:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --primary-light: #ff6b6b;
  --secondary: #457b9d;
  --secondary-dark: #1d3557;
  --accent: #2a9d8f;
  --accent-light: #52b788;
  --bg: #f8f9fa;
  --bg-alt: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-glass: rgba(255, 255, 255, 0.25);
  --text: #1a1a2e;
  --text-secondary: #4a4a5a;
  --text-muted: #7a7a8a;
  --border: rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 30px rgba(230, 57, 70, 0.25);
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --gradient-primary: linear-gradient(135deg, #e63946 0%, #ff6b6b 50%, #ff9a8b 100%);
  --gradient-secondary: linear-gradient(135deg, #457b9d 0%, #2a9d8f 100%);
  --gradient-hero: linear-gradient(135deg, #e63946 0%, #c1121f 30%, #457b9d 70%, #2a9d8f 100%);
  --gradient-card: linear-gradient(135deg, rgba(230, 57, 70, 0.08) 0%, rgba(42, 157, 143, 0.08) 100%);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s 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;
}

[data-theme="dark"] {
  --bg: #0f0f1a;
  --bg-alt: #1a1a2e;
  --bg-card: rgba(30, 30, 50, 0.75);
  --bg-glass: rgba(30, 30, 50, 0.4);
  --text: #eaeaea;
  --text-secondary: #b0b0c0;
  --text-muted: #808090;
  --border: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(230, 57, 70, 0.4);
  --gradient-card: linear-gradient(135deg, rgba(230, 57, 70, 0.15) 0%, rgba(42, 157, 143, 0.15) 100%);
}

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

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

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

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

ul, ol {
  list-style: none;
}

/* ============ Header ============ */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 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(--border);
  transition: background var(--transition), box-shadow var(--transition);
}

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

#site-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;
}

.nav-brand a {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

.nav-brand a svg {
  border-radius: 50%;
  transition: transform var(--transition);
}

.nav-brand a:hover svg {
  transform: rotate(360deg) scale(1.1);
}

.nav-brand a span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: all var(--transition);
  transform: translateX(-50%);
}

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

.nav-menu a:hover::after {
  width: 60%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-actions button {
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font);
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-actions button:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(230, 57, 70, 0.08);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#mobile-menu-btn {
  display: none;
}

#search-box {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 16px;
  animation: slideDown 0.3s ease;
}

#search-box form {
  display: flex;
  gap: 8px;
}

#search-box input {
  flex: 1;
  padding: 12px 18px;
  font-size: 0.95rem;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition: all var(--transition);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

#search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.15);
}

#search-box button {
  padding: 12px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font);
  color: #fff;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

#search-box button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ Breadcrumb ============ */
#breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--header-height) + 20px) 24px 0;
}

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

#breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: 8px;
  color: var(--text-muted);
}

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

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

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

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

section {
  padding: 64px 0;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

section h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 32px;
  letter-spacing: -0.02em;
  position: relative;
  padding-left: 20px;
}

section h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.1em;
  bottom: 0.1em;
  width: 5px;
  background: var(--gradient-primary);
  border-radius: 4px;
}

section h3 {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 700;
  margin: 36px 0 16px;
  color: var(--text);
  letter-spacing: -0.01em;
}

section h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--secondary);
}

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

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

section ul li, section ol li {
  position: relative;
  padding: 8px 0 8px 28px;
  color: var(--text-secondary);
  line-height: 1.7;
}

section ul li::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 16px;
  width: 8px;
  height: 8px;
  background: var(--gradient-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(230, 57, 70, 0.4);
}

section ol {
  counter-reset: item;
}

section ol li {
  counter-increment: item;
  padding-left: 40px;
}

section ol li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 8px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-primary);
  border-radius: 50%;
}

section strong {
  color: var(--text);
  font-weight: 700;
}

/* ============ Hero ============ */
#hero {
  padding: 48px 0 64px;
  text-align: center;
  position: relative;
}

#hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 140%;
  background: radial-gradient(ellipse at center, rgba(230, 57, 70, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

#hero h1 {
  font-size: clamp(1.6rem, 4.5vw, 3rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease both;
}

#hero > p {
  max-width: 800px;
  margin: 0 auto 32px;
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  color: var(--text-secondary);
  line-height: 1.9;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  color: #fff;
  background: var(--gradient-primary);
  border: none;
  box-shadow: 0 4px 20px rgba(230, 57, 70, 0.35);
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.6s ease;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(230, 57, 70, 0.5);
  color: #fff;
}

.btn-primary:hover::after {
  left: 100%;
}

.btn-secondary {
  color: var(--primary);
  background: var(--bg-card);
  border: 2px solid var(--primary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(230, 57, 70, 0.4);
}

/* ============ Banner Carousel ============ */
#banner-carousel {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 0 auto 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.8s ease 0.3s both;
}

#banner-carousel .slide {
  display: none;
  width: 100%;
}

#banner-carousel .slide.active {
  display: block;
  animation: fadeIn 0.6s ease;
}

#banner-carousel svg {
  width: 100%;
  height: auto;
  display: block;
}

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

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ Hero Stats ============ */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.stat-item {
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(230, 57, 70, 0.2);
}

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

.stat-number {
  display: block;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

/* ============ About ============ */
#about {
  background: var(--bg-alt);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  margin: 32px 0;
  border: 1px solid var(--border);
  transition: background var(--transition);
}

#about h3 {
  color: var(--primary);
}

#about ul li::before {
  background: var(--gradient-secondary);
  box-shadow: 0 0 8px rgba(69, 123, 157, 0.4);
}

/* ============ Products ============ */
#products {
  padding: 64px 0;
}

#products h3 {
  padding: 20px 24px;
  background: var(--gradient-card);
  border-radius: var(--radius) var(--radius) 0 0;
  border-left: 4px solid var(--primary);
  margin: 32px 0 0;
}

#products h3 + p,
#products h3 + ul,
#products h4 + ul {
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  margin-top: 0;
  transition: all var(--transition);
}

#products h3 + p:hover,
#products h3 + ul:hover {
  box-shadow: var(--shadow);
}

#products h4 {
  padding-left: 24px;
  color: var(--secondary);
}

#products h4 + ul {
  border-radius: var(--radius);
  margin-top: 8px;
}

/* ============ Advantages ============ */
#advantages {
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  margin: 32px 0;
  border: 1px solid var(--border);
}

#advantages h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
}

#advantages h3::before {
  content: '';
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(42, 157, 143, 0.5);
}

#advantages p {
  padding-left: 22px;
  border-left: 2px solid var(--border);
  margin-left: 4px;
}

/* ============ Solutions ============ */
#solutions h3 {
  padding: 16px 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition);
  cursor: default;
}

#solutions h3:hover {
  transform: translateX(8px);
  border-color: var(--primary);
  box-shadow: var(--shadow);
  color: var(--primary);
}

#solutions p {
  padding: 0 20px;
  margin-top: 12px;
}

/* ============ Industry ============ */
#industry {
  background: var(--bg-alt);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  margin: 32px 0;
  border: 1px solid var(--border);
}

#industry h3 {
  color: var(--secondary);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
  transition: border-color var(--transition);
}

#industry h3:hover {
  border-color: var(--secondary);
}

/* ============ Cases ============ */
#cases {
  padding: 64px 0;
}

#cases h3 {
  padding: 24px 28px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  margin: 24px 0 0;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}

#cases h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-primary);
}

#cases h3:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(230, 57, 70, 0.2);
}

#cases h3 + p {
  padding: 20px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  margin-top: 0;
}

/* ============ Testimonials ============ */
#testimonials {
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  margin: 32px 0;
  border: 1px solid var(--border);
}

#testimonials blockquote {
  position: relative;
  padding: 28px 32px 28px 56px;
  margin: 20px 0;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition);
}

#testimonials blockquote::before {
  content: '\201C';
  position: absolute;
  left: 16px;
  top: 8px;
  font-size: 3.5rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.4;
  font-family: Georgia, serif;
}

#testimonials blockquote:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-lg);
  border-color: rgba(230, 57, 70, 0.2);
}

#testimonials blockquote p {
  font-size: 1rem;
  font-style: italic;
  color: var(--text);
  margin-bottom: 12px;
}

#testimonials blockquote footer {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* ============ News & Articles ============ */
#news article,
#articles article {
  padding: 28px;
  margin: 20px 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

#news article::after,
#articles article::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(230, 57, 70, 0.15);
}

#news article:hover::after,
#articles article:hover::after {
  transform: scaleX(1);
}

#news article h3,
#articles article h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

#news article h3 a,
#articles article h3 a {
  color: var(--text);
  transition: color var(--transition-fast);
}

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

#news article time,
#articles article time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  padding: 2px 12px;
  background: var(--gradient-card);
  border-radius: 20px;
}

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

#articles article > a:last-child {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  transition: all var(--transition-fast);
}

#articles article > a:last-child::after {
  content: '\2192';
  transition: transform var(--transition-fast);
}

#articles article > a:last-child:hover {
  gap: 10px;
}

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

/* ============ HowTo ============ */
#howto {
  background: var(--bg-alt);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  margin: 32px 0;
  border: 1px solid var(--border);
}

#howto h3 {
  color: var(--accent);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
}

#howto ol {
  counter-reset: item;
}

#howto ol li {
  padding: 16px 20px 16px 56px;
  margin: 10px 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition);
  counter-increment: item;
}

#howto ol li::before {
  content: counter(item);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-secondary);
  border-radius: 50%;
}

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

#howto ul li::before {
  background: var(--accent);
  box-shadow: 0 0 8px rgba(42, 157, 143, 0.4);
}

/* ============ FAQ ============ */
#faq details {
  margin: 12px 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  transition: all var(--transition);
}

#faq details[open] {
  border-color: rgba(230, 57, 70, 0.25);
  box-shadow: var(--shadow);
}

#faq details:hover {
  border-color: rgba(230, 57, 70, 0.2);
}

#faq summary {
  padding: 18px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: color var(--transition-fast);
  user-select: none;
}

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

#faq summary::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--primary);
  transition: transform var(--transition);
  line-height: 1;
}

#faq details[open] summary::after {
  content: '\2212';
  transform: translateY(-50%) rotate(180deg);
}

#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: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  animation: fadeIn 0.3s ease;
}

/* ============ Contact ============ */
#contact {
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  margin: 32px 0;
  border: 1px solid var(--border);
}

#contact address {
  font-style: normal;
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  margin: 16px 0;
}

#contact address p {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

#contact address p:last-child {
  margin-bottom: 0;
}

#contact ul li::before {
  background: var(--gradient-secondary);
  box-shadow: 0 0 8px rgba(69, 123, 157, 0.4);
}

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

#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: 8px 18px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-fast);
}

#sitemap ul a:hover,
#links ul a:hover {
  color: #fff;
  background: var(--gradient-primary);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(230, 57, 70, 0.35);
}

#links ul a {
  border-radius: var(--radius-sm);
}

#links ul a:hover {
  background: var(--gradient-secondary);
  box-shadow: 0 6px 20px rgba(69, 123, 157, 0.35);
}

/* ============ Footer ============ */
footer {
  margin-top: 64px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  transition: background var(--transition);
}

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

.footer-section h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
  position: relative;
  padding-bottom: 10px;
}

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

.footer-section p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

.footer-section ul li {
  padding: 4px 0;
}

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

.footer-section ul a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  display: inline-block;
}

.footer-section ul a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

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

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  line-height: 1.7;
}

.footer-bottom a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

/* ============ Back to Top ============ */
#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  color: #fff;
  background: var(--gradient-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(230, 57, 70, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
}

#back-to-top::before {
  content: '\2191';
  font-size: 1.2rem;
  font-weight: 700;
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 8px 30px rgba(230, 57, 70, 0.6);
}

/* ============ Scrollbar ============ */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

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

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

/* ============ Selection ============ */
::selection {
  background: rgba(230, 57, 70, 0.25);
  color: var(--text);
}

/* ============ Focus Visible ============ */
:focus-visible {
  outline: 3px solid rgba(230, 57, 70, 0.5);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ============ Responsive - Tablet ============ */
@media (max-width: 1024px) {
  .nav-menu {
    gap: 0;
  }

  .nav-menu a {
    padding: 8px 10px;
    font-size: 0.82rem;
  }

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

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}

/* ============ Responsive - Mobile ============ */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  #site-header nav {
    padding: 0 16px;
  }

  .nav-brand a {
    font-size: 1.1rem;
  }

  .nav-brand a svg {
    width: 34px;
    height: 34px;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px;
    background: var(--bg-glass);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

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

  .nav-menu a {
    padding: 14px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
  }

  .nav-menu a::after {
    display: none;
  }

  .nav-menu a:hover {
    background: rgba(230, 57, 70, 0.08);
  }

  #mobile-menu-btn {
    display: block;
  }

  #search-toggle,
  #theme-toggle {
    padding: 8px 12px;
    font-size: 0.8rem;
  }

  #search-box {
    padding: 0 16px 12px;
  }

  #search-box form {
    flex-direction: column;
  }

  #search-box button {
    width: 100%;
  }

  #breadcrumb {
    padding: calc(var(--header-height) + 16px) 16px 0;
  }

  main {
    padding: 0 16px;
  }

  section {
    padding: 40px 0;
  }

  section h2 {
    margin-bottom: 24px;
    padding-left: 16px;
  }

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

  #hero {
    padding: 32px 0 40px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-bottom: 36px;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    padding: 14px 24px;
  }

  #banner-carousel {
    border-radius: var(--radius);
    margin-bottom: 36px;
  }

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

  .stat-item {
    padding: 18px 12px;
  }

  #about,
  #advantages,
  #industry,
  #testimonials,
  #howto,
  #contact {
    padding: 36px 20px;
    border-radius: var(--radius-lg);
    margin: 20px 0;
  }

  #products h3 {
    padding: 16px 18px;
    font-size: 1.05rem;
  }

  #products h3 + p,
  #products h3 + ul,
  #products h4 + ul {
    padding: 16px 18px;
  }

  #products h4 {
    padding-left: 18px;
  }

  #solutions h3 {
    padding: 14px 16px;
    font-size: 1.05rem;
  }

  #solutions p {
    padding: 0 16px;
  }

  #cases h3 {
    padding: 18px 20px;
    font-size: 1.05rem;
  }

  #cases h3 + p {
    padding: 16px 20px;
  }

  #testimonials blockquote {
    padding: 24px 20px 24px 48px;
  }

  #testimonials blockquote::before {
    left: 12px;
    font-size: 2.8rem;
  }

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

  #howto ol li {
    padding: 14px 16px 14px 48px;
  }

  #howto ol li::before {
    left: 12px;
    width: 24px;
    height: 24px;
    font-size: 0.72rem;
  }

  #faq summary {
    padding: 16px 40px 16px 18px;
    font-size: 0.9rem;
  }

  #faq summary::after {
    right: 16px;
  }

  #faq details p {
    padding: 14px 18px 18px;
    font-size: 0.88rem;
  }

  #contact address {
    padding: 18px;
  }

  #sitemap ul a,
  #links ul a {
    padding: 7px 14px;
    font-size: 0.82rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 16px 32px;
  }

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

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

/* ============ Responsive - Small Mobile ============ */
@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

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

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

  .stat-label {
    font-size: 0.72rem;
  }

  #hero h1 {
    font-size: 1.4rem;
  }

  section h2 {
    font-size: 1.3rem;
  }

  section h3 {
    font-size: 1.05rem;
  }

  #about,
  #advantages,
  #industry,
  #testimonials,
  #howto,
  #contact {
    padding: 28px 16px;
  }

  #testimonials blockquote {
    padding: 20px 16px 20px 42px;
  }

  #testimonials blockquote::before {
    left: 10px;
    font-size: 2.4rem;
  }

  .footer-section h3 {
    font-size: 0.95rem;
  }
}

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

  section {
    opacity: 1;
    transform: none;
  }
}

/* ============ Print ============ */
@media print {
  #site-header,
  #back-to-top,
  .hero-actions,
  #banner-carousel,
  .hero-stats,
  footer {
    display: none !important;
  }

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

  section {
    opacity: 1;
    transform: none;
    page-break-inside: avoid;
  }

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