:root {
  --primary: #6C5CE7;
  --primary-light: #A29BFE;
  --primary-dark: #4834D4;
  --accent: #FDCB6E;
  --accent-warm: #E17055;
  --accent-green: #00B894;
  --bg: #F8F9FD;
  --bg-card: #FFFFFF;
  --bg-elevated: #FFFFFF;
  --text: #2D3436;
  --text-secondary: #636E72;
  --text-muted: #B2BEC3;
  --border: rgba(108, 92, 231, 0.12);
  --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
  --shadow-md: 0 8px 30px rgba(108, 92, 231, 0.12);
  --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.16);
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-blur: 20px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --header-height: 68px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s 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;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  --max-width: 1200px;
  --gradient-hero: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 50%, #FDCB6E 100%);
  --gradient-card: linear-gradient(135deg, rgba(108, 92, 231, 0.06) 0%, rgba(162, 155, 254, 0.03) 100%);
  --gradient-accent: linear-gradient(135deg, #E17055 0%, #FDCB6E 100%);
  --gradient-green: linear-gradient(135deg, #00B894 0%, #55EFC4 100%);
}

[data-theme="dark"] {
  --primary: #A29BFE;
  --primary-light: #6C5CE7;
  --primary-dark: #8B7CF6;
  --accent: #FDCB6E;
  --bg: #0F0E17;
  --bg-card: #1A1928;
  --bg-elevated: #232135;
  --text: #EAEAF0;
  --text-secondary: #A7A5B8;
  --text-muted: #5C5A72;
  --border: rgba(162, 155, 254, 0.12);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --glass-bg: rgba(26, 25, 40, 0.78);
  --glass-border: rgba(162, 155, 254, 0.15);
  --gradient-card: linear-gradient(135deg, rgba(162, 155, 254, 0.08) 0%, rgba(108, 92, 231, 0.04) 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -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-smooth), color var(--transition-smooth);
}

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);
}

ul, ol {
  list-style: none;
}

.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;
}

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

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

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

::-webkit-scrollbar-thumb {
  background: var(--primary-light);
  border-radius: 10px;
}

::-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(--glass-bg);
  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-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

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

.logo svg {
  flex-shrink: 0;
  border-radius: 50%;
  transition: transform var(--transition-bounce);
}

.logo a:hover svg {
  transform: rotate(20deg) scale(1.08);
}

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

#main-nav ul {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
}

#main-nav a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast);
}

#main-nav a:hover {
  color: var(--primary);
  background: rgba(108, 92, 231, 0.08);
}

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

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

#site-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

#search-input {
  width: 160px;
  padding: 8px 14px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: width var(--transition-smooth);
}

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

#search-input:focus {
  width: 220px;
}

#site-search button {
  padding: 8px 16px;
  border: none;
  background: var(--primary);
  color: #fff;
  font-size: 0.85rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast);
  white-space: nowrap;
}

#site-search button:hover {
  background: var(--primary-dark);
}

#dark-toggle,
#menu-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-card);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-bounce), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  flex-shrink: 0;
}

#dark-toggle:hover,
#menu-toggle:hover {
  transform: scale(1.1) rotate(10deg);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

#menu-toggle {
  display: none;
}

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

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

section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
  position: relative;
  display: inline-block;
  color: var(--text);
}

section h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 60px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-hero);
  transition: width var(--transition-smooth);
}

section:hover h2::after {
  width: 100%;
}

section h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  margin-top: 28px;
  color: var(--text);
  letter-spacing: -0.01em;
}

section h3:first-child {
  margin-top: 0;
}

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

section ul,
section ol {
  color: var(--text-secondary);
  margin-bottom: 16px;
  padding-left: 0;
}

section ul li,
section ol li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 8px;
  line-height: 1.8;
}

section ul li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-light);
}

section ol {
  counter-reset: item;
}

section ol li {
  counter-increment: item;
}

section ol li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

section article {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth), border-color var(--transition-smooth);
}

section article:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 92, 231, 0.2);
}

#hero {
  max-width: 100%;
  padding: 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 140%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(108, 92, 231, 0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(253, 203, 110, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

#hero > * {
  position: relative;
  z-index: 1;
}

#hero-title {
  font-size: clamp(1.6rem, 4.5vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.3;
  max-width: 900px;
  margin: 0 auto 20px;
  padding: 0 24px;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: heroFadeIn 0.8s ease-out both;
}

#hero > p {
  max-width: 780px;
  margin: 0 auto 40px;
  padding: 0 24px;
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.9;
  animation: heroFadeIn 0.8s ease-out 0.15s both;
}

#hero > p strong {
  color: var(--primary);
  font-weight: 700;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(162, 155, 254, 0.08));
  padding: 2px 6px;
  border-radius: 6px;
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-banner {
  position: relative;
  max-width: 900px;
  margin: 0 auto 48px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: heroFadeIn 0.8s ease-out 0.3s both;
}

.banner-slide {
  display: none;
  position: relative;
}

.banner-slide.active {
  display: block;
  animation: bannerSlideIn 0.6s ease-out both;
}

@keyframes bannerSlideIn {
  from {
    opacity: 0;
    transform: scale(1.03);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.banner-slide svg {
  width: 100%;
  height: auto;
  display: block;
}

.banner-controls {
  position: absolute;
  bottom: 16px;
  right: 16px;
  display: flex;
  gap: 8px;
  z-index: 2;
}

.banner-controls button {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #fff;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-bounce), background var(--transition-fast);
}

.banner-controls button:hover {
  background: rgba(255, 255, 255, 0.4);
  transform: scale(1.12);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 60px;
  animation: heroFadeIn 0.8s ease-out 0.45s both;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 24px 12px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-bounce), box-shadow var(--transition-smooth);
}

.stat:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.stat-num {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat span:last-child {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

#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);
}

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

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

#anchor-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 24px;
  position: sticky;
  top: var(--header-height);
  z-index: 100;
  background: var(--glass-bg);
  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: box-shadow var(--transition-smooth);
}

#anchor-nav ul {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-bottom: 4px;
}

#anchor-nav ul::-webkit-scrollbar {
  display: none;
}

#anchor-nav a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 50px;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

#anchor-nav a:hover {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
}

#brand article,
#history article,
#culture article,
#products article,
#advantages article,
#solutions article,
#applications article,
#cases article,
#reviews article,
#knowledge article,
#howto article,
#contact article,
#legal article {
  background: var(--gradient-card), var(--bg-card);
}

#reviews blockquote {
  position: relative;
  padding: 24px 28px;
  margin: 16px 0;
  background: var(--bg-elevated);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

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

#reviews blockquote p {
  font-style: italic;
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 10px;
}

#reviews blockquote footer {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

#news article h3 a,
#articles article h3 a {
  color: var(--text);
  font-weight: 700;
  transition: color var(--transition-fast);
}

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

#news time,
#articles time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

#news article > p:last-child a,
#articles article > p:last-child a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

#news article > p:last-child a:hover,
#articles article > p:last-child a:hover {
  gap: 8px;
  color: var(--primary-dark);
}

#news article > p:last-child a::after,
#articles article > p:last-child a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

#news article > p:last-child a:hover::after,
#articles article > p:last-child a:hover::after {
  transform: translateX(3px);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: rgba(108, 92, 231, 0.25);
}

.faq-item h3 {
  margin: 0;
}

.faq-item h3 button {
  width: 100%;
  padding: 20px 24px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.faq-item h3 button::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform var(--transition-smooth), color var(--transition-fast);
  line-height: 1;
}

.faq-item h3 button[aria-expanded="true"]::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-item h3 button:hover {
  background: rgba(108, 92, 231, 0.04);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth), padding var(--transition-smooth), opacity var(--transition-smooth);
  opacity: 0;
}

.faq-item h3 button[aria-expanded="true"] + .faq-answer {
  max-height: 600px;
  opacity: 1;
}

.faq-answer p {
  padding: 0 24px 20px;
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

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

#sitemap nav a,
#links a {
  display: block;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

#sitemap nav a:hover,
#links a:hover {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(108, 92, 231, 0.3);
}

#footer-info ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

#footer-info li {
  font-size: 0.85rem;
  color: var(--text-muted);
}

#footer-info li::before {
  display: none;
}

#site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-hero);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand svg {
  border-radius: 50%;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 400px;
  line-height: 1.7;
  margin: 0;
}

#site-footer nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

#site-footer nav a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

#site-footer nav a:hover {
  color: var(--primary);
}

.footer-inner > p {
  grid-column: 1 / -1;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  margin: 0;
}

#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: var(--gradient-hero);
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: opacity var(--transition-smooth), visibility var(--transition-smooth), transform var(--transition-bounce), box-shadow var(--transition-fast);
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: var(--shadow-lg);
}

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

.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);
}

.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) {
  #main-nav ul {
    gap: 0;
  }

  #main-nav a {
    padding: 8px 8px;
    font-size: 0.8rem;
  }

  #search-input {
    width: 120px;
  }

  #search-input:focus {
    width: 160px;
  }
}

@media (max-width: 900px) {
  :root {
    --header-height: 60px;
  }

  .header-inner {
    padding: 0 16px;
    gap: 12px;
  }

  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--glass-bg);
    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;
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-smooth), opacity var(--transition-smooth), visibility var(--transition-smooth);
    justify-content: flex-start;
    box-shadow: var(--shadow-md);
  }

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

  #main-nav ul {
    flex-direction: column;
    width: 100%;
    gap: 4px;
  }

  #main-nav a {
    display: block;
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
  }

  #menu-toggle {
    display: flex;
  }

  #site-search {
    display: none;
  }

  section {
    padding: 40px 16px;
  }

  section article {
    padding: 24px 20px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    padding: 0 16px 40px;
  }

  .stat {
    padding: 18px 10px;
  }

  #anchor-nav {
    padding: 12px 16px;
  }

  #breadcrumb {
    padding: 16px 16px 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    padding: 32px 16px 24px;
    gap: 24px;
  }

  #site-footer nav ul {
    gap: 8px 16px;
  }

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

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

  .logo a {
    font-size: 1.05rem;
  }

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

  #hero-title {
    font-size: 1.45rem;
  }

  #hero > p {
    font-size: 0.92rem;
  }

  .hero-banner {
    border-radius: var(--radius-lg);
  }

  .banner-controls button {
    width: 34px;
    height: 34px;
    font-size: 1.2rem;
  }

  .hero-stats {
    gap: 10px;
  }

  .stat {
    padding: 14px 8px;
  }

  .stat-num {
    font-size: 1.4rem;
  }

  .stat span:last-child {
    font-size: 0.72rem;
  }

  section h2 {
    font-size: 1.3rem;
    margin-bottom: 24px;
  }

  section h3 {
    font-size: 1.05rem;
  }

  section article {
    padding: 20px 16px;
    border-radius: var(--radius-md);
  }

  .faq-item h3 button {
    padding: 16px 18px;
    font-size: 0.92rem;
  }

  .faq-answer p {
    padding: 0 18px 16px;
    font-size: 0.88rem;
  }

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

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

  #back-to-top {
    bottom: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
}

@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  #site-header,
  #anchor-nav,
  #back-to-top,
  #site-footer,
  .banner-controls {
    display: none;
  }

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

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

  section article {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}