer {
  background: var(--bg-footer);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 24px 0;
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent-light), var(--secondary-light), var(--primary));
  background-size: 200% 100%;
  animation: gradientShift 4s linear infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  padding: 0;
}

.footer-brand h2::after {
  display: none;
}

.footer-brand p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 6px;
  line-height: 1.7;
}

.footer-links h3,
.footer-contact h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

.footer-links h3::after,
.footer-contact h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
}

.footer-links ul li {
  padding: 0;
  margin-bottom: 8px;
}

.footer-links ul li::before {
  display: none;
}

.footer-links ul li a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  display: inline-block;
}

.footer-links ul li a:hover {
  color: var(--primary-light);
  padding-left: 6px;
}

.footer-contact address {
  font-style: normal;
}

.footer-contact address p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 8px;
  line-height: 1.7;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 6px;
  line-height: 1.7;
}

#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  border-radius: 50%;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: all var(--transition-base);
  z-index: 999;
}

#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 12px 40px rgba(233, 69, 96, 0.5);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

@media (max-width: 1024px) {
  #hero {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 32px 24px 48px;
  }

  .hero-content > p {
    max-width: 100%;
  }

  .hero-banner {
    max-width: 640px;
    margin: 0 auto;
    width: 100%;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 900px) {
  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-header);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    padding: 16px 24px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  #main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  #main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  #main-nav a {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  #main-nav a::after {
    display: none;
  }

  #mobile-menu-toggle {
    display: flex;
  }

  #site-search input {
    width: 120px;
  }

  #products,
  #cases,
  #faq,
  #contact {
    border-radius: var(--radius-lg);
    padding: 40px 28px;
    margin: 16px 12px;
  }

  section {
    padding: 40px 24px;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 64px;
  }

  .header-inner {
    padding: 0 16px;
    gap: 8px;
  }

  .logo-text {
    font-size: 1.1rem;
  }

  .logo svg {
    width: 32px;
    height: 32px;
  }

  #site-search {
    display: none;
  }

  .header-actions {
    gap: 6px;
  }

  #dark-mode-toggle,
  #mobile-menu-toggle {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  #hero {
    padding: 24px 16px 40px;
    gap: 28px;
  }

  .hero-content h1 {
    font-size: 1.5rem;
    letter-spacing: -0.5px;
  }

  .hero-content > p {
    font-size: 0.9rem;
    line-height: 1.8;
  }

  .hero-actions {
    gap: 12px;
    margin-bottom: 28px;
  }

  .btn-primary,
  .btn-secondary {
    padding: 12px 24px;
    font-size: 0.9rem;
    flex: 1;
    justify-content: center;
    min-width: 0;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .stat-item {
    padding: 12px 6px;
  }

  .stat-number {
    font-size: 1.2rem;
  }

  .stat-label {
    font-size: 0.7rem;
  }

  .banner-dots {
    bottom: 12px;
    gap: 8px;
  }

  .banner-dots button {
    width: 30px;
    height: 30px;
    font-size: 0.7rem;
  }

  section {
    padding: 32px 16px;
  }

  section h2 {
    font-size: 1.35rem;
    margin-bottom: 24px;
  }

  section h3 {
    font-size: 1.1rem;
    margin: 24px 0 12px;
  }

  section p {
    font-size: 0.9rem;
  }

  #products,
  #cases,
  #faq,
  #contact {
    border-radius: var(--radius-md);
    padding: 28px 18px;
    margin: 12px 8px;
  }

  #products ul {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  #products ul li {
    padding: 12px 16px 12px 38px;
    font-size: 0.88rem;
  }

  #products ul li::before {
    left: 16px;
    top: 16px;
  }

  #cases blockquote {
    padding: 18px 18px 18px 44px;
  }

  #cases blockquote::before {
    font-size: 2.2rem;
    left: 12px;
  }

  #news article {
    padding: 20px;
  }

  #news article h3 {
    font-size: 1rem;
  }

  #faq summary {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  #faq details > p {
    padding: 0 16px 16px;
    font-size: 0.88rem;
  }

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

  #sitemap nav ul {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  #sitemap nav ul li a {
    padding: 10px 12px;
    font-size: 0.82rem;
  }

  #friend-links ul {
    gap: 8px;
  }

  #friend-links ul li a {
    padding: 6px 14px;
    font-size: 0.8rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 28px;
  }

  #site-footer {
    padding: 40px 16px 0;
  }

  .footer-bottom {
    padding: 20px 0;
  }

  .footer-bottom p {
    font-size: 0.72rem;
  }

  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1.1rem;
  }
}

@media (max-width: 380px) {
  .logo-text {
    font-size: 1rem;
  }

  .hero-content h1 {
    font-size: 1.3rem;
  }

  .btn-primary,
  .btn-secondary {
    padding: 10px 18px;
    font-size: 0.85rem;
  }

  .stat-number {
    font-size: 1rem;
  }
}

@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,
  #mobile-menu-toggle,
  #dark-mode-toggle,
  #site-search,
  .hero-actions,
  .banner-dots {
    display: none !important;
  }

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

  section {
    padding: 20px 0;
    page-break-inside: avoid;
  }

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