:root {
  --primary: #c0392b;
  --primary-light: #e74c3c;
  --primary-dark: #96281b;
  --accent: #d35400;
  --accent-light: #f39c12;
  --warm: #f5c6a0;
  --bg: #faf7f4;
  --bg-alt: #f0ebe5;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(192, 57, 43, 0.12);
  --text: #2c1810;
  --text-secondary: #6b5b52;
  --text-muted: #9e8e84;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.65);
  --glass-shadow: 0 8px 32px rgba(44, 24, 16, 0.08);
  --shadow-sm: 0 2px 8px rgba(44, 24, 16, 0.06);
  --shadow-md: 0 4px 20px rgba(44, 24, 16, 0.1);
  --shadow-lg: 0 12px 40px rgba(44, 24, 16, 0.14);
  --shadow-xl: 0 20px 60px rgba(44, 24, 16, 0.18);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s 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", "Noto Sans SC", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --max-width: 1200px;
  --header-height: 72px;
}

[data-theme="dark"] {
  --primary: #e74c3c;
  --primary-light: #ff6b5b;
  --primary-dark: #c0392b;
  --accent: #f39c12;
  --accent-light: #f5b041;
  --warm: #f5c6a0;
  --bg: #121212;
  --bg-alt: #1a1a1a;
  --card-bg: rgba(30, 30, 30, 0.72);
  --card-border: rgba(231, 76, 60, 0.18);
  --text: #f0ebe5;
  --text-secondary: #b8a99e;
  --text-muted: #7a6e65;
  --glass-bg: rgba(30, 30, 30, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
  -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), opacity var(--transition-fast);
}

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
  transition: color var(--transition-base);
}

h1 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.2vw, 1.4rem); }
h4 { font-size: clamp(1rem, 1.8vw, 1.15rem); }

p {
  margin-bottom: 0.85em;
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.sr-only {
  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);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

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

.nav-brand a {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.5px;
  transition: transform var(--transition-fast);
}

.nav-brand a:hover {
  transform: scale(1.03);
  color: var(--primary);
}

.nav-brand svg {
  flex-shrink: 0;
  filter: drop-shadow(0 2px 6px rgba(192, 57, 43, 0.35));
  transition: transform var(--transition-base);
}

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

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

.nav-links li a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

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

.nav-links li a:hover {
  color: var(--primary);
  background: rgba(192, 57, 43, 0.06);
  transform: translateY(-1px);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-actions button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.nav-actions button:hover {
  background: rgba(192, 57, 43, 0.08);
  color: var(--primary);
  transform: scale(1.08);
}

.nav-actions button:active {
  transform: scale(0.95);
}

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

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

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

#search-bar input {
  flex: 1;
  padding: 12px 20px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-full);
  background: var(--card-bg);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#search-bar input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.12);
}

#search-bar button {
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#search-bar button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(192, 57, 43, 0.35);
}

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

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

section {
  padding: 72px 0;
}

section > h2 {
  margin-bottom: 32px;
  position: relative;
  padding-bottom: 16px;
}

section > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
}

/* ===== HERO ===== */
#hero {
  padding: 0;
  margin: 0 -24px;
  overflow: hidden;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.hero-slider {
  position: relative;
  width: 100%;
  min-height: 480px;
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
  position: relative;
}

.hero-slide svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(44, 24, 16, 0.15) 0%,
    rgba(44, 24, 16, 0.45) 50%,
    rgba(44, 24, 16, 0.82) 100%
  );
  z-index: 1;
}

.slide-caption {
  position: relative;
  z-index: 2;
  padding: 48px 40px 56px;
  max-width: 720px;
}

.slide-caption h1,
.slide-caption h2 {
  color: #fff;
  margin-bottom: 14px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.slide-caption p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 22px;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.25);
}

.cta-btn {
  display: inline-block;
  padding: 13px 34px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  box-shadow: 0 6px 24px rgba(192, 57, 43, 0.4);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cta-btn:hover {
  color: #fff;
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 10px 32px rgba(192, 57, 43, 0.55);
}

.slider-prev,
.slider-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.slider-prev { left: 20px; }
.slider-next { right: 20px; }

.slider-prev:hover,
.slider-next:hover {
  background: rgba(192, 57, 43, 0.7);
  border-color: var(--primary);
  transform: translateY(-50%) scale(1.1);
}

.slider-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 10px;
}

.slider-dots button {
  width: 10px;
  height: 10px;
  border: none;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast), width var(--transition-fast);
}

.slider-dots button[aria-selected="true"] {
  background: var(--primary);
  width: 28px;
  box-shadow: 0 0 12px rgba(192, 57, 43, 0.6);
}

.slider-dots button:hover {
  background: rgba(255, 255, 255, 0.75);
  transform: scale(1.2);
}

/* ===== BREADCRUMB ===== */
#breadcrumb {
  padding: 20px 0 0;
}

#breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

#breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

#breadcrumb li + li::before {
  content: "/";
  color: var(--text-muted);
  opacity: 0.5;
}

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

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

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

/* ===== STATS ===== */
#stats {
  padding: 56px 0;
}

#stats > h2 {
  text-align: center;
  margin-bottom: 40px;
}

#stats > h2::after {
  left: 50%;
  transform: translateX(-50%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-item {
  text-align: center;
  padding: 32px 16px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(192, 57, 43, 0.25);
}

.stat-number {
  display: block;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* ===== ABOUT ===== */
#about article {
  margin-bottom: 36px;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#about article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#about article:last-child {
  margin-bottom: 0;
}

#about h3 {
  margin-bottom: 14px;
  color: var(--primary);
  position: relative;
  padding-left: 16px;
}

#about h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

/* ===== SERVICES ===== */
#services article {
  margin-bottom: 28px;
  padding: 30px 32px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#services article::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

#services article:hover::after {
  transform: scaleY(1);
}

#services article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(192, 57, 43, 0.2);
}

#services h3 {
  margin-bottom: 12px;
  color: var(--primary);
}

#services article:last-child {
  margin-bottom: 0;
}

/* ===== ADVANTAGES ===== */
#advantages ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

#advantages li {
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#advantages li:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: rgba(192, 57, 43, 0.25);
}

#advantages h3 {
  margin-bottom: 10px;
  font-size: 1.05rem;
  color: var(--primary);
}

#advantages p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ===== SOLUTIONS ===== */
#solutions article {
  margin-bottom: 24px;
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#solutions article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#solutions h3 {
  margin-bottom: 12px;
  color: var(--primary);
}

#solutions article:last-child {
  margin-bottom: 0;
}

/* ===== APPLICATIONS ===== */
#applications {
  padding: 48px 0;
}

#applications p {
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(192, 57, 43, 0.06), rgba(211, 84, 0, 0.06));
  border: 1px solid var(--card-border);
  font-size: 0.95rem;
  line-height: 1.9;
  margin-bottom: 0;
}

/* ===== CASES ===== */
#cases article {
  margin-bottom: 24px;
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#cases article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#cases h3 {
  margin-bottom: 12px;
  color: var(--primary);
}

#cases article:last-child {
  margin-bottom: 0;
}

/* ===== TESTIMONIALS ===== */
#testimonials blockquote {
  margin-bottom: 20px;
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#testimonials blockquote::before {
  content: "\201C";
  position: absolute;
  top: 12px;
  left: 20px;
  font-size: 3.5rem;
  font-family: Georgia, serif;
  color: var(--primary);
  opacity: 0.15;
  line-height: 1;
}

#testimonials blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#testimonials blockquote p {
  font-size: 0.95rem;
  font-style: italic;
  line-height: 1.85;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

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

#testimonials blockquote:last-child {
  margin-bottom: 0;
}

/* ===== NEWS ===== */
#news article {
  margin-bottom: 20px;
  padding: 24px 28px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#news article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#news h3 {
  margin-bottom: 8px;
}

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

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

#news time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  padding: 2px 12px;
  border-radius: var(--radius-full);
  background: rgba(192, 57, 43, 0.06);
}

#news article:last-child {
  margin-bottom: 0;
}

/* ===== ARTICLES ===== */
#articles article {
  margin-bottom: 24px;
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(192, 57, 43, 0.2);
}

#articles h3 {
  margin-bottom: 8px;
}

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

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

#articles time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  padding: 2px 12px;
  border-radius: var(--radius-full);
  background: rgba(192, 57, 43, 0.06);
}

#articles article > a:last-child {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

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

#articles article > a:last-child:hover {
  gap: 8px;
  color: var(--primary-light);
}

#articles article > a:last-child:hover::after {
  transform: translateX(3px);
}

#articles article:last-child {
  margin-bottom: 0;
}

/* ===== FAQ ===== */
#faq details {
  margin-bottom: 14px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

#faq details[open] {
  box-shadow: var(--shadow-md);
  border-color: rgba(192, 57, 43, 0.2);
}

#faq details:hover {
  border-color: rgba(192, 57, 43, 0.18);
}

#faq summary {
  padding: 20px 28px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: rgba(192, 57, 43, 0.08);
  color: var(--primary);
  font-size: 1.2rem;
  font-weight: 400;
  transition: transform var(--transition-base), background var(--transition-base);
}

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

#faq summary:hover {
  color: var(--primary);
  background: rgba(192, 57, 43, 0.03);
}

#faq details > div {
  padding: 0 28px 22px;
  animation: fadeIn 0.35s ease;
}

#faq details > div p {
  font-size: 0.92rem;
  line-height: 1.85;
  margin-bottom: 0;
}

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

#faq details:last-child {
  margin-bottom: 0;
}

/* ===== HOWTO ===== */
#howto article {
  margin-bottom: 28px;
  padding: 30px 32px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#howto article:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

#howto h3 {
  margin-bottom: 14px;
  color: var(--primary);
}

#howto ol {
  counter-reset: step;
}

#howto ol > li {
  counter-increment: step;
  margin-bottom: 22px;
  padding-left: 56px;
  position: relative;
}

#howto ol > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 2px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(192, 57, 43, 0.3);
}

#howto h4 {
  margin-bottom: 8px;
  color: var(--text);
}

#howto ul {
  padding-left: 0;
}

#howto ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

#howto ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  opacity: 0.7;
}

#howto article:last-child {
  margin-bottom: 0;
}

/* ===== NOTES ===== */
#notes ul {
  display: grid;
  gap: 12px;
}

#notes li {
  position: relative;
  padding: 16px 20px 16px 48px;
  border-radius: var(--radius-md);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#notes li::before {
  content: "\2713";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
}

#notes li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

/* ===== EXTENDED ===== */
#extended p {
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(192, 57, 43, 0.05), rgba(211, 84, 0, 0.05));
  border: 1px solid var(--card-border);
  font-size: 0.95rem;
  line-height: 1.9;
  margin-bottom: 0;
}

/* ===== CONTACT ===== */
#contact address {
  font-style: normal;
  margin-bottom: 32px;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
}

#contact address h3 {
  margin-bottom: 20px;
  color: var(--primary);
}

#contact dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px 24px;
}

#contact dt {
  font-weight: 600;
  color: var(--text);
  font-size: 0.92rem;
}

#contact dd {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

#contact dd a {
  font-weight: 500;
}

#contact article {
  margin-bottom: 20px;
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#contact article:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

#contact article h3 {
  margin-bottom: 12px;
  color: var(--primary);
}

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

/* ===== SITEMAP ===== */
#sitemap nav ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}

#sitemap nav > ul > li {
  padding: 8px 0;
}

#sitemap nav > ul > li > a {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--primary);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

#sitemap nav > ul > li > a:hover {
  padding-left: 6px;
  color: var(--primary-light);
}

#sitemap nav ul ul {
  margin-top: 6px;
  padding-left: 14px;
  border-left: 2px solid var(--card-border);
}

#sitemap nav ul ul li {
  padding: 3px 0;
}

#sitemap nav ul ul a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

#sitemap nav ul ul a:hover {
  color: var(--primary);
  padding-left: 4px;
}

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

#links li a {
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

#links li a:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  color: var(--primary);
  border-color: rgba(192, 57, 43, 0.25);
}

/* ===== FOOTER ===== */
#site-footer {
  margin-top: 40px;
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
  border-top: 1px solid var(--card-border);
  padding: 64px 24px 0;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1.5fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-about h3,
.footer-contact h3,
.footer-links h3 {
  font-size: 1.05rem;
  margin-bottom: 16px;
  color: var(--primary);
  position: relative;
  padding-bottom: 10px;
}

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

.footer-about p,
.footer-contact p {
  font-size: 0.88rem;
  line-height: 1.8;
  margin-bottom: 8px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 6px;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 0;
  border-top: 1px solid var(--card-border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom p {
  margin-bottom: 0;
  font-size: 0.82rem;
}

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

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

#site-footer > section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 0;
  border-top: 1px solid var(--card-border);
}

#site-footer > section h3 {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

#site-footer > section p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 0;
}

#site-footer > section:last-child {
  padding-bottom: 40px;
}

/* ===== BACK TO TOP ===== */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 24px rgba(192, 57, 43, 0.4);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-base);
  animation: fadeInUp 0.4s ease;
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 10px 32px rgba(192, 57, 43, 0.55);
}

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

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 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.visible {
  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: 1024px) {
  #advantages ul {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .footer-about {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  section {
    padding: 48px 0;
  }

  #main-content {
    padding: 0 16px;
  }

  #main-nav {
    padding: 0 16px;
  }

  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-top: 1px solid var(--glass-border);
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    z-index: 999;
    overflow-y: auto;
  }

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

  .nav-links li a {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    border-bottom: 1px solid var(--card-border);
  }

  .nav-links li a::after {
    display: none;
  }

  #mobile-menu-toggle {
    display: flex;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .stat-item {
    padding: 24px 12px;
  }

  .hero-slider {
    min-height: 420px;
  }

  .slide-caption {
    padding: 32px 24px 48px;
  }

  .slide-caption h1 {
    font-size: 1.4rem;
  }

  .slide-caption p {
    font-size: 0.88rem;
  }

  .cta-btn {
    padding: 11px 26px;
    font-size: 0.88rem;
  }

  .slider-prev,
  .slider-next {
    width: 38px;
    height: 38px;
    font-size: 0.9rem;
  }

  .slider-prev { left: 10px; }
  .slider-next { right: 10px; }

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

  #about article,
  #services article,
  #solutions article,
  #cases article,
  #testimonials blockquote,
  #news article,
  #articles article,
  #howto article,
  #contact article {
    padding: 22px 20px;
  }

  #faq summary {
    padding: 16px 20px;
    font-size: 0.92rem;
  }

  #faq details > div {
    padding: 0 20px 18px;
  }

  #contact dl {
    grid-template-columns: 1fr;
    gap: 4px 0;
  }

  #contact dt {
    margin-top: 10px;
  }

  #contact dt:first-child {
    margin-top: 0;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

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

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

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .stat-item {
    padding: 20px 8px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .stat-label {
    font-size: 0.78rem;
  }

  .hero-slider {
    min-height: 380px;
  }

  .slide-caption {
    padding: 24px 18px 40px;
  }

  .slide-caption h1 {
    font-size: 1.2rem;
  }

  .slide-caption p {
    font-size: 0.82rem;
    line-height: 1.7;
  }

  section > h2 {
    font-size: 1.25rem;
  }

  #howto ol > li {
    padding-left: 46px;
  }

  #howto ol > li::before {
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
  }

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

  #links ul {
    flex-direction: column;
  }

  #links li a {
    width: 100%;
    text-align: center;
  }
}

/* ===== ACCESSIBILITY ===== */
@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;
  }
}

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

::selection {
  background: rgba(192, 57, 43, 0.2);
  color: var(--text);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: 4px;
}

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

/* ===== PRINT ===== */
@media print {
  #site-header,
  #back-to-top,
  .slider-prev,
  .slider-next,
  .slider-dots {
    display: none !important;
  }

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

  section {
    padding: 20px 0;
    break-inside: avoid;
  }
}