:root {
  --brand: #c0392b;
  --brand-dark: #96281b;
  --brand-light: #e74c3c;
  --brand-glow: rgba(192, 57, 43, 0.35);
  --accent: #f39c12;
  --accent-2: #e67e22;
  --bg: #f5f6fa;
  --bg-alt: #ffffff;
  --bg-elevated: #ffffff;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #ffffff;
  --text: #1a1a2e;
  --text-soft: #4a4a68;
  --text-muted: #7a7a95;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.14);
  --shadow-sm: 0 2px 8px rgba(20, 20, 50, 0.06);
  --shadow-md: 0 8px 28px rgba(20, 20, 50, 0.10);
  --shadow-lg: 0 20px 50px rgba(20, 20, 50, 0.16);
  --shadow-brand: 0 10px 30px rgba(192, 57, 43, 0.28);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --header-h: 68px;
  --grad-brand: linear-gradient(135deg, #c0392b 0%, #e74c3c 45%, #f39c12 100%);
  --grad-hero: linear-gradient(135deg, #2c1810 0%, #5c1f14 35%, #c0392b 75%, #e67e22 100%);
  --grad-soft: linear-gradient(135deg, rgba(192, 57, 43, 0.10), rgba(243, 156, 18, 0.10));
  --glass-bg: rgba(255, 255, 255, 0.62);
  --glass-border: rgba(255, 255, 255, 0.55);
  --glass-blur: 18px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition: 0.35s var(--ease);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d16;
    --bg-alt: #14141f;
    --bg-elevated: #1a1a28;
    --surface: rgba(26, 26, 40, 0.72);
    --surface-solid: #1a1a28;
    --text: #f0f0f8;
    --text-soft: #c4c4d8;
    --text-muted: #8e8ea8;
    --border: rgba(255, 255, 255, 0.10);
    --border-strong: rgba(255, 255, 255, 0.18);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.60);
    --shadow-brand: 0 10px 30px rgba(192, 57, 43, 0.40);
    --glass-bg: rgba(26, 26, 40, 0.62);
    --glass-border: rgba(255, 255, 255, 0.12);
    --grad-hero: linear-gradient(135deg, #1a0a08 0%, #3d1410 35%, #8e2a1e 75%, #b85c1a 100%);
    --grad-soft: linear-gradient(135deg, rgba(192, 57, 43, 0.18), rgba(243, 156, 18, 0.12));
  }
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(192, 57, 43, 0.10), transparent 42%),
    radial-gradient(circle at 88% 22%, rgba(243, 156, 18, 0.09), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(192, 57, 43, 0.06), transparent 55%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
  list-style: none;
}

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

h1 { font-size: clamp(1.75rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2.4vw, 1.6rem); }
h4 { font-size: clamp(1.05rem, 2vw, 1.25rem); }

p { color: var(--text-soft); }

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

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand), var(--accent-2));
  border-radius: 10px;
  border: 2px solid var(--bg-alt);
}

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

:focus-visible {
  outline: 3px solid var(--brand-glow);
  outline-offset: 3px;
  border-radius: 6px;
}

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

#site-header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-brand);
  opacity: 0.85;
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.brand:hover {
  transform: scale(1.04);
}

.brand svg {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: var(--shadow-brand);
  transition: transform 0.5s var(--ease-spring), box-shadow var(--transition);
}

.brand:hover svg {
  transform: rotate(-6deg) scale(1.08);
  box-shadow: 0 14px 36px rgba(192, 57, 43, 0.45);
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
}

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

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

#site-header nav a {
  position: relative;
  display: inline-block;
  padding: 8px 12px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-soft);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

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

#site-header nav a:hover {
  color: var(--brand);
  background: var(--grad-soft);
  transform: translateY(-2px);
}

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

#site-search {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

#site-search:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-glow);
  transform: translateY(-1px);
}

#site-search input[type="search"] {
  border: none;
  outline: none;
  background: transparent;
  padding: 10px 16px;
  font-size: 0.9rem;
  color: var(--text);
  width: 200px;
  font-family: inherit;
  transition: width var(--transition);
}

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

#site-search input[type="search"]:focus {
  width: 240px;
}

#site-search button {
  border: none;
  cursor: pointer;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--grad-brand);
  transition: filter var(--transition), transform var(--transition);
}

#site-search button:hover {
  filter: brightness(1.1);
}

#site-search button:active {
  transform: scale(0.96);
}

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

main > section {
  margin: 64px 0;
  padding: 40px;
  background: var(--surface);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  animation: fadeUp 0.7s var(--ease) both;
}

main > section:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 var(--brand-glow); }
  50% { box-shadow: 0 0 0 12px rgba(192, 57, 43, 0); }
}

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

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

#hero {
  position: relative;
  margin-top: 40px;
  padding: 72px 48px;
  border-radius: var(--radius-xl);
  background: var(--grad-hero);
  background-size: 200% 200%;
  animation: gradientShift 14s ease infinite, fadeUp 0.7s var(--ease) both;
  overflow: hidden;
  color: #fff;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

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

#hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(243, 156, 18, 0.35), transparent 65%);
  animation: floatY 8s ease-in-out infinite;
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(231, 76, 60, 0.30), transparent 65%);
  animation: floatY 10s ease-in-out infinite reverse;
  pointer-events: none;
}

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

#hero h1 {
  color: #fff;
  margin-bottom: 20px;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  max-width: 900px;
}

#hero > p {
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  max-width: 820px;
  margin-bottom: 32px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #ffffff 0%, #ffe8d6 100%);
  color: var(--brand-dark);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.btn-primary:hover {
  color: var(--brand-dark);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.btn-secondary {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.26);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.30);
}

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

.hero-stats > div {
  padding: 20px 16px;
  text-align: center;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.22);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.hero-stats > div:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.45);
}

.hero-stats strong {
  display: block;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.30);
}

.hero-stats span {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.02em;
}

#banner-carousel {
  padding: 40px;
}

#banner-carousel h2 {
  margin-bottom: 28px;
  padding-left: 18px;
  position: relative;
}

#banner-carousel h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 70%;
  border-radius: 4px;
  background: var(--grad-brand);
}

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

.carousel figure {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  background: var(--bg-elevated);
}

.carousel figure:hover {
  transform: translateY(-8px) scale(1.015);
  box-shadow: var(--shadow-lg);
}

.carousel figure svg {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.7s var(--ease), filter var(--transition);
}

.carousel figure:hover svg {
  transform: scale(1.06);
  filter: brightness(1.08) saturate(1.15);
}

.carousel figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 40px 20px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.82), rgba(0, 0, 0, 0.35) 60%, transparent);
  transform: translateY(8px);
  opacity: 0.95;
  transition: transform var(--transition), opacity var(--transition);
}

.carousel figure:hover figcaption {
  transform: translateY(0);
  opacity: 1;
}

#breadcrumb {
  margin: 24px 0;
  padding: 14px 24px;
  background: var(--surface);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  animation: fadeIn 0.6s var(--ease) both;
}

#breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
}

#breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

#breadcrumb li:not(:last-child)::after {
  content: "›";
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1;
}

#breadcrumb a {
  color: var(--text-soft);
  font-weight: 500;
}

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

#about h2,
#products h2,
#solutions h2,
#cases h2,
#news h2,
#articles h2,
#faq h2,
#howto h2,
#contact h2,
#sitemap h2,
#links h2,
#privacy h2,
#disclaimer h2,
#copyright h2 {
  margin-bottom: 28px;
  padding-left: 18px;
  position: relative;
}

#about h2::before,
#products h2::before,
#solutions h2::before,
#cases h2::before,
#news h2::before,
#articles h2::before,
#faq h2::before,
#howto h2::before,
#contact h2::before,
#sitemap h2::before,
#links h2::before,
#privacy h2::before,
#disclaimer h2::before,
#copyright h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 70%;
  border-radius: 4px;
  background: var(--grad-brand);
}

#about h3,
#products h3,
#solutions h3,
#cases h3,
#news h3,
#articles h3,
#howto h3,
#contact h3 {
  margin: 32px 0 14px;
  color: var(--brand);
  position: relative;
  display: inline-block;
}

#about h3::after,
#products h3::after,
#solutions h3::after,
#cases h3::after,
#news h3::after,
#articles h3::after,
#howto h3::after,
#contact h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), transparent);
  opacity: 0.5;
}

#about h4,
#products h4 {
  margin: 22px 0 10px;
  color: var(--text);
  font-size: 1.08rem;
  padding-left: 14px;
  border-left: 3px solid var(--accent);
}

#about p,
#products p,
#solutions p,
#cases p,
#news p,
#articles p,
#howto p,
#contact p,
#privacy p,
#disclaimer p,
#copyright p {
  margin-bottom: 14px;
  text-align: justify;
}

#products ul,
#solutions ul,
#howto ul,
#sitemap ul,
#links ul {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

#products ul {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

#products ul li {
  position: relative;
  padding: 14px 18px 14px 44px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-soft);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#products ul li::before {
  content: "✓";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  border-radius: 50%;
  background: var(--grad-brand);
  box-shadow: 0 2px 8px var(--brand-glow);
}

#products ul li:hover {
  transform: translateX(6px);
  border-color: var(--brand);
  box-shadow: var(--shadow-md);
  background: var(--grad-soft);
}

#solutions ul li,
#howto ul li {
  position: relative;
  padding: 10px 16px 10px 38px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-soft);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

#solutions ul li::before,
#howto ul li::before {
  content: "▸";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--brand);
  font-size: 1rem;
  font-weight: 700;
}

#solutions ul li:hover,
#howto ul li:hover {
  transform: translateX(5px);
  border-color: var(--brand);
  background: var(--grad-soft);
}

#cases blockquote {
  position: relative;
  margin: 18px 0;
  padding: 22px 26px 22px 60px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-left: 4px solid var(--brand);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 6px;
  font-size: 3.4rem;
  line-height: 1;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--brand);
  opacity: 0.35;
}

#cases blockquote p {
  margin: 0;
  font-size: 1rem;
  color: var(--text-soft);
  font-style: italic;
  text-align: left;
}

#cases blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--accent);
}

#news article,
#articles article {
  position: relative;
  padding: 24px 26px;
  margin-bottom: 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

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

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

#news article:hover,
#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

#news article h3,
#articles article h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  color: var(--text);
  display: block;
}

#news article h3::after,
#articles article h3::after {
  display: none;
}

#news article time,
#articles article time {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--brand);
  background: var(--grad-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  letter-spacing: 0.02em;
}

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

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

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

#news article a:hover,
#articles article a:hover {
  gap: 10px;
  color: var(--brand-light);
}

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

#faq details {
  margin-bottom: 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

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

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

#faq summary {
  position: relative;
  padding: 18px 54px 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition), background var(--transition);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 400;
  color: #fff;
  border-radius: 50%;
  background: var(--grad-brand);
  box-shadow: 0 4px 12px var(--brand-glow);
  transition: transform var(--transition), background var(--transition);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
}

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

#faq details p {
  padding: 0 24px 20px;
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-soft);
  animation: fadeIn 0.4s var(--ease) both;
}

#howto ol {
  counter-reset: howto;
  display: grid;
  gap: 14px;
  margin: 20px 0;
  padding: 0;
}

#howto ol li {
  position: relative;
  counter-increment: howto;
  padding: 18px 22px 18px 68px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--text-soft);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#howto ol li::before {
  content: counter(howto);
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  border-radius: 50%;
  background: var(--grad-brand);
  box-shadow: 0 4px 14px var(--brand-glow);
}

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

#howto ol li strong {
  color: var(--brand);
  font-weight: 700;
}

#contact p {
  padding: 10px 16px;
  margin-bottom: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

#contact p:hover {
  transform: translateX(5px);
  border-color: var(--brand);
  background: var(--grad-soft);
}

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

#sitemap ul li a,
#links ul li a {
  display: block;
  padding: 12px 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-soft);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), color var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  transform: translateY(-4px);
  color: #fff;
  background: var(--grad-brand);
  border-color: transparent;
  box-shadow: var(--shadow-brand);
}

#privacy,
#disclaimer,
#copyright {
  font-size: 0.92rem;
}

#privacy p,
#disclaimer p,
#copyright p {
  color: var(--text-muted);
  line-height: 1.85;
}

#site-footer {
  position: relative;
  margin-top: 80px;
  padding: 56px 24px 40px;
  background: linear-gradient(180deg, rgba(192, 57, 43, 0.06), rgba(192, 57, 43, 0.02));
  border-top: 1px solid var(--border);
}

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

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  transition: transform var(--transition);
}

.footer-brand:hover {
  transform: scale(1.05);
}

.footer-brand svg {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  box-shadow: var(--shadow-brand);
}

.footer-brand span {
  font-size: 1.2rem;
  font-weight: 800;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.footer-inner p {
  margin: 6px 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-inner p:hover {
  color: var(--text-soft);
}

.footer-inner p:first-of-type {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 14px;
}

.footer-inner p:last-of-type {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
}

#back-to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 999;
  padding: 12px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--grad-brand);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: var(--shadow-brand);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.9);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), filter var(--transition);
  animation: pulseGlow 3s ease-in-out infinite;
}

#back-to-top:hover {
  filter: brightness(1.12);
  transform: translateY(-4px) scale(1.05);
}

#back-to-top:active {
  transform: translateY(-2px) scale(0.98);
}

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

@media (max-width: 1024px) {
  .header-inner {
    padding: 0 18px;
    gap: 16px;
  }

  #site-header nav a {
    padding: 8px 9px;
    font-size: 0.86rem;
  }

  #site-search input[type="search"] {
    width: 150px;
  }

  #site-search input[type="search"]:focus {
    width: 180px;
  }

  main {
    padding: 0 18px;
  }

  main > section {
    padding: 32px 26px;
    margin: 48px 0;
  }

  #hero {
    padding: 56px 32px;
  }

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

@media (max-width: 768px) {
  :root {
    --header-h: auto;
  }

  .header-inner {
    flex-direction: column;
    align-items: stretch;
    padding: 14px 16px;
    gap: 12px;
  }

  .brand {
    justify-content: center;
  }

  #site-header nav ul {
    justify-content: center;
    gap: 2px;
  }

  #site-header nav a {
    padding: 7px 10px;
    font-size: 0.84rem;
  }

  #site-search {
    width: 100%;
  }

  #site-search input[type="search"],
  #site-search input[type="search"]:focus {
    width: 100%;
    flex: 1;
  }

  main {
    padding: 0 14px;
  }

  main > section {
    padding: 26px 20px;
    margin: 36px 0;
    border-radius: var(--radius);
  }

  #hero {
    padding: 44px 22px;
    border-radius: var(--radius-lg);
    margin-top: 28px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    padding: 13px 24px;
  }

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

  .hero-stats > div {
    padding: 16px 12px;
  }

  .carousel {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  #breadcrumb {
    padding: 12px 18px;
    border-radius: var(--radius);
  }

  #breadcrumb ol {
    font-size: 0.82rem;
  }

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

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

  #news article,
  #articles article {
    padding: 20px 18px;
  }

  #faq summary {
    padding: 16px 50px 16px 18px;
    font-size: 0.95rem;
  }

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

  #howto ol li {
    padding: 16px 18px 16px 60px;
  }

  #howto ol li::before {
    left: 16px;
    width: 30px;
    height: 30px;
    font-size: 0.86rem;
  }

  #back-to-top {
    right: 16px;
    bottom: 16px;
    padding: 10px 16px;
    font-size: 0.8rem;
  }

  #site-footer {
    padding: 40px 18px 30px;
    margin-top: 56px;
  }
}

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

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

  #site-header nav a {
    padding: 6px 8px;
    font-size: 0.8rem;
  }

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

  #cases blockquote::before {
    font-size: 2.6rem;
    left: 14px;
  }
}

@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,
  #site-search,
  .hero-actions {
    display: none;
  }

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

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