:root {
  --primary: #FF6B35;
  --primary-dark: #E85A2A;
  --primary-light: #FF8F5E;
  --secondary: #4A90D9;
  --secondary-dark: #3A7BC8;
  --accent: #2ECC71;
  --accent-dark: #27AE60;
  --bg: #FFF8F5;
  --bg-alt: #FFFFFF;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.25);
  --text: #2D2A26;
  --text-secondary: #6B6560;
  --text-light: #9B9590;
  --border: rgba(0, 0, 0, 0.08);
  --border-light: rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 4px 24px rgba(255, 107, 53, 0.25);
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 68px;
}

[data-theme="dark"] {
  --bg: #1A1816;
  --bg-alt: #242220;
  --bg-card: rgba(36, 34, 32, 0.78);
  --bg-glass: rgba(36, 34, 32, 0.35);
  --text: #F0EDE8;
  --text-secondary: #B0AAA4;
  --text-light: #7A7570;
  --border: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.04);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 4px 24px rgba(255, 107, 53, 0.15);
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
  list-style: none;
}

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

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

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

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

::-webkit-scrollbar-track {
  background: transparent;
}

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

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

#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition), box-shadow var(--transition);
}

#site-header.scrolled {
  box-shadow: var(--shadow);
  background: var(--bg-card);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo svg {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.logo:hover svg {
  transform: rotate(-6deg) scale(1.08);
  box-shadow: 0 6px 32px rgba(255, 107, 53, 0.4);
}

.logo span {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav[aria-label="主导航"] ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

nav[aria-label="主导航"] a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
  white-space: nowrap;
}

nav[aria-label="主导航"] a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  transition: width var(--transition);
}

nav[aria-label="主导航"] a:hover {
  color: var(--primary);
  background: rgba(255, 107, 53, 0.08);
}

nav[aria-label="主导航"] a:hover::after {
  width: 60%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.header-actions button {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-glass);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition);
  white-space: nowrap;
}

.header-actions button:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(255, 107, 53, 0.08);
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

#mobile-menu-btn {
  display: none;
}

#search-bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
  animation: slideDown 0.3s ease;
}

#search-bar[hidden] {
  display: none;
}

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

#search-bar form {
  display: flex;
  gap: 12px;
  align-items: center;
}

#search-bar label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

#search-bar input[type="search"] {
  flex: 1;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition);
}

#search-bar input[type="search"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.12);
}

#search-bar input[type="search"]::placeholder {
  color: var(--text-light);
}

#search-bar button[type="submit"] {
  padding: 12px 28px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition);
  box-shadow: var(--shadow-glow);
}

#search-bar button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(255, 107, 53, 0.4);
}

nav[aria-label="面包屑导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px 0;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-light);
}

nav[aria-label="面包屑导航"] li + li::before {
  content: '/';
  margin-right: 8px;
  color: var(--text-light);
  opacity: 0.5;
}

nav[aria-label="面包屑导航"] a {
  color: var(--text-secondary);
}

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

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

section {
  margin-top: 64px;
  animation: fadeInUp 0.7s ease both;
}

section:nth-child(odd) {
  animation-delay: 0.05s;
}

section:nth-child(even) {
  animation-delay: 0.1s;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.3); }
  50% { box-shadow: 0 0 0 12px rgba(255, 107, 53, 0); }
}

h1, h2, h3, h4 {
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradientShift 6s ease infinite;
}

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

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 16px;
}

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

section:hover > h2::after {
  width: 120px;
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  margin-bottom: 12px;
  margin-top: 32px;
  color: var(--text);
}

h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--text);
}

p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

section > p:last-child {
  margin-bottom: 0;
}

#hero {
  margin-top: 32px;
  text-align: center;
  padding: 48px 0 0;
}

#hero > p {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1rem;
  line-height: 1.9;
}

#banner-carousel {
  margin-top: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
  background: var(--bg-alt);
}

#banner-carousel .slide {
  display: none;
  animation: scaleIn 0.5s ease;
}

#banner-carousel .slide:first-child {
  display: block;
}

#banner-carousel .slide svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0;
}

#banner-carousel::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.15);
}

#stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.stat-item {
  padding: 28px 20px;
  border-radius: var(--radius);
  background: var(--bg-card);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--accent));
  border-radius: var(--radius) var(--radius) 0 0;
  opacity: 0;
  transition: opacity var(--transition);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 107, 53, 0.2);
}

.stat-item:hover::before {
  opacity: 1;
}

.stat-number {
  display: block;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: 6px;
  animation: countUp 0.8s ease both;
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
}

#brand-intro,
#products,
#advantages,
#solutions,
#industry-app,
#cases,
#testimonials,
#news,
#tech-articles,
#industry-knowledge,
#howto,
#faq,
#contact,
#sitemap,
#friend-links,
#legal,
#update-info {
  padding: 40px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}

#brand-intro:hover,
#products:hover,
#advantages:hover,
#solutions:hover,
#industry-app:hover,
#cases:hover,
#testimonials:hover,
#news:hover,
#tech-articles:hover,
#industry-knowledge:hover,
#howto:hover,
#faq:hover,
#contact:hover {
  box-shadow: var(--shadow);
  border-color: rgba(255, 107, 53, 0.12);
}

#products h3,
#advantages h3,
#solutions h3,
#industry-app h3,
#cases h3 {
  padding: 16px 20px;
  margin-left: -20px;
  margin-right: -20px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.06), rgba(74, 144, 217, 0.06));
  border-left: 4px solid var(--primary);
  transition: all var(--transition);
}

#products h3:hover,
#advantages h3:hover,
#solutions h3:hover,
#industry-app h3:hover,
#cases h3:hover {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(74, 144, 217, 0.12));
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

#testimonials blockquote {
  position: relative;
  padding: 28px 32px 28px 48px;
  margin-bottom: 20px;
  border-radius: var(--radius);
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

#testimonials blockquote::before {
  content: '"';
  position: absolute;
  top: 8px;
  left: 16px;
  font-size: 3.5rem;
  line-height: 1;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.25;
  font-family: Georgia, serif;
}

#testimonials blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(255, 107, 53, 0.2);
}

#testimonials blockquote p {
  font-style: italic;
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

#testimonials cite {
  display: block;
  font-style: normal;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  text-align: right;
}

#news article,
#tech-articles article,
#industry-knowledge article {
  padding: 24px 28px;
  margin-bottom: 16px;
  border-radius: var(--radius);
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

#news article::before,
#tech-articles article::before,
#industry-knowledge article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--primary-light));
  border-radius: var(--radius) 0 0 var(--radius);
  opacity: 0;
  transition: opacity var(--transition);
}

#news article:hover,
#tech-articles article:hover,
#industry-knowledge article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
  border-color: rgba(255, 107, 53, 0.15);
}

#news article:hover::before,
#tech-articles article:hover::before,
#industry-knowledge article:hover::before {
  opacity: 1;
}

#news article h3,
#tech-articles article h3,
#industry-knowledge article h3 {
  margin-top: 0;
  margin-bottom: 8px;
  padding: 0;
  background: none;
  border: none;
  font-size: 1.1rem;
}

#news article h3 a,
#tech-articles article h3 a,
#industry-knowledge article h3 a {
  color: var(--text);
  transition: color var(--transition);
}

#news article h3 a:hover,
#tech-articles article h3 a:hover,
#industry-knowledge article h3 a:hover {
  color: var(--primary);
}

#news time,
#tech-articles time,
#industry-knowledge time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 12px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 107, 53, 0.08);
  font-weight: 500;
}

#news article > a:last-child,
#tech-articles article > a:last-child,
#industry-knowledge article > a:last-child {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 8px;
  transition: all var(--transition);
}

#news article > a:last-child::after,
#tech-articles article > a:last-child::after,
#industry-knowledge article > a:last-child::after {
  content: '→';
  transition: transform var(--transition);
}

#news article > a:last-child:hover::after,
#tech-articles article > a:last-child:hover::after,
#industry-knowledge article > a:last-child:hover::after {
  transform: translateX(4px);
}

#howto ol {
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#howto ol > li {
  counter-increment: step;
  padding: 24px 28px 24px 72px;
  border-radius: var(--radius);
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: all var(--transition);
}

#howto ol > li::before {
  content: counter(step);
  position: absolute;
  left: 20px;
  top: 24px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

#howto ol > li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(255, 107, 53, 0.2);
}

#howto ol > li h4 {
  margin-top: 0;
  color: var(--primary);
}

#howto ol > li p {
  margin-bottom: 0;
}

#faq details {
  margin-bottom: 12px;
  border-radius: var(--radius);
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition);
}

#faq details:hover {
  border-color: rgba(255, 107, 53, 0.2);
  box-shadow: var(--shadow);
}

#faq details[open] {
  border-color: rgba(255, 107, 53, 0.25);
  box-shadow: var(--shadow);
}

#faq summary {
  padding: 20px 28px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: all var(--transition);
  user-select: none;
}

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

#faq summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--primary);
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.08);
  transition: all var(--transition);
}

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

#faq summary:hover {
  color: var(--primary);
  background: rgba(255, 107, 53, 0.04);
}

#faq details > p {
  padding: 0 28px 24px;
  margin: 0;
  animation: slideDown 0.3s ease;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  margin-top: 0;
}

#contact h3 {
  margin-top: 28px;
}

#contact p {
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: baseline;
  gap: 8px;
}

#contact p:last-child {
  border-bottom: none;
}

#sitemap ul,
#friend-links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}

#sitemap li a,
#friend-links li a {
  display: block;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

#sitemap li a::before,
#friend-links li a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transform: scaleY(0);
  transition: transform var(--transition);
}

#sitemap li a:hover,
#friend-links li a:hover {
  color: var(--primary);
  border-color: rgba(255, 107, 53, 0.2);
  background: rgba(255, 107, 53, 0.04);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

#sitemap li a:hover::before,
#friend-links li a:hover::before {
  transform: scaleY(1);
}

#legal h2 {
  font-size: 1.2rem;
  margin-top: 32px;
  margin-bottom: 16px;
}

#legal h2:first-child {
  margin-top: 0;
}

#legal h2::after {
  width: 40px;
  height: 3px;
}

#update-info p {
  padding: 6px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-light);
}

#update-info p:last-child {
  border-bottom: none;
}

footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border-light);
  padding: 48px 24px 32px;
  margin-top: 80px;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-content p {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 8px;
  line-height: 1.7;
}

.footer-links {
  max-width: var(--max-width);
  margin: 24px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}

.footer-links a {
  color: var(--text-secondary);
  margin: 0 4px;
  transition: color var(--transition);
}

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

#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  transition: all var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  overflow: hidden;
}

#back-to-top::before {
  content: '↑';
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1;
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 8px 36px rgba(255, 107, 53, 0.5);
}

#back-to-top:active {
  transform: translateY(-2px) scale(1.02);
}

@media (max-width: 1024px) {
  nav[aria-label="主导航"] ul {
    gap: 2px;
  }

  nav[aria-label="主导航"] a {
    padding: 6px 10px;
    font-size: 0.82rem;
  }

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

  #brand-intro,
  #products,
  #advantages,
  #solutions,
  #industry-app,
  #cases,
  #testimonials,
  #news,
  #tech-articles,
  #industry-knowledge,
  #howto,
  #faq,
  #contact,
  #sitemap,
  #friend-links,
  #legal,
  #update-info {
    padding: 32px 28px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

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

  nav[aria-label="主导航"] {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-card);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    padding: 16px;
    animation: slideDown 0.3s ease;
  }

  nav[aria-label="主导航"].open {
    display: block;
  }

  nav[aria-label="主导航"] ul {
    flex-direction: column;
    gap: 4px;
  }

  nav[aria-label="主导航"] a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
  }

  #mobile-menu-btn {
    display: block;
  }

  #theme-toggle {
    display: none;
  }

  .header-actions button {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  main {
    padding: 0 16px 60px;
  }

  section {
    margin-top: 40px;
  }

  #hero {
    padding: 24px 0 0;
  }

  #banner-carousel {
    border-radius: var(--radius);
  }

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

  .stat-item {
    padding: 20px 12px;
  }

  #brand-intro,
  #products,
  #advantages,
  #solutions,
  #industry-app,
  #cases,
  #testimonials,
  #news,
  #tech-articles,
  #industry-knowledge,
  #howto,
  #faq,
  #contact,
  #sitemap,
  #friend-links,
  #legal,
  #update-info {
    padding: 24px 20px;
    border-radius: var(--radius);
  }

  h2 {
    font-size: 1.3rem;
  }

  #testimonials blockquote {
    padding: 20px 20px 20px 40px;
  }

  #testimonials blockquote::before {
    font-size: 2.5rem;
    left: 12px;
  }

  #news article,
  #tech-articles article,
  #industry-knowledge article {
    padding: 20px;
  }

  #howto ol > li {
    padding: 20px 20px 20px 60px;
  }

  #howto ol > li::before {
    left: 16px;
    top: 20px;
    width: 30px;
    height: 30px;
    font-size: 0.85rem;
  }

  #faq summary {
    padding: 16px 20px;
    font-size: 0.9rem;
  }

  #faq details > p {
    padding: 16px 20px 20px;
  }

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

  #sitemap li a,
  #friend-links li a {
    padding: 10px 14px;
    font-size: 0.82rem;
  }

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

  #back-to-top::before {
    font-size: 1.1rem;
  }

  footer {
    padding: 32px 16px 24px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

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

  .stat-item {
    padding: 16px 8px;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .stat-label {
    font-size: 0.75rem;
  }

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

  #search-bar form {
    flex-direction: column;
  }

  #search-bar input[type="search"],
  #search-bar button[type="submit"] {
    width: 100%;
  }

  .header-actions button {
    padding: 6px 10px;
    font-size: 0.75rem;
  }
}

@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,
  footer,
  #search-bar,
  .header-actions {
    display: none !important;
  }

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

  section {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
}