:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --primary-light: #ff6b7a;
  --secondary: #1d3557;
  --accent: #6d28d9;
  --bg: #ffffff;
  --bg-alt: #f8f9fc;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #555770;
  --text-muted: #8888a0;
  --border: #e8eaf0;
  --shadow-sm: 0 2px 8px rgba(29, 53, 87, 0.06);
  --shadow-md: 0 8px 24px rgba(29, 53, 87, 0.1);
  --shadow-lg: 0 16px 48px rgba(29, 53, 87, 0.14);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-blur: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --header-height: 68px;
}

[data-theme="dark"] {
  --primary: #ff6b7a;
  --primary-dark: #e63946;
  --primary-light: #ff9aa5;
  --secondary: #a8c5e8;
  --accent: #a78bfa;
  --bg: #0f0f1a;
  --bg-alt: #16162a;
  --bg-card: #1c1c32;
  --text: #e8e8f0;
  --text-secondary: #b0b0c8;
  --text-muted: #7a7a95;
  --border: #2a2a45;
  --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);
  --glass-bg: rgba(28, 28, 50, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
}

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

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

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

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

ul, ol {
  list-style: none;
}

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

input {
  font-family: inherit;
  font-size: inherit;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==================== HEADER ==================== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

.header-inner {
  max-width: 1280px;
  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;
  text-decoration: none;
}

.logo svg {
  transition: transform var(--transition);
}

.logo:hover svg {
  transform: rotate(-8deg) scale(1.08);
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

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

#main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition), background var(--transition);
}

#main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition);
}

#main-nav a:hover {
  color: var(--primary);
  background: rgba(230, 57, 70, 0.06);
}

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

#site-search {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  position: relative;
}

#search-input {
  width: 200px;
  padding: 9px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--bg-alt);
  color: var(--text);
  font-size: 0.88rem;
  outline: none;
  transition: width var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

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

#search-input:focus {
  width: 260px;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.12);
  background: var(--bg);
}

#site-search button {
  position: absolute;
  right: 4px;
  padding: 6px 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: var(--radius-xl);
  font-size: 0.82rem;
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition);
}

#site-search button:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(230, 57, 70, 0.35);
}

#theme-toggle {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  border-radius: 50%;
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  color: var(--text);
  flex-shrink: 0;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#theme-toggle:hover {
  transform: rotate(20deg) scale(1.1);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.1);
}

#menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  color: var(--text);
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition);
}

#menu-toggle:hover {
  border-color: var(--primary);
}

/* ==================== HERO ==================== */
#hero {
  max-width: 1280px;
  margin: 0 auto;
  padding: 60px 24px 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
}

#hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.08), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
}

#hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(109, 40, 217, 0.06), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
}

.hero-content h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text) 0%, var(--primary) 60%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 560px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-xl);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  opacity: 0;
  transition: opacity var(--transition);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(230, 57, 70, 0.4);
  color: #fff;
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary span,
.btn-primary {
  position: relative;
  z-index: 1;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 2px solid var(--border);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-md);
}

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

.stat-item {
  text-align: center;
  padding: 16px 8px;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.4;
}

/* ==================== BANNER ==================== */
.hero-banner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 2 / 1;
  background: linear-gradient(135deg, #fdecec, #eef6ff);
}

[data-theme="dark"] .hero-banner {
  background: linear-gradient(135deg, #1c1c32, #16162a);
}

.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
  transform: scale(1.05);
  display: flex;
  align-items: center;
  justify-content: center;
}

.banner-slide.active {
  opacity: 1;
  transform: scale(1);
}

.banner-slide svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==================== BREADCRUMB ==================== */
#breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 24px;
}

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

#breadcrumb li + li::before {
  content: '/';
  margin-right: 8px;
  color: var(--border);
}

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

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

#breadcrumb [aria-current="page"] {
  color: var(--text);
  font-weight: 500;
}

/* ==================== SECTIONS ==================== */
main > section:not(#hero):not(#breadcrumb) {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 24px;
}

main > section:nth-child(even):not(#hero):not(#breadcrumb) {
  background: var(--bg-alt);
  max-width: 100%;
  border-radius: 0;
}

main > section:nth-child(even):not(#hero):not(#breadcrumb) > * {
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
}

main > section:nth-child(even):not(#hero):not(#breadcrumb) > h2,
main > section:nth-child(even):not(#hero):not(#breadcrumb) > h3,
main > section:nth-child(even):not(#hero):not(#breadcrumb) > p,
main > section:nth-child(even):not(#hero):not(#breadcrumb) > ul,
main > section:nth-child(even):not(#hero):not(#breadcrumb) > ol,
main > section:nth-child(even):not(#hero):not(#breadcrumb) > article,
main > section:nth-child(even):not(#hero):not(#breadcrumb) > details,
main > section:nth-child(even):not(#hero):not(#breadcrumb) > blockquote {
  padding-left: 24px;
  padding-right: 24px;
}

section h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  position: relative;
  padding-left: 20px;
  color: var(--text);
}

section h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 5px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

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

section p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  line-height: 1.85;
}

section ul,
section ol {
  margin-bottom: 20px;
  padding-left: 0;
}

section ul li,
section ol li {
  position: relative;
  padding: 8px 0 8px 28px;
  color: var(--text-secondary);
  line-height: 1.75;
}

section ul li::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  transition: transform var(--transition);
}

section ul li:hover::before {
  transform: scale(1.4);
}

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

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

section ol li::before {
  content: counter(ol-counter);
  position: absolute;
  left: 0;
  top: 10px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.meta-info {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  padding: 6px 12px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  display: inline-block;
}

[data-theme="dark"] .meta-info {
  background: rgba(255, 255, 255, 0.04);
}

/* ==================== CARDS ==================== */
#brand,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links,
#privacy,
#disclaimer {
  position: relative;
}

#products ul li,
#solutions ul li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 18px 14px 36px;
  margin-bottom: 10px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#products ul li:hover,
#solutions ul li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary-light);
}

#products ul li::before,
#solutions ul li::before {
  left: 14px;
  top: 22px;
}

/* ==================== ARTICLES ==================== */
#articles article,
#news article {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-bottom: 20px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

#articles article::before,
#news article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

#articles article:hover,
#news article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

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

#articles article h3,
#news article h3 {
  margin-top: 0;
  font-size: 1.1rem;
  transition: color var(--transition);
}

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

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  margin-top: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-xl);
  background: rgba(230, 57, 70, 0.08);
  transition: background var(--transition), transform var(--transition), gap var(--transition);
}

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

#articles article a:hover {
  background: rgba(230, 57, 70, 0.15);
  transform: translateX(4px);
}

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

/* ==================== CASES / BLOCKQUOTE ==================== */
blockquote {
  position: relative;
  padding: 24px 28px 24px 56px;
  margin: 16px 0;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

blockquote::before {
  content: '"';
  position: absolute;
  left: 18px;
  top: 10px;
  font-size: 3rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.3;
  font-family: Georgia, serif;
}

blockquote:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

blockquote p {
  margin: 0;
  font-style: italic;
  color: var(--text-secondary);
}

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

#faq details:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--primary-light);
}

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

#faq summary {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 0.98rem;
  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);
  position: relative;
}

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

#faq summary::after {
  content: '+';
  font-size: 1.3rem;
  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(230, 57, 70, 0.08);
  transition: transform var(--transition), background var(--transition);
  line-height: 1;
}

#faq details[open] summary::after {
  content: '−';
  transform: rotate(180deg);
  background: rgba(230, 57, 70, 0.15);
}

#faq summary:hover {
  color: var(--primary);
}

#faq details p {
  padding: 0 24px 20px;
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.85;
  animation: fadeInDown 0.3s ease;
}

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

/* ==================== HOWTO ==================== */
#howto ol {
  counter-reset: howto-counter;
  padding-left: 0;
}

#howto ol li {
  counter-increment: howto-counter;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px 16px 52px;
  margin-bottom: 10px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

#howto ol li::before {
  content: counter(howto-counter);
  left: 16px;
  top: 18px;
  width: 26px;
  height: 26px;
  font-size: 0.78rem;
}

#howto h3 {
  display: flex;
  align-items: center;
  gap: 10px;
}

#howto h3::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  flex-shrink: 0;
}

#howto > p:last-child {
  margin-top: 24px;
  padding: 20px 24px;
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.06), rgba(109, 40, 217, 0.06));
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  font-weight: 500;
  color: var(--text);
}

/* ==================== CONTACT ==================== */
#contact ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

#contact ul li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px 16px 36px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#contact ul li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary-light);
}

#contact ul li::before {
  left: 14px;
  top: 24px;
}

#contact a {
  font-weight: 600;
  word-break: break-all;
}

/* ==================== SITEMAP & LINKS ==================== */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

#sitemap ul li,
#links ul li {
  padding: 0;
}

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

#sitemap ul a,
#links ul a {
  display: inline-block;
  padding: 10px 22px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: transform var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition), background var(--transition);
}

#sitemap ul a:hover,
#links ul a:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 6px 20px rgba(230, 57, 70, 0.15);
  background: var(--bg);
}

/* ==================== FOOTER ==================== */
#site-footer {
  background: linear-gradient(180deg, var(--secondary) 0%, #0d1b2a 100%);
  color: rgba(255, 255, 255, 0.8);
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
  background-size: 200% 100%;
  animation: gradientShift 4s ease infinite;
}

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

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
}

.footer-col h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.footer-col p {
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col ul li {
  padding: 5px 0;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col ul li::before {
  display: none;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition), padding-left var(--transition);
}

.footer-col a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 8px;
  line-height: 1.7;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a:hover {
  color: var(--primary-light);
}

/* ==================== BACK TO TOP ==================== */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(230, 57, 70, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), box-shadow var(--transition);
  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: 0 10px 32px rgba(230, 57, 70, 0.5);
}

/* ==================== PRIVACY & DISCLAIMER ==================== */
#privacy,
#disclaimer {
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  border: 1px solid var(--border);
}

#privacy p,
#disclaimer p {
  font-size: 0.9rem;
}

/* ==================== SCROLL ANIMATIONS ==================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1100px) {
  #main-nav a {
    padding: 8px 10px;
    font-size: 0.84rem;
  }

  #search-input {
    width: 160px;
  }

  #search-input:focus {
    width: 200px;
  }
}

@media (max-width: 960px) {
  :root {
    --header-height: 60px;
  }

  #menu-toggle {
    display: flex;
  }

  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    padding: 16px 24px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-slow), opacity var(--transition), visibility var(--transition);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    z-index: 999;
  }

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

  #main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

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

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

  #hero {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 20px 32px;
  }

  .hero-banner {
    order: -1;
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
  }

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

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

@media (max-width: 720px) {
  body {
    font-size: 15px;
  }

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

  .logo-text {
    font-size: 1.1rem;
  }

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

  #site-search {
    display: none;
  }

  #theme-toggle,
  #menu-toggle {
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }

  main > section:not(#hero):not(#breadcrumb) {
    padding: 40px 16px;
  }

  main > section:nth-child(even):not(#hero):not(#breadcrumb) > h2,
  main > section:nth-child(even):not(#hero):not(#breadcrumb) > h3,
  main > section:nth-child(even):not(#hero):not(#breadcrumb) > p,
  main > section:nth-child(even):not(#hero):not(#breadcrumb) > ul,
  main > section:nth-child(even):not(#hero):not(#breadcrumb) > ol,
  main > section:nth-child(even):not(#hero):not(#breadcrumb) > article,
  main > section:nth-child(even):not(#hero):not(#breadcrumb) > details,
  main > section:nth-child(even):not(#hero):not(#breadcrumb) > blockquote {
    padding-left: 16px;
    padding-right: 16px;
  }

  section h2 {
    font-size: 1.3rem;
    padding-left: 16px;
    margin-bottom: 18px;
  }

  section h2::before {
    width: 4px;
  }

  section h3 {
    font-size: 1.05rem;
  }

  #hero {
    padding: 28px 16px 24px;
  }

  .hero-content h1 {
    font-size: 1.5rem;
  }

  .hero-lead {
    font-size: 0.95rem;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .stat-item {
    padding: 12px 6px;
  }

  .stat-number {
    font-size: 1.3rem;
  }

  .stat-label {
    font-size: 0.7rem;
  }

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

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

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

  blockquote {
    padding: 20px 20px 20px 48px;
  }

  blockquote::before {
    left: 12px;
    font-size: 2.2rem;
  }

  #faq summary {
    padding: 14px 18px;
    font-size: 0.92rem;
  }

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

  #howto ol li {
    padding: 14px 14px 14px 46px;
  }

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

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

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

  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }

  #sitemap ul a,
  #links ul a {
    padding: 8px 16px;
    font-size: 0.82rem;
  }
}

@media (max-width: 400px) {
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .stat-number {
    font-size: 1.15rem;
  }

  .stat-label {
    font-size: 0.65rem;
  }

  .logo-text {
    display: none;
  }
}

/* ==================== 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;
  }

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

/* ==================== PRINT ==================== */
@media print {
  #site-header,
  #back-to-top,
  #theme-toggle,
  #menu-toggle,
  #site-search,
  .hero-banner,
  .hero-actions {
    display: none !important;
  }

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

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

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

/* ==================== SELECTION & SCROLLBAR ==================== */
::selection {
  background: rgba(230, 57, 70, 0.2);
  color: var(--text);
}

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

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

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

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--primary-dark), var(--accent));
}

html {
  scrollbar-width: thin;
  scrollbar-color: var(--primary) var(--bg-alt);
}