:root {
  --color-bg: #0a0e27;
  --color-bg-alt: #111633;
  --color-surface: #16213e;
  --color-surface-2: #1d2b4f;
  --color-primary: #e63946;
  --color-primary-hover: #ff4d5e;
  --color-secondary: #457b9d;
  --color-accent: #f1faee;
  --color-text: #e8ecf5;
  --color-text-muted: #9aa7c7;
  --color-border: rgba(241, 250, 238, 0.1);
  --color-glass: rgba(22, 33, 62, 0.55);
  --color-glass-border: rgba(241, 250, 238, 0.12);
  --gradient-banner: linear-gradient(135deg, #0a0e27 0%, #1d3557 40%, #e63946 100%);
  --gradient-accent: linear-gradient(135deg, #e63946 0%, #457b9d 100%);
  --gradient-card: linear-gradient(145deg, rgba(29, 53, 87, 0.8), rgba(10, 14, 39, 0.9));
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --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(230, 57, 70, 0.35);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", Consolas, monospace;
  --max-width: 1240px;
  --header-height: 72px;
}

body.light-mode {
  --color-bg: #f4f6fb;
  --color-bg-alt: #ffffff;
  --color-surface: #ffffff;
  --color-surface-2: #eef1f8;
  --color-text: #1a1f36;
  --color-text-muted: #5a6478;
  --color-border: rgba(10, 14, 39, 0.1);
  --color-glass: rgba(255, 255, 255, 0.65);
  --color-glass-border: rgba(10, 14, 39, 0.08);
  --gradient-banner: linear-gradient(135deg, #e8edf7 0%, #d4dff0 40%, #e63946 130%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(238, 241, 248, 0.9));
  --shadow-sm: 0 2px 8px rgba(10, 14, 39, 0.08);
  --shadow-md: 0 8px 24px rgba(10, 14, 39, 0.1);
  --shadow-lg: 0 16px 48px rgba(10, 14, 39, 0.14);
  --shadow-glow: 0 0 24px rgba(230, 57, 70, 0.2);
  --color-accent: #0a0e27;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

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

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(230, 57, 70, 0.12), transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(69, 123, 157, 0.12), transparent 45%);
  pointer-events: none;
  z-index: -1;
}

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

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

a:hover,
a:focus-visible {
  color: var(--color-primary-hover);
}

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

ul,
ol {
  list-style: none;
}

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

input,
button {
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.4rem); }
h4 { font-size: clamp(1rem, 1.8vw, 1.15rem); }

p {
  margin-bottom: 0.9em;
  color: var(--color-text);
}

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

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-surface-2);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-bg-alt);
}

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

#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: var(--color-glass);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--color-glass-border);
  transition: background var(--transition-base), box-shadow 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: var(--header-height);
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--color-text);
  font-weight: 800;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.04);
  color: var(--color-text);
}

.logo svg {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 0 8px rgba(230, 57, 70, 0.5));
  transition: filter var(--transition-base);
}

.logo:hover svg {
  filter: drop-shadow(0 0 16px rgba(230, 57, 70, 0.85));
}

.logo-text {
  font-size: 1.2rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

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

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

#main-nav a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  white-space: nowrap;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

#main-nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

#main-nav a:hover,
#main-nav a:focus-visible {
  color: var(--color-text);
  background: rgba(230, 57, 70, 0.1);
}

#main-nav a:hover::after {
  width: 60%;
}

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

.search-form {
  display: flex;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-form:focus-within {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.search-form input {
  background: transparent;
  border: none;
  color: var(--color-text);
  padding: 8px 14px;
  width: 180px;
  outline: none;
  font-size: 0.88rem;
}

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

.search-form button {
  padding: 8px 16px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  transition: opacity var(--transition-fast);
}

.search-form button:hover {
  opacity: 0.88;
}

#theme-toggle,
#menu-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

#theme-toggle:hover,
#menu-toggle:hover {
  transform: translateY(-2px) rotate(8deg);
  border-color: var(--color-primary);
  background: var(--color-surface-2);
}

#menu-toggle {
  display: none;
}

.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px 0;
}

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

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

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

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

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

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

main > section {
  margin: 56px 0;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

main > section > h2 {
  margin-bottom: 28px;
  position: relative;
  padding-left: 20px;
  background: linear-gradient(120deg, var(--color-text) 30%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

main > section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 70%;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  box-shadow: var(--shadow-glow);
}

#hero {
  margin-top: 24px;
}

.banner-slider {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 420px;
  background: var(--gradient-banner);
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

.banner-slider::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(10, 14, 39, 0.7) 100%);
  pointer-events: none;
  z-index: 1;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transform: scale(1.05);
  transition: opacity var(--transition-slow), transform var(--transition-slow), visibility var(--transition-slow);
  z-index: 0;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
  z-index: 2;
  position: relative;
}

.slide > svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.slide-content {
  position: relative;
  z-index: 3;
  padding: clamp(28px, 5vw, 64px);
  max-width: 720px;
  animation: slideUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.slide.active .slide-content {
  animation: slideUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(36px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-content h1,
.slide-content h2 {
  color: #fff;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
  -webkit-text-fill-color: #fff;
  background: none;
  padding-left: 0;
}

.slide-content h1::before,
.slide-content h2::before {
  display: none;
}

.slide-content p {
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  margin-bottom: 24px;
  max-width: 600px;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  background: var(--gradient-accent);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 24px rgba(230, 57, 70, 0.45);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cta-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transition: left var(--transition-slow);
}

.cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(230, 57, 70, 0.6);
  color: #fff;
}

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

.slider-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}

.slider-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.4);
  transition: width var(--transition-base), background var(--transition-base);
}

.slider-dots .dot.active {
  width: 32px;
  background: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.slider-dots .dot:hover {
  background: rgba(255, 255, 255, 0.75);
}

#stats {
  margin-top: 40px;
}

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

.stat-item {
  background: var(--gradient-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.stat-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(230, 57, 70, 0.35);
}

.stat-item:hover::before {
  transform: scaleX(1);
}

.stat-number {
  display: block;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

#brand article,
#products article,
#solutions article,
#applications article,
#cases article,
#howto article,
#knowledge article,
#notes article,
#extended article {
  background: var(--gradient-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 40px);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#brand article:hover,
#products article:hover,
#solutions article:hover,
#applications article:hover,
#cases article:hover,
#howto article:hover,
#knowledge article:hover,
#notes article:hover,
#extended article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(230, 57, 70, 0.25);
}

#brand h3,
#products h3,
#solutions h3,
#applications h3,
#cases h3,
#howto h3,
#knowledge h3,
#notes h3,
#extended h3 {
  color: var(--color-text);
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

#brand h3:first-child,
#products h3:first-child,
#solutions h3:first-child,
#applications h3:first-child,
#cases h3:first-child,
#howto h3:first-child,
#knowledge h3:first-child,
#notes h3:first-child,
#extended h3:first-child {
  margin-top: 0;
}

#brand h3::after,
#products h3::after,
#solutions h3::after,
#applications h3::after,
#cases h3::after,
#howto h3::after,
#knowledge h3::after,
#notes h3::after,
#extended h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 48px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
}

#brand h4,
#products h4,
#solutions h4,
#howto h4,
#knowledge h4,
#extended h4 {
  color: var(--color-primary);
  margin: 18px 0 8px;
  font-weight: 700;
}

#brand p,
#products p,
#solutions p,
#applications p,
#cases p,
#howto p,
#knowledge p,
#notes p,
#extended p {
  color: var(--color-text-muted);
  text-align: justify;
}

#brand p strong,
#products p strong {
  color: var(--color-text);
}

#testimonials .testimonial-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

#testimonials blockquote {
  background: var(--gradient-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-glass-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#testimonials blockquote::before {
  content: "\201C";
  position: absolute;
  top: 8px;
  right: 20px;
  font-size: 4rem;
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.18;
  font-family: Georgia, serif;
}

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

#testimonials blockquote p {
  color: var(--color-text);
  font-style: italic;
  margin-bottom: 16px;
}

#testimonials blockquote footer {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  font-weight: 600;
}

#news article {
  background: var(--gradient-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#news article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

#news article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(230, 57, 70, 0.3);
}

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

#news h3 {
  color: var(--color-text);
  margin-bottom: 6px;
}

#news time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 10px;
  padding: 2px 10px;
  background: rgba(230, 57, 70, 0.12);
  border-radius: var(--radius-full);
}

.article-card {
  background: var(--gradient-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  padding: 26px 28px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.article-card::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.08) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(230, 57, 70, 0.35);
}

.article-card:hover::after {
  opacity: 1;
}

.article-card h3 {
  margin-bottom: 8px;
}

.article-card h3 a {
  color: var(--color-text);
  background-image: linear-gradient(var(--color-primary), var(--color-primary));
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size var(--transition-base), color var(--transition-fast);
}

.article-card h3 a:hover {
  color: var(--color-primary);
  background-size: 100% 2px;
}

.article-card time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.article-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 14px;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.read-more:hover {
  gap: 10px;
  color: var(--color-primary-hover);
}

#faq details {
  background: var(--gradient-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

#faq details[open] {
  border-color: rgba(230, 57, 70, 0.4);
  box-shadow: var(--shadow-sm);
}

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

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

#faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: rgba(230, 57, 70, 0.15);
  color: var(--color-primary);
  font-size: 1.2rem;
  font-weight: 700;
  transition: transform var(--transition-base), background var(--transition-base);
}

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

#faq summary:hover {
  background: rgba(230, 57, 70, 0.08);
  color: var(--color-primary);
}

#faq details p {
  padding: 0 24px 22px;
  color: var(--color-text-muted);
  animation: fadeIn 0.4s ease both;
}

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

#sitemap nav ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

#sitemap nav a,
#links a {
  display: block;
  padding: 12px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

#sitemap nav a:hover,
#links a:hover {
  transform: translateY(-3px);
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

#contact address {
  font-style: normal;
  background: var(--gradient-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 40px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px 28px;
}

#contact address p {
  margin: 0;
  color: var(--color-text-muted);
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
  transition: color var(--transition-fast);
}

#contact address p:hover {
  color: var(--color-text);
}

#contact address strong {
  color: var(--color-primary);
  margin-right: 6px;
}

footer[role="contentinfo"] {
  margin-top: 72px;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

footer[role="contentinfo"]::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

.footer-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 40px;
}

.footer-brand h3 {
  font-size: 1.5rem;
  margin-bottom: 14px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  max-width: 360px;
}

.footer-links h4 {
  color: var(--color-text);
  font-size: 1rem;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

.footer-links h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  display: inline-block;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.footer-links a:hover {
  transform: translateX(6px);
  color: var(--color-primary);
}

footer section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 24px;
  border-top: 1px solid var(--color-border);
}

footer section h3 {
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 10px;
}

footer section p {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
}

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

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin-bottom: 6px;
  line-height: 1.6;
}

#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  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-base), transform var(--transition-base), visibility var(--transition-base), box-shadow 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(1.08);
  box-shadow: var(--shadow-glow), var(--shadow-md);
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

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

@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 (max-width: 1024px) {
  .header-inner {
    gap: 12px;
  }

  #main-nav a {
    padding: 8px 10px;
    font-size: 0.85rem;
  }

  .search-form input {
    width: 130px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

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

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

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

  #menu-toggle {
    display: flex;
  }

  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-glass);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border-bottom: 1px solid var(--color-glass-border);
    padding: 16px;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    box-shadow: var(--shadow-md);
  }

  #main-nav.open {
    max-height: 480px;
    opacity: 1;
    visibility: visible;
    overflow-y: auto;
  }

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

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

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

  .search-form {
    display: none;
  }

  main {
    padding: 0 16px;
  }

  main > section {
    margin: 40px 0;
  }

  .banner-slider {
    min-height: 380px;
    border-radius: var(--radius-md);
  }

  .slide-content {
    padding: 24px;
  }

  .slide-content h1,
  .slide-content h2 {
    font-size: 1.5rem;
  }

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

  .stat-item {
    padding: 20px 14px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 16px 28px;
  }

  .footer-links ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px 16px;
  }

  footer section {
    padding: 18px 16px;
  }

  .footer-bottom {
    padding: 20px 16px;
  }

  #back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }

  #contact address {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  #sitemap nav ul,
  #links ul {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 10px;
  }
}

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

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

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

  .banner-slider {
    min-height: 420px;
  }

  .slide-content h1,
  .slide-content h2 {
    font-size: 1.3rem;
  }

  .cta-btn {
    padding: 11px 24px;
    font-size: 0.92rem;
  }

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

  .stat-number {
    font-size: 1.6rem;
  }

  .stat-label {
    font-size: 0.8rem;
  }

  #brand article,
  #products article,
  #solutions article,
  #applications article,
  #cases article,
  #howto article,
  #knowledge article,
  #notes article,
  #extended article {
    padding: 20px;
    border-radius: var(--radius-md);
  }

  #testimonials blockquote {
    padding: 22px 20px;
  }

  .article-card {
    padding: 20px;
  }

  #faq summary {
    padding: 15px 18px;
    font-size: 0.92rem;
  }

  #faq details p {
    padding: 0 18px 18px;
  }

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

@media print {
  #site-header,
  #back-to-top,
  #menu-toggle,
  #theme-toggle,
  .search-form,
  .banner-slider,
  .slider-dots {
    display: none !important;
  }

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

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