:root {
  --primary: #FF6B35;
  --primary-dark: #E85A2A;
  --primary-light: #FF8C5A;
  --primary-glow: rgba(255, 107, 53, 0.4);
  --secondary: #FFB347;
  --accent: #FF4757;
  --bg: #FFF8F3;
  --bg-alt: #FFF0E6;
  --surface: #FFFFFF;
  --surface-glass: rgba(255, 255, 255, 0.72);
  --surface-glass-border: rgba(255, 255, 255, 0.5);
  --text: #2D2016;
  --text-secondary: #6B5D52;
  --text-muted: #9B8E83;
  --border: rgba(255, 107, 53, 0.12);
  --shadow-sm: 0 2px 8px rgba(255, 107, 53, 0.06);
  --shadow-md: 0 8px 24px rgba(255, 107, 53, 0.1);
  --shadow-lg: 0 16px 48px rgba(255, 107, 53, 0.14);
  --shadow-glow: 0 0 32px rgba(255, 107, 53, 0.2);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #FF8C5A;
    --primary-dark: #FF6B35;
    --primary-light: #FFA87A;
    --primary-glow: rgba(255, 140, 90, 0.35);
    --secondary: #FFC97A;
    --accent: #FF6B7A;
    --bg: #1A1410;
    --bg-alt: #221C17;
    --surface: #2A221C;
    --surface-glass: rgba(42, 34, 28, 0.78);
    --surface-glass-border: rgba(255, 140, 90, 0.15);
    --text: #F5EDE6;
    --text-secondary: #C4B5A8;
    --text-muted: #8A7D72;
    --border: rgba(255, 140, 90, 0.12);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 32px rgba(255, 140, 90, 0.15);
  }
}

*,
*::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%;
}

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition), color var(--transition);
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 80% 60% at 10% 5%, rgba(255, 107, 53, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 90%, rgba(255, 179, 71, 0.05) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

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

a:hover {
  color: var(--primary-dark);
  opacity: 0.85;
}

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text);
  transition: color var(--transition);
}

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, 1.5rem); }
h4 { font-size: clamp(1rem, 1.8vw, 1.2rem); }

p {
  margin-bottom: 1em;
  color: var(--text-secondary);
}

p:last-child {
  margin-bottom: 0;
}

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

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

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

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

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

/* ========== HEADER / NAV ========== */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--surface-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--surface-glass-border);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

header nav > a:first-child {
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
  white-space: nowrap;
  animation: gradientShift 6s ease infinite;
  transition: transform var(--transition);
}

header nav > a:first-child:hover {
  transform: scale(1.04);
  opacity: 1;
}

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

header nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: 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-full);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

header nav ul li a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  transition: width var(--transition);
}

header nav ul li a:hover {
  color: var(--primary);
  background: rgba(255, 107, 53, 0.08);
  transform: translateY(-1px);
  opacity: 1;
}

header nav ul li a:hover::after {
  width: 60%;
}

/* ========== MAIN LAYOUT ========== */
main {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

section {
  margin-bottom: 56px;
  scroll-margin-top: calc(var(--header-height) + 24px);
}

section > h2 {
  position: relative;
  padding-bottom: 16px;
  margin-bottom: 28px;
  display: inline-block;
}

section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
}

section > h2::after {
  content: "";
  position: absolute;
  left: 56px;
  bottom: 0;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, rgba(255, 107, 53, 0.15), transparent);
  border-radius: var(--radius-full);
}

section > h3 {
  margin-top: 28px;
  margin-bottom: 12px;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  gap: 10px;
}

section > h3::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  flex-shrink: 0;
  box-shadow: 0 0 8px var(--primary-glow);
}

section > h4 {
  margin-top: 20px;
  margin-bottom: 10px;
  color: var(--text);
}

section > p {
  margin-bottom: 16px;
  text-align: justify;
}

/* ========== HERO ========== */
#hero {
  position: relative;
  padding: 64px 40px;
  margin-top: 32px;
  margin-bottom: 64px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #FF6B35 0%, #FF8C5A 30%, #FFB347 65%, #FFD93D 100%);
  background-size: 200% 200%;
  animation: heroGradient 12s ease infinite;
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  color: #fff;
}

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

#hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

#hero h1 {
  position: relative;
  z-index: 1;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

#hero p {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.05rem;
  line-height: 1.9;
  text-align: justify;
  max-width: 900px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

#hero p + p {
  margin-top: 16px;
}

/* ========== BRAND ========== */
#brand {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#brand p {
  line-height: 1.9;
}

/* ========== PRODUCTS ========== */
#products {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#products h3 {
  padding: 16px 20px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.06), rgba(255, 179, 71, 0.06));
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

#products h3:hover {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(255, 179, 71, 0.1));
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

/* ========== ADVANTAGES ========== */
#advantages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

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

#advantages > h3 {
  margin-top: 0;
  padding: 24px 24px 12px;
  background: var(--surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  border-bottom: none;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

#advantages > h3:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

#advantages > p {
  padding: 0 24px 24px;
  background: var(--surface);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  border-top: none;
  margin-bottom: 0;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#advantages > h3:hover + p {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

/* ========== SOLUTIONS ========== */
#solutions {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#solutions h3 {
  padding: 14px 0;
  border-bottom: 1px dashed var(--border);
  transition: border-color var(--transition), color var(--transition);
}

#solutions h3:hover {
  border-bottom-color: var(--primary);
  color: var(--primary);
}

/* ========== CASES ========== */
#cases {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#cases h3 {
  padding: 18px 20px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.05), rgba(255, 179, 71, 0.05));
  border-radius: var(--radius-md);
  margin-top: 20px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

#cases h3:hover {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(255, 179, 71, 0.1));
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

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

#cases h3 + p {
  padding: 0 20px 16px;
  font-style: normal;
  line-height: 1.9;
}

#cases h3:last-of-type + p ~ p {
  padding: 10px 20px;
  margin: 8px 0;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--secondary);
  font-size: 0.925rem;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

#cases h3:last-of-type + p ~ p:hover {
  background: rgba(255, 107, 53, 0.06);
  border-left-color: var(--primary);
  transform: translateX(4px);
}

/* ========== NEWS ========== */
#news {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

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

#news article {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#news article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

#news article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 107, 53, 0.25);
}

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

#news article h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.1rem;
  color: var(--text);
  transition: color var(--transition);
}

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

#news article p:first-of-type {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

#news article p:first-of-type::before {
  content: "🕐";
  font-size: 0.85rem;
}

#news article p:last-of-type {
  font-size: 0.925rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

/* ========== ARTICLES ========== */
#articles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

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

#articles article {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#articles article::after {
  content: "";
  position: absolute;
  bottom: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at bottom right, rgba(255, 107, 53, 0.08), transparent 70%);
  border-radius: 50% 0 0 0;
  transition: width var(--transition), height var(--transition), background var(--transition);
}

#articles article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 107, 53, 0.25);
}

#articles article:hover::after {
  width: 140px;
  height: 140px;
  background: radial-gradient(circle at bottom right, rgba(255, 107, 53, 0.14), transparent 70%);
}

#articles article h3 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.1rem;
  color: var(--text);
  transition: color var(--transition);
}

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

#articles article p:first-of-type {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

#articles article p:first-of-type::before {
  content: "📅 ";
}

#articles article p:nth-of-type(2) {
  font-size: 0.925rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

#articles article p:last-of-type {
  margin-bottom: 0;
}

#articles article p:last-of-type a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(255, 179, 71, 0.1));
  color: var(--primary);
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

#articles article p:last-of-type a::after {
  content: "→";
  transition: transform var(--transition);
}

#articles article p:last-of-type a:hover {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  opacity: 1;
}

#articles article p:last-of-type a:hover::after {
  transform: translateX(4px);
}

/* ========== FAQ ========== */
#faq {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

#faq details:hover {
  border-color: rgba(255, 107, 53, 0.25);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  border-color: rgba(255, 107, 53, 0.3);
  box-shadow: var(--shadow-md);
  background: var(--surface);
}

#faq details summary {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: color var(--transition), background var(--transition);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

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

#faq details summary::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--primary);
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.08);
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

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

#faq details summary:hover {
  color: var(--primary);
  background: rgba(255, 107, 53, 0.04);
}

#faq details > p {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--text-secondary);
  animation: fadeInUp 0.4s ease;
}

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

/* ========== HOWTO ========== */
#howto {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#howto h3 {
  margin-top: 32px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
  transition: border-color var(--transition);
}

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

#howto h3:hover {
  border-bottom-color: var(--primary);
}

#howto h4 {
  padding: 14px 18px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.06), rgba(255, 179, 71, 0.06));
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  margin-top: 20px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

#howto h4:hover {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(255, 179, 71, 0.1));
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

#howto h4 + p {
  padding-left: 18px;
  margin-top: 10px;
}

/* ========== CONTACT ========== */
#contact {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#contact h3 {
  margin-top: 28px;
}

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

#contact p {
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: border-color var(--transition), padding-left var(--transition), color var(--transition);
}

#contact p:hover {
  border-bottom-color: var(--primary);
  padding-left: 8px;
  color: var(--primary);
}

#contact p:last-child {
  border-bottom: none;
}

#contact p::before {
  content: "•";
  color: var(--primary);
  font-weight: bold;
  flex-shrink: 0;
}

/* ========== SITEMAP & LINKS ========== */
#sitemap,
#links {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

#sitemap ul li a,
#links ul li a {
  display: inline-block;
  padding: 10px 20px;
  background: var(--bg-alt);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
  opacity: 1;
}

/* ========== FOOTER ========== */
footer {
  position: relative;
  z-index: 1;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 56px 24px 40px;
  margin-top: 40px;
  transition: background var(--transition), border-color var(--transition);
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition);
}

footer > section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

footer > section h2 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

footer > section h2::before {
  content: "";
  width: 4px;
  height: 18px;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

footer > section p {
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--text-muted);
  margin-bottom: 6px;
}

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

#footer-info p {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  transition: color var(--transition), padding-left var(--transition);
}

#footer-info p:hover {
  color: var(--primary);
  padding-left: 6px;
}

#footer-info p::before {
  content: "▸";
  color: var(--primary);
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* ========== SCROLL ANIMATIONS ========== */
@keyframes revealUp {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes revealScale {
  from {
    opacity: 0;
    transform: scale(0.96);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes revealLeft {
  from {
    opacity: 0;
    transform: translateX(-24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

section {
  animation: revealUp 0.7s ease both;
}

#hero {
  animation: revealScale 0.8s ease both;
}

#brand,
#products,
#solutions,
#cases,
#faq,
#howto,
#contact,
#sitemap,
#links {
  animation: revealUp 0.7s ease both;
}

#news article,
#articles article {
  animation: revealUp 0.6s ease both;
}

#news article:nth-child(2) { animation-delay: 0.05s; }
#news article:nth-child(3) { animation-delay: 0.1s; }
#news article:nth-child(4) { animation-delay: 0.15s; }
#news article:nth-child(5) { animation-delay: 0.2s; }
#news article:nth-child(6) { animation-delay: 0.25s; }

#articles article:nth-child(2) { animation-delay: 0.05s; }
#articles article:nth-child(3) { animation-delay: 0.1s; }
#articles article:nth-child(4) { animation-delay: 0.15s; }
#articles article:nth-child(5) { animation-delay: 0.2s; }
#articles article:nth-child(6) { animation-delay: 0.25s; }
#articles article:nth-child(7) { animation-delay: 0.3s; }
#articles article:nth-child(8) { animation-delay: 0.35s; }
#articles article:nth-child(9) { animation-delay: 0.4s; }
#articles article:nth-child(10) { animation-delay: 0.45s; }
#articles article:nth-child(11) { animation-delay: 0.5s; }

@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;
  }
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  :root {
    --max-width: 100%;
  }

  header nav {
    padding: 0 16px;
  }

  main {
    padding: 0 16px 60px;
  }

  #hero {
    padding: 48px 28px;
    margin-top: 24px;
  }

  #brand,
  #products,
  #solutions,
  #cases,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links {
    padding: 32px 24px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
    --radius-lg: 20px;
    --radius-xl: 24px;
  }

  body {
    font-size: 15px;
    line-height: 1.75;
  }

  header nav {
    flex-direction: column;
    height: auto;
    padding: 10px 16px;
    gap: 8px;
  }

  header nav > a:first-child {
    font-size: 1.25rem;
  }

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

  header nav ul li a {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  main {
    padding: 0 12px 48px;
  }

  section {
    margin-bottom: 40px;
  }

  #hero {
    padding: 36px 20px;
    margin-top: 16px;
    margin-bottom: 40px;
    border-radius: var(--radius-lg);
  }

  #hero p {
    font-size: 0.95rem;
    text-align: left;
  }

  #brand,
  #products,
  #solutions,
  #cases,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links {
    padding: 24px 16px;
    border-radius: var(--radius-md);
  }

  #advantages {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  #news,
  #articles {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  #news article,
  #articles article {
    padding: 22px 18px;
  }

  #faq details summary {
    padding: 14px 16px;
    font-size: 0.925rem;
  }

  #faq details > p {
    padding: 0 16px 16px;
    font-size: 0.9rem;
  }

  #howto h4 {
    padding: 12px 14px;
    font-size: 0.95rem;
  }

  #howto h4 + p {
    padding-left: 14px;
  }

  #contact p {
    font-size: 0.9rem;
    flex-wrap: wrap;
  }

  #sitemap ul,
  #links ul {
    gap: 8px;
  }

  #sitemap ul li a,
  #links ul li a {
    padding: 8px 14px;
    font-size: 0.825rem;
  }

  footer {
    padding: 40px 16px 32px;
  }

  footer > section {
    margin-bottom: 24px;
    padding-bottom: 18px;
  }

  footer > section h2 {
    font-size: 1rem;
  }

  footer > section p {
    font-size: 0.825rem;
  }
}

@media (max-width: 480px) {
  :root {
    --header-height: 56px;
  }

  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.05rem; }

  #hero {
    padding: 28px 16px;
    border-radius: var(--radius-md);
  }

  #hero h1 {
    font-size: 1.35rem;
  }

  #hero p {
    font-size: 0.875rem;
  }

  #brand,
  #products,
  #solutions,
  #cases,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links {
    padding: 20px 14px;
    border-radius: var(--radius-sm);
  }

  section > h2 {
    padding-bottom: 12px;
    margin-bottom: 20px;
  }

  section > h2::before {
    width: 36px;
    height: 3px;
  }

  section > h2::after {
    left: 42px;
    width: 60px;
    height: 3px;
  }

  #news article,
  #articles article {
    padding: 18px 14px;
    border-radius: var(--radius-md);
  }

  #news article h3,
  #articles article h3 {
    font-size: 1rem;
  }

  #faq details summary {
    padding: 12px 14px;
    font-size: 0.875rem;
  }

  #faq details summary::after {
    width: 24px;
    height: 24px;
    font-size: 1.2rem;
  }

  #faq details > p {
    padding: 0 14px 14px;
    font-size: 0.85rem;
  }

  #sitemap ul li a,
  #links ul li a {
    padding: 7px 12px;
    font-size: 0.8rem;
  }

  footer {
    padding: 32px 12px 24px;
  }

  footer > section h2 {
    font-size: 0.95rem;
  }

  footer > section p {
    font-size: 0.8rem;
  }
}

@media (min-width: 1400px) {
  :root {
    --max-width: 1320px;
  }

  body {
    font-size: 17px;
  }
}

@media print {
  header,
  footer,
  #sitemap,
  #links {
    display: none;
  }

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

  main {
    max-width: 100%;
    padding: 0;
  }

  #hero {
    background: #f5f5f5;
    color: #000;
    box-shadow: none;
  }

  #hero h1,
  #hero p {
    color: #000;
  }

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

@media (hover: none) {
  #news article:hover,
  #articles article:hover,
  #advantages > h3:hover,
  #advantages > h3:hover + p {
    transform: none;
  }

  #sitemap ul li a:hover,
  #links ul li a:hover {
    transform: none;
  }
}

@supports (backdrop-filter: blur(20px)) {
  header {
    background: var(--surface-glass);
  }
}

@supports not (backdrop-filter: blur(20px)) {
  header {
    background: var(--surface);
  }
}