:root {
  --bg-primary: #0d0d1a;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-card: rgba(26, 26, 46, 0.72);
  --bg-card-hover: rgba(30, 30, 55, 0.88);
  --bg-glass: rgba(22, 33, 62, 0.55);
  --bg-glass-border: rgba(233, 69, 96, 0.18);
  --text-primary: #f0f0f5;
  --text-secondary: #b8b8cc;
  --text-muted: #7878a0;
  --accent: #e94560;
  --accent-hover: #ff5a75;
  --accent-glow: rgba(233, 69, 96, 0.35);
  --gold: #f5c542;
  --gold-glow: rgba(245, 197, 66, 0.3);
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 30%, #0f3460 60%, #e94560 100%);
  --gradient-accent: linear-gradient(135deg, #e94560 0%, #f5c542 100%);
  --gradient-card: linear-gradient(145deg, rgba(26,26,46,0.9) 0%, rgba(22,33,62,0.7) 100%);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px var(--accent-glow);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --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;
  --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);
  --max-width: 1200px;
  --nav-height: 64px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #f5f5fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eef0f6;
    --bg-card: rgba(255, 255, 255, 0.78);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.6);
    --bg-glass-border: rgba(233, 69, 96, 0.15);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #8888a8;
    --accent: #d63050;
    --accent-hover: #e94560;
    --accent-glow: rgba(214, 48, 80, 0.2);
    --gold: #c49a1a;
    --gold-glow: rgba(196, 154, 26, 0.2);
    --gradient-hero: linear-gradient(135deg, #eef0f6 0%, #dce0f0 30%, #c8d0e8 60%, #e94560 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.95) 0%, rgba(238,240,246,0.8) 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 24px var(--accent-glow);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-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-primary);
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(233, 69, 96, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(15, 52, 96, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(245, 197, 66, 0.03) 0%, transparent 70%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

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

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

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

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 4px;
}

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

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

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

a:hover {
  color: var(--accent-hover);
}

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

ul,
ol {
  list-style: none;
}

/* ===== HEADER & NAV ===== */
header[role="banner"] {
  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(--bg-glass-border);
  transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
}

header[role="banner"]:hover {
  box-shadow: var(--shadow-md);
}

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

header nav > a:first-child {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
  flex-shrink: 0;
  transition: transform var(--transition-bounce), filter var(--transition-fast);
}

header nav > a:first-child:hover {
  transform: scale(1.05);
  filter: brightness(1.15);
}

header nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

header nav ul::-webkit-scrollbar {
  display: none;
}

header nav ul li a {
  display: inline-block;
  padding: 8px 14px;
  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), transform var(--transition-fast);
}

header nav ul li a:hover {
  color: var(--accent);
  background: rgba(233, 69, 96, 0.1);
  transform: translateY(-1px);
}

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

/* ===== HERO ===== */
#hero {
  position: relative;
  padding: 60px 0 40px;
  text-align: center;
  overflow: hidden;
}

#hero::before {
  content: "";
  position: absolute;
  inset: -40% -20%;
  background: var(--gradient-hero);
  opacity: 0.12;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  animation: heroPulse 8s ease-in-out infinite alternate;
}

@keyframes heroPulse {
  0% { transform: scale(1) rotate(0deg); opacity: 0.1; }
  100% { transform: scale(1.15) rotate(3deg); opacity: 0.18; }
}

#hero h1 {
  font-size: clamp(1.6rem, 5vw, 2.8rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: fadeInUp 0.8s ease-out both;
}

#hero > p {
  max-width: 780px;
  margin: 0 auto 16px;
  font-size: 1rem;
  color: var(--text-secondary);
  animation: fadeInUp 0.8s ease-out 0.15s both;
}

#hero > p:last-of-type {
  font-size: 0.9rem;
  color: var(--text-muted);
  animation-delay: 0.25s;
}

#hero figure {
  margin: 40px auto 0;
  max-width: 800px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
  animation: fadeInUp 0.8s ease-out 0.35s both;
}

#hero figure:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-lg), 0 0 40px var(--accent-glow);
}

#hero figure svg {
  width: 100%;
  height: auto;
  display: block;
}

#hero figcaption {
  padding: 14px 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  text-align: center;
}

/* ===== SECTIONS ===== */
main > section {
  margin-bottom: 56px;
  animation: fadeInUp 0.7s ease-out both;
  animation-timeline: view();
  animation-range: entry 0% entry 30%;
}

@supports not (animation-timeline: view()) {
  main > section {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

main > section > h2 {
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 28px;
  padding-bottom: 14px;
  position: relative;
  color: var(--text-primary);
}

main > section > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  border-radius: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition-smooth);
}

main > section:hover > h2::after {
  width: 100px;
}

main > section h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

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

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

main > section ul,
main > section ol {
  margin: 16px 0 20px;
  padding-left: 0;
}

main > section ul li,
main > section ol li {
  position: relative;
  padding: 10px 16px 10px 36px;
  margin-bottom: 8px;
  color: var(--text-secondary);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

main > section ul li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

main > section ol {
  counter-reset: ol-counter;
}

main > section ol li {
  counter-increment: ol-counter;
}

main > section ol li::before {
  content: counter(ol-counter);
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-glow);
}

main > section ul li:hover,
main > section ol li:hover {
  transform: translateX(6px);
  background: var(--bg-card-hover);
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

main > section ul li strong,
main > section ol li strong {
  color: var(--accent);
  font-weight: 700;
}

/* ===== BRAND SECTION ===== */
#brand {
  background: var(--gradient-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

#brand:hover {
  box-shadow: var(--shadow-lg), 0 0 30px var(--accent-glow);
  border-color: rgba(233, 69, 96, 0.3);
}

#brand h3 {
  color: var(--gold);
  font-size: 1.1rem;
  margin-top: 32px;
}

#brand h3:first-of-type {
  margin-top: 0;
}

/* ===== PRODUCTS ===== */
#products {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

#products > h2 {
  grid-column: 1 / -1;
}

#products h3 {
  font-size: 1.1rem;
  margin-top: 0;
  color: var(--accent);
}

#products p {
  font-size: 0.92rem;
}

/* Product cards via h3 + p grouping */
#products h3 ~ p:last-of-type {
  font-size: 0.85rem;
  color: var(--gold);
  font-weight: 600;
  padding: 10px 14px;
  background: rgba(245, 197, 66, 0.08);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--gold);
  margin-top: 12px;
}

/* ===== SOLUTIONS ===== */
#solutions {
  background: var(--gradient-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

#solutions:hover {
  box-shadow: var(--shadow-lg), 0 0 30px var(--accent-glow);
  border-color: rgba(233, 69, 96, 0.3);
}

#solutions h3 {
  color: var(--gold);
  margin-top: 28px;
}

#solutions h3:first-of-type {
  margin-top: 0;
}

/* ===== CASES ===== */
#cases blockquote {
  margin: 16px 0;
  padding: 18px 22px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  top: -8px;
  left: 14px;
  font-size: 3rem;
  color: var(--accent);
  opacity: 0.3;
  font-family: Georgia, serif;
  line-height: 1;
}

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

#cases blockquote p {
  font-style: italic;
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.95rem;
}

/* ===== NEWS ===== */
#news article {
  padding: 22px 24px;
  margin-bottom: 16px;
  background: var(--gradient-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

#news article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 24px var(--accent-glow);
  border-color: rgba(233, 69, 96, 0.35);
}

#news article h3 {
  margin-top: 0;
  font-size: 1.08rem;
  color: var(--accent);
  transition: color var(--transition-fast);
}

#news article:hover h3 {
  color: var(--accent-hover);
}

#news article p:first-of-type {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

/* ===== ARTICLES ===== */
#articles article {
  padding: 20px 24px;
  margin-bottom: 14px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

#articles article:hover {
  transform: translateY(-3px) scale(1.005);
  box-shadow: var(--shadow-md), 0 0 20px var(--accent-glow);
  border-color: rgba(233, 69, 96, 0.3);
}

#articles article h3 {
  margin-top: 0;
  font-size: 1.02rem;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

#articles article:hover h3 {
  color: var(--accent);
}

#articles article p:first-of-type {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

#articles article p {
  font-size: 0.92rem;
  margin-bottom: 10px;
}

#articles article a {
  display: inline-block;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 6px 16px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

#articles article a:hover {
  background: var(--accent);
  color: #fff;
  transform: translateX(4px);
  box-shadow: 0 0 16px var(--accent-glow);
}

/* ===== ARTICLE DETAIL SECTIONS ===== */
main > section[id^="article-"] {
  padding: 28px 32px;
  background: var(--gradient-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

main > section[id^="article-"]:hover {
  box-shadow: var(--shadow-md), 0 0 20px var(--accent-glow);
  border-color: rgba(233, 69, 96, 0.25);
}

main > section[id^="article-"] > h2 {
  font-size: 1.3rem;
  margin-bottom: 20px;
}

/* ===== FAQ ===== */
#faq details {
  margin-bottom: 12px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth), transform var(--transition-fast);
}

#faq details:hover {
  border-color: rgba(233, 69, 96, 0.3);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  border-color: var(--accent);
  box-shadow: var(--shadow-md), 0 0 20px var(--accent-glow);
}

#faq details summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

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

#faq details summary::after {
  content: "+";
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--accent);
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(233, 69, 96, 0.1);
  transition: transform var(--transition-smooth), background var(--transition-fast), color var(--transition-fast);
}

#faq details[open] summary::after {
  content: "\2212";
  transform: rotate(180deg);
  background: var(--accent);
  color: #fff;
}

#faq details summary:hover {
  color: var(--accent);
  background: rgba(233, 69, 96, 0.05);
}

#faq details p {
  padding: 0 20px 18px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid var(--bg-glass-border);
  padding-top: 14px;
  margin: 0 20px 0;
  padding-left: 0;
  padding-right: 0;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== HOWTO ===== */
#howto {
  background: var(--gradient-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

#howto:hover {
  box-shadow: var(--shadow-lg), 0 0 30px var(--accent-glow);
  border-color: rgba(233, 69, 96, 0.25);
}

#howto h3 {
  color: var(--gold);
  margin-top: 28px;
}

#howto h3:first-of-type {
  margin-top: 0;
}

#howto ol li {
  background: rgba(233, 69, 96, 0.05);
  border-color: rgba(233, 69, 96, 0.15);
}

#howto ol li:hover {
  background: rgba(233, 69, 96, 0.1);
}

/* ===== CONTACT ===== */
#contact {
  background: var(--gradient-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

#contact:hover {
  box-shadow: var(--shadow-lg), 0 0 30px var(--accent-glow);
  border-color: rgba(233, 69, 96, 0.25);
}

#contact h3 {
  color: var(--gold);
  margin-top: 28px;
}

#contact h3:first-of-type {
  margin-top: 0;
}

/* ===== SITEMAP & LINKS ===== */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#sitemap ul li,
#links ul li {
  flex: 0 0 auto;
  padding: 0;
  background: transparent;
  border: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

#sitemap ul li::before,
#links ul li::before {
  display: none;
}

#sitemap ul li a,
#links ul li a {
  display: inline-block;
  padding: 10px 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: var(--shadow-sm), 0 0 16px var(--accent-glow);
}

/* ===== FOOTER ===== */
footer[role="contentinfo"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  border-top: 1px solid var(--bg-glass-border);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}

footer[role="contentinfo"] section {
  animation: fadeInUp 0.6s ease-out both;
}

footer[role="contentinfo"] h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--bg-glass-border);
  position: relative;
}

footer[role="contentinfo"] h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 1px;
}

footer[role="contentinfo"] p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 10px;
}

footer[role="contentinfo"] ul li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 5px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

footer[role="contentinfo"] ul li:hover {
  color: var(--accent);
  padding-left: 6px;
}

footer[role="contentinfo"] a {
  font-size: 0.85rem;
}

footer[role="contentinfo"] > p:last-child {
  grid-column: 1 / -1;
  text-align: center;
  padding-top: 24px;
  margin-top: 16px;
  border-top: 1px solid var(--bg-glass-border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

footer section[id^="privacy"],
footer section[id^="disclaimer"],
footer section[id^="terms"] {
  grid-column: 1 / -1;
}

footer section[id^="privacy"] p,
footer section[id^="disclaimer"] p,
footer section[id^="terms"] p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  header nav {
    padding: 0 16px;
    height: auto;
    min-height: var(--nav-height);
    flex-direction: column;
    align-items: flex-start;
    padding-top: 12px;
    padding-bottom: 12px;
    gap: 8px;
  }

  header nav > a:first-child {
    font-size: 1.2rem;
  }

  header nav ul {
    width: 100%;
    gap: 2px;
    padding-bottom: 4px;
  }

  header nav ul li a {
    padding: 6px 10px;
    font-size: 0.8rem;
  }

  main {
    padding: 0 16px 60px;
  }

  #hero {
    padding: 40px 0 30px;
  }

  #hero h1 {
    font-size: clamp(1.4rem, 6vw, 2rem);
  }

  #brand,
  #solutions,
  #howto,
  #contact {
    padding: 24px 20px;
  }

  main > section[id^="article-"] {
    padding: 22px 20px;
  }

  main > section {
    margin-bottom: 40px;
  }

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

  footer[role="contentinfo"] {
    padding: 32px 16px 24px;
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

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

  header nav ul li a {
    padding: 5px 8px;
    font-size: 0.75rem;
  }

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

  #hero > p {
    font-size: 0.9rem;
  }

  #hero figure {
    border-radius: var(--radius-lg);
  }

  main > section > h2 {
    font-size: 1.2rem;
  }

  main > section h3 {
    font-size: 1rem;
  }

  main > section ul li,
  main > section ol li {
    padding: 8px 12px 8px 32px;
    font-size: 0.88rem;
  }

  #faq details summary {
    padding: 14px 16px;
    font-size: 0.88rem;
  }

  #faq details p {
    font-size: 0.84rem;
  }

  #sitemap ul li a,
  #links ul li a {
    padding: 8px 14px;
    font-size: 0.8rem;
  }
}

/* ===== REDUCED MOTION ===== */
@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;
  }
}

/* ===== PRINT ===== */
@media print {
  header[role="banner"] {
    position: static;
    background: #fff;
    color: #000;
  }

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

  #hero::before {
    display: none;
  }

  #hero figure {
    box-shadow: none;
    border: 1px solid #ccc;
  }

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