:root {
  --primary: #ff6f9c;
  --primary-dark: #e8557f;
  --primary-light: #ffb3cd;
  --primary-soft: #ffe3ee;
  --secondary: #6fa8ff;
  --secondary-soft: #e3f0ff;
  --accent: #ffb347;
  --accent-soft: #fff0d9;
  --bg: #fff8fb;
  --bg-alt: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --text: #3a2a33;
  --text-secondary: #7a5f6d;
  --text-muted: #a88d9a;
  --border: rgba(255, 111, 156, 0.18);
  --shadow-sm: 0 2px 8px rgba(255, 111, 156, 0.08);
  --shadow-md: 0 8px 24px rgba(255, 111, 156, 0.12);
  --shadow-lg: 0 16px 48px rgba(255, 111, 156, 0.16);
  --shadow-glow: 0 0 24px rgba(255, 111, 156, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --gradient-primary: linear-gradient(135deg, #ff6f9c 0%, #ffb3cd 50%, #ffd6e8 100%);
  --gradient-banner: linear-gradient(135deg, #ff6f9c 0%, #c86dd7 50%, #6fa8ff 100%);
  --gradient-soft: linear-gradient(135deg, #fff8fb 0%, #ffe3ee 50%, #e3f0ff 100%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(255, 227, 238, 0.6));
  --gradient-text: linear-gradient(135deg, #ff6f9c, #c86dd7, #6fa8ff);
  --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-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --primary: #ff85ab;
  --primary-dark: #ff6f9c;
  --primary-light: #ffb3cd;
  --primary-soft: #3d1f2e;
  --secondary: #8bb8ff;
  --secondary-soft: #1a2540;
  --accent: #ffc266;
  --accent-soft: #3d2e18;
  --bg: #1a1218;
  --bg-alt: #241a22;
  --bg-card: rgba(45, 32, 42, 0.78);
  --bg-glass: rgba(45, 32, 42, 0.55);
  --text: #f5e8ee;
  --text-secondary: #d4b8c6;
  --text-muted: #9a7a8a;
  --border: rgba(255, 133, 171, 0.22);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 24px rgba(255, 133, 171, 0.35);
  --gradient-primary: linear-gradient(135deg, #ff85ab 0%, #c86dd7 50%, #8bb8ff 100%);
  --gradient-banner: linear-gradient(135deg, #8a3d5c 0%, #5a2d6e 50%, #2d3d6e 100%);
  --gradient-soft: linear-gradient(135deg, #1a1218 0%, #2d1f2a 50%, #1a2540 100%);
  --gradient-card: linear-gradient(145deg, rgba(45, 32, 42, 0.9), rgba(61, 31, 46, 0.6));
  --gradient-text: linear-gradient(135deg, #ff85ab, #c86dd7, #8bb8ff);
}

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

html {
  scroll-behavior: smooth;
  -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: var(--bg);
  background-image:
    radial-gradient(circle at 10% 10%, rgba(255, 111, 156, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 20%, rgba(111, 168, 255, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 50% 90%, rgba(200, 109, 215, 0.06) 0%, transparent 40%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  -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-fast), opacity var(--transition-fast);
}

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

a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  transition: all var(--transition-fast);
}

button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#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);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

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

.brand:hover {
  transform: scale(1.05);
  color: var(--primary);
}

.brand svg {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 2px 6px rgba(255, 111, 156, 0.35));
  transition: transform var(--transition-bounce), filter var(--transition-smooth);
}

.brand:hover svg {
  transform: rotate(-8deg) scale(1.1);
  filter: drop-shadow(0 4px 12px rgba(255, 111, 156, 0.5));
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

#site-header nav {
  flex: 1;
  min-width: 0;
}

#site-header nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: center;
}

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

#site-header nav a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: transform var(--transition-smooth);
}

#site-header nav a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

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

#site-header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  padding: 3px;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
  flex-shrink: 0;
}

#site-header form[role="search"]:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 111, 156, 0.15);
}

#search-input {
  border: none;
  background: transparent;
  padding: 8px 16px;
  font-size: 0.88rem;
  width: 180px;
  outline: none;
  color: var(--text);
}

#search-input::placeholder {
  color: var(--text-muted);
}

#site-header form[role="search"] button {
  padding: 8px 18px;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 999px;
  white-space: nowrap;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#site-header form[role="search"] button:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}

#theme-toggle,
#menu-toggle {
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  white-space: nowrap;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

#theme-toggle:hover,
#menu-toggle:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

#menu-toggle {
  display: none;
}

main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 60px;
}

main > section,
main > nav {
  margin-bottom: 48px;
  animation: fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) both;
}

main > section:nth-child(1) { animation-delay: 0.05s; }
main > section:nth-child(2) { animation-delay: 0.1s; }
main > section:nth-child(3) { animation-delay: 0.15s; }
main > section:nth-child(4) { animation-delay: 0.2s; }
main > section:nth-child(5) { animation-delay: 0.25s; }
main > section:nth-child(6) { animation-delay: 0.3s; }

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

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

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

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

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

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 111, 156, 0.3); }
  50% { box-shadow: 0 0 0 12px rgba(255, 111, 156, 0); }
}

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

#banner {
  position: relative;
  padding: 48px 40px;
  border-radius: var(--radius-xl);
  background: var(--gradient-banner);
  background-size: 200% 200%;
  animation: gradientShift 12s ease infinite;
  color: #fff;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-top: 32px;
}

#banner::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#banner::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#banner h1 {
  position: relative;
  z-index: 1;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
  letter-spacing: 0.5px;
}

#banner > p {
  position: relative;
  z-index: 1;
  font-size: clamp(0.92rem, 1.6vw, 1.05rem);
  line-height: 1.85;
  max-width: 860px;
  margin-bottom: 32px;
  opacity: 0.95;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.1);
}

.carousel {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 36px;
}

.slide {
  background: var(--bg-card);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-bounce), box-shadow var(--transition-smooth);
  overflow: hidden;
  animation: scaleIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.slide:nth-child(1) { animation-delay: 0.15s; }
.slide:nth-child(2) { animation-delay: 0.25s; }
.slide:nth-child(3) { animation-delay: 0.35s; }

.slide:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.slide svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  transition: transform var(--transition-smooth);
}

.slide:hover svg {
  transform: scale(1.03);
}

.slide h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}

.slide p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-lg);
}

.stats li {
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.5;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.stats li:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-3px);
}

.stats strong {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  letter-spacing: 0.5px;
}

nav[aria-label="面包屑导航"] {
  padding: 12px 20px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

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

nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--text-muted);
  font-weight: 700;
}

nav[aria-label="面包屑导航"] a {
  color: var(--primary);
  font-weight: 500;
}

nav[aria-label="面包屑导航"] a:hover {
  text-decoration: underline;
}

nav[aria-label="面包屑导航"] [aria-current="page"] {
  color: var(--text-muted);
  font-weight: 500;
}

#intro,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links {
  padding: 40px 36px;
  background: var(--bg-card);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth), background var(--transition-smooth);
}

#intro:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#news:hover,
#articles:hover,
#faq:hover,
#howto:hover,
#contact:hover,
#sitemap:hover,
#links:hover {
  box-shadow: var(--shadow-lg);
}

main > section > h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  font-weight: 800;
  margin-bottom: 28px;
  padding-bottom: 16px;
  position: relative;
  letter-spacing: 0.5px;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

main > section > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 72px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 4px;
  transition: width var(--transition-smooth);
}

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

main > section > h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 700;
  color: var(--primary-dark);
  margin: 28px 0 12px;
  padding-left: 16px;
  position: relative;
  letter-spacing: 0.3px;
}

main > section > h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 70%;
  background: var(--gradient-primary);
  border-radius: 3px;
}

main > section > h3:first-of-type {
  margin-top: 0;
}

main > section > h4 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text);
  margin: 20px 0 8px;
  padding-left: 12px;
  position: relative;
}

main > section > h4::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 0.7rem;
  top: 50%;
  transform: translateY(-50%);
}

main > section p {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--text-secondary);
  margin-bottom: 14px;
  text-align: justify;
}

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

#cases blockquote {
  position: relative;
  margin: 18px 0;
  padding: 20px 24px 20px 56px;
  background: var(--gradient-card);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

#cases blockquote::before {
  content: """;
  position: absolute;
  left: 16px;
  top: 8px;
  font-size: 3rem;
  line-height: 1;
  color: var(--primary-light);
  font-family: Georgia, serif;
  opacity: 0.7;
}

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

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

#news h3,
#articles h3 {
  margin-top: 20px;
}

#articles article {
  padding: 20px 24px;
  margin-bottom: 16px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-fast);
}

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

#articles article h3 {
  margin-top: 0;
  font-size: 1.08rem;
}

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

#articles article p {
  font-size: 0.88rem;
  margin-bottom: 12px;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  padding: 6px 16px;
  background: var(--primary-soft);
  border-radius: 999px;
  transition: all var(--transition-fast);
}

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

#articles article a:hover {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

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

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

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

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

#faq summary {
  padding: 16px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform var(--transition-smooth), color var(--transition-fast);
  line-height: 1;
}

#faq details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
  color: var(--primary-dark);
}

#faq summary:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

#faq details p {
  padding: 0 20px 18px;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--text-secondary);
  animation: fadeIn 0.3s ease both;
}

#howto ol {
  counter-reset: howto;
  padding-left: 0;
}

#howto ol li {
  counter-increment: howto;
  position: relative;
  padding: 14px 18px 14px 58px;
  margin-bottom: 10px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

#howto ol li::before {
  content: counter(howto);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

#contact p {
  font-size: 0.92rem;
  margin-bottom: 8px;
  padding-left: 8px;
}

#contact p:has(+ p) {
  border-bottom: 1px dashed var(--border);
  padding-bottom: 8px;
}

#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}

#sitemap li,
#links li {
  transition: transform var(--transition-fast);
}

#sitemap a,
#links a {
  display: block;
  padding: 12px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

#sitemap a::before,
#links a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition-smooth);
}

#sitemap a:hover,
#links a:hover {
  color: var(--primary);
  border-color: var(--primary-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

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

footer {
  background: var(--gradient-soft);
  border-top: 1px solid var(--border);
  padding: 48px 24px 32px;
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  background-size: 200% 100%;
  animation: gradientShift 6s ease infinite;
}

footer > section {
  max-width: 1280px;
  margin: 0 auto 32px;
  padding: 32px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

footer > section > h2 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 20px;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

footer > section > h3 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 20px 0 8px;
  padding-left: 14px;
  position: relative;
}

footer > section > h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  background: var(--gradient-primary);
  border-radius: 2px;
}

footer > section > h3:first-of-type {
  margin-top: 0;
}

footer > section > p {
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

footer > p {
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 6px 0;
  line-height: 1.8;
}

#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  line-height: 1.2;
  box-shadow: var(--shadow-md), var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: all var(--transition-bounce);
  animation: pulseGlow 3s ease infinite;
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: var(--shadow-lg), 0 0 32px rgba(255, 111, 156, 0.5);
}

#back-to-top:active {
  transform: translateY(-2px) scale(1.05);
}

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

@media (max-width: 1024px) {
  .header-inner {
    gap: 14px;
  }

  #site-header nav a {
    padding: 7px 10px;
    font-size: 0.85rem;
  }

  #search-input {
    width: 140px;
  }

  #banner {
    padding: 36px 28px;
  }

  main {
    padding: 0 18px 48px;
  }

  #intro,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links {
    padding: 32px 26px;
  }
}

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

  .header-inner {
    padding: 10px 16px;
    gap: 10px;
  }

  .brand-name {
    font-size: 1.15rem;
  }

  .brand svg {
    width: 34px;
    height: 34px;
  }

  #site-header nav {
    order: 4;
    flex-basis: 100%;
    display: none;
  }

  #site-header nav.open {
    display: block;
    animation: fadeInUp 0.3s ease both;
  }

  #site-header nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 0;
  }

  #site-header nav a {
    padding: 10px 14px;
    text-align: center;
    border-radius: var(--radius-sm);
  }

  #site-header nav a::after {
    display: none;
  }

  #site-header form[role="search"] {
    order: 5;
    flex-basis: 100%;
    display: none;
  }

  #site-header form[role="search"].open {
    display: flex;
    animation: fadeInUp 0.3s ease both;
  }

  #search-input {
    flex: 1;
    width: auto;
  }

  #menu-toggle {
    display: block;
    margin-left: auto;
  }

  #theme-toggle {
    padding: 8px 12px;
    font-size: 0.78rem;
  }

  #banner {
    padding: 28px 20px;
    border-radius: var(--radius-lg);
    margin-top: 20px;
  }

  #banner h1 {
    font-size: 1.5rem;
  }

  #banner > p {
    font-size: 0.88rem;
    margin-bottom: 24px;
  }

  .carousel {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .slide {
    padding: 14px;
  }

  .slide h2 {
    font-size: 1.05rem;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
    padding: 18px;
    gap: 12px;
  }

  .stats strong {
    font-size: 1.3rem;
  }

  main {
    padding: 0 14px 40px;
  }

  main > section,
  main > nav {
    margin-bottom: 32px;
  }

  #intro,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links {
    padding: 24px 18px;
    border-radius: var(--radius-lg);
  }

  main > section > h2 {
    font-size: 1.3rem;
    margin-bottom: 22px;
    padding-bottom: 12px;
  }

  main > section > h3 {
    font-size: 1.08rem;
    margin: 22px 0 10px;
  }

  main > section p {
    font-size: 0.9rem;
    line-height: 1.85;
  }

  #cases blockquote {
    padding: 16px 18px 16px 48px;
  }

  #cases blockquote::before {
    font-size: 2.4rem;
    left: 12px;
  }

  #articles article {
    padding: 16px 18px;
  }

  #faq summary {
    padding: 14px 16px;
    padding-right: 42px;
    font-size: 0.9rem;
  }

  #faq details p {
    padding: 0 16px 14px;
    font-size: 0.86rem;
  }

  #howto ol li {
    padding: 12px 14px 12px 50px;
    font-size: 0.88rem;
  }

  #howto ol li::before {
    left: 12px;
    width: 26px;
    height: 26px;
    font-size: 0.78rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
  }

  #sitemap a,
  #links a {
    padding: 10px 12px;
    font-size: 0.85rem;
  }

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

  footer > section {
    padding: 22px 18px;
    border-radius: var(--radius-lg);
  }

  footer > section > h2 {
    font-size: 1.15rem;
  }

  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 46px;
    height: 46px;
    font-size: 0.65rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 8px 12px;
  }

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

  .brand svg {
    width: 30px;
    height: 30px;
  }

  #theme-toggle {
    padding: 7px 10px;
    font-size: 0.72rem;
  }

  #menu-toggle {
    padding: 7px 12px;
    font-size: 0.78rem;
  }

  #banner {
    padding: 22px 16px;
  }

  #banner h1 {
    font-size: 1.3rem;
  }

  #banner > p {
    font-size: 0.84rem;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
    padding: 14px;
    gap: 10px;
  }

  .stats li {
    font-size: 0.78rem;
  }

  .stats strong {
    font-size: 1.15rem;
  }

  main {
    padding: 0 10px 32px;
  }

  #intro,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links {
    padding: 20px 14px;
  }

  main > section > h2 {
    font-size: 1.18rem;
  }

  main > section > h3 {
    font-size: 1rem;
    padding-left: 12px;
  }

  main > section p {
    font-size: 0.86rem;
  }

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

@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,
  #theme-toggle,
  #menu-toggle {
    display: none;
  }

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

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