:root {
  --primary: #1a73e8;
  --primary-dark: #0d47a1;
  --primary-light: #4a9eff;
  --secondary: #7c3aed;
  --accent: #f59e0b;
  --bg: #f5f7fb;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.45);
  --text: #1f2937;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-hover: 0 16px 48px rgba(26, 115, 232, 0.18);
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 68px;
  --max-width: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --primary: #4a9eff;
  --primary-dark: #1a73e8;
  --primary-light: #7bb8ff;
  --secondary: #a78bfa;
  --accent: #fbbf24;
  --bg: #0b1120;
  --bg-card: #151d2e;
  --bg-glass: rgba(21, 29, 46, 0.78);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --text: #e5e7eb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --border: #2a3447;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 16px 48px rgba(74, 158, 255, 0.22);
}

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

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 15% 20%, rgba(26, 115, 232, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 85% 80%, rgba(124, 58, 237, 0.07) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(245, 158, 11, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

[data-theme="dark"] body::before {
  background:
    radial-gradient(circle at 15% 20%, rgba(74, 158, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 85% 80%, rgba(167, 139, 250, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(251, 191, 36, 0.04) 0%, transparent 60%);
}

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

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text);
  scroll-margin-top: calc(var(--header-height) + 20px);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.65rem; }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.1rem; }

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

strong {
  color: var(--text);
  font-weight: 600;
}

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

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

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 10px;
  border: 2px solid var(--bg);
}

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

#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--bg-glass-border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.logo:hover {
  transform: scale(1.04);
}

.logo svg {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  transition: transform var(--transition);
}

.logo:hover svg {
  transform: rotate(-6deg) scale(1.06);
}

.logo-text {
  font-size: 1.3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

#main-nav {
  flex: 1;
  min-width: 0;
}

#main-nav ul {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

#main-nav ul::-webkit-scrollbar {
  display: none;
}

#main-nav a {
  display: block;
  padding: 8px 12px;
  font-size: 0.875rem;
  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(--secondary));
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition);
}

#main-nav a:hover {
  color: var(--primary);
  background: rgba(26, 115, 232, 0.08);
}

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

#mobile-menu-toggle {
  display: none;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

#mobile-menu-toggle:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

#dark-mode-toggle {
  padding: 8px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all var(--transition);
}

#dark-mode-toggle:hover {
  color: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.12);
  transform: translateY(-1px);
}

#site-search {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  border-radius: 100px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all var(--transition);
}

#site-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.14);
}

#site-search input {
  width: 160px;
  padding: 8px 14px;
  font-size: 0.85rem;
  font-family: inherit;
  color: var(--text);
  background: transparent;
  border: none;
  outline: none;
  transition: width var(--transition);
}

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

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

#site-search button {
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity var(--transition);
}

#site-search button:hover {
  opacity: 0.88;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 60px;
}

#banner {
  position: relative;
  margin: 24px 0 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

.banner-slide {
  position: absolute;
  inset: 0;
  padding: 48px 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  transform: translateX(40px) scale(0.98);
  pointer-events: none;
  transition: opacity 0.7s ease, transform 0.7s ease;
  background: linear-gradient(135deg, #1a73e8 0%, #7c3aed 55%, #f59e0b 120%);
}

.banner-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.25) 0%, transparent 45%),
    radial-gradient(circle at 10% 90%, rgba(255, 255, 255, 0.12) 0%, transparent 40%);
  pointer-events: none;
}

.banner-slide[data-slide="2"] {
  background: linear-gradient(135deg, #0d47a1 0%, #1a73e8 50%, #4a9eff 100%);
}

.banner-slide[data-slide="3"] {
  background: linear-gradient(135deg, #6d28d9 0%, #7c3aed 50%, #a78bfa 100%);
}

.banner-slide.active {
  opacity: 1;
  transform: translateX(0) scale(1);
  pointer-events: auto;
}

.banner-slide h2 {
  position: relative;
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
}

.banner-slide p {
  position: relative;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.92);
  max-width: 620px;
  margin-bottom: 24px;
  line-height: 1.7;
}

.banner-slide a {
  position: relative;
  align-self: flex-start;
  padding: 12px 32px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary-dark);
  background: rgba(255, 255, 255, 0.95);
  border-radius: 100px;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.banner-slide a:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.28);
  background: #fff;
  color: var(--primary-dark);
}

#banner::after {
  content: "";
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.35);
  z-index: 5;
}

#breadcrumb {
  margin-bottom: 20px;
  font-size: 0.85rem;
}

#breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#breadcrumb li {
  color: var(--text-muted);
}

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

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

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

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

section {
  margin-bottom: 36px;
  padding: 32px 30px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}

section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}

section:hover::before {
  opacity: 1;
}

section:hover {
  box-shadow: var(--shadow);
  border-color: rgba(26, 115, 232, 0.2);
}

section > h2 {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 22px;
  font-size: 1.55rem;
}

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

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

section h3 {
  margin: 22px 0 10px;
  color: var(--primary);
}

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

section h4 {
  margin: 16px 0 8px;
  color: var(--text);
}

section ul,
section ol {
  margin: 12px 0;
  padding-left: 4px;
}

section ul li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 8px;
  color: var(--text-secondary);
  transition: transform var(--transition), color var(--transition);
}

section ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.7em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.12);
  transition: transform var(--transition), box-shadow var(--transition);
}

section ul li:hover {
  transform: translateX(4px);
  color: var(--text);
}

section ul li:hover::before {
  transform: scale(1.3);
  box-shadow: 0 0 0 5px rgba(26, 115, 232, 0.18);
}

section ol {
  counter-reset: item;
}

section ol li {
  position: relative;
  padding-left: 40px;
  margin-bottom: 12px;
  color: var(--text-secondary);
  counter-increment: item;
  transition: transform var(--transition), color var(--transition);
}

section ol li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 2px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(26, 115, 232, 0.28);
}

section ol li:hover {
  transform: translateX(4px);
  color: var(--text);
}

#hero-intro {
  background: linear-gradient(135deg, rgba(26, 115, 232, 0.06), rgba(124, 58, 237, 0.06));
  border-color: rgba(26, 115, 232, 0.18);
}

#hero-intro h1 {
  font-size: 1.9rem;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] #hero-intro h1 {
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

#hero-intro p {
  font-size: 1rem;
  line-height: 1.85;
}

#hero-intro ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 20px;
}

#hero-intro ul li {
  padding: 14px 18px 14px 40px;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#hero-intro ul li::before {
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
}

#hero-intro ul li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(26, 115, 232, 0.3);
}

#hero-intro ul li:hover::before {
  transform: translateY(-50%) scale(1.3);
}

#products ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 10px;
}

#products ul li {
  padding: 12px 16px 12px 38px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

#products ul li::before {
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
}

#products ul li:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow);
  background: var(--bg-card);
}

#products ul li:hover::before {
  transform: translateY(-50%) scale(1.3);
}

#solutions h3 {
  padding: 12px 0 0;
  border-top: 1px dashed var(--border);
}

#solutions h3:first-of-type {
  border-top: none;
  padding-top: 0;
}

#cases h3,
#news article {
  padding: 18px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#cases h3 {
  margin-top: 0;
  color: var(--text);
  border-left: 4px solid var(--primary);
}

#cases h3:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
  background: var(--bg-card);
}

#news article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(26, 115, 232, 0.3);
  background: var(--bg-card);
}

#news article h3 {
  margin-top: 0;
  color: var(--text);
  font-size: 1.15rem;
}

#news article p:first-of-type {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

#news article a {
  display: inline-block;
  margin-top: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(26, 115, 232, 0.1);
  transition: all var(--transition);
}

#news article a:hover {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  transform: translateX(4px);
  box-shadow: 0 6px 18px rgba(26, 115, 232, 0.3);
}

#testimonials blockquote {
  position: relative;
  padding: 22px 24px 22px 60px;
  margin-bottom: 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#testimonials blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 6px;
  font-size: 3.4rem;
  line-height: 1;
  font-family: Georgia, serif;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.6;
}

#testimonials blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(26, 115, 232, 0.3);
}

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

#articles article {
  padding: 20px 22px;
  margin-bottom: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

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

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

#articles article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(26, 115, 232, 0.3);
  background: var(--bg-card);
}

#articles article h3 {
  margin-top: 0;
  color: var(--text);
  font-size: 1.12rem;
}

#articles article p:first-of-type {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

#articles article a {
  display: inline-block;
  margin-top: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(26, 115, 232, 0.1);
  transition: all var(--transition);
}

#articles article a:hover {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  transform: translateX(4px);
  box-shadow: 0 6px 18px rgba(26, 115, 232, 0.3);
}

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

#faq details:hover {
  border-color: rgba(26, 115, 232, 0.3);
  box-shadow: var(--shadow);
}

#faq details[open] {
  border-color: rgba(26, 115, 232, 0.4);
  box-shadow: var(--shadow);
  background: var(--bg-card);
}

#faq summary {
  padding: 16px 20px;
  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), background var(--transition);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 400;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}

#faq details[open] summary::after {
  content: "\2212";
  transform: rotate(180deg);
}

#faq summary:hover {
  color: var(--primary);
  background: rgba(26, 115, 232, 0.05);
}

#faq details p {
  padding: 0 20px 18px;
  margin: 0;
  animation: fadeSlideIn 0.4s ease;
}

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

#howto ol li strong {
  color: var(--primary);
}

#howto ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 8px;
}

#howto ul li {
  padding: 10px 14px 10px 36px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

#howto ul li::before {
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
}

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

#howto ul li:hover::before {
  transform: translateY(-50%) scale(1.3);
}

#contact ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}

#contact ul li {
  padding: 14px 18px 14px 40px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

#contact ul li::before {
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
}

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

#contact ul li:hover::before {
  transform: translateY(-50%) scale(1.3);
}

#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}

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

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

#sitemap ul li a,
#links ul li a {
  display: block;
  padding: 10px 16px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(26, 115, 232, 0.3);
}

#legal {
  background: linear-gradient(135deg, rgba(26, 115, 232, 0.04), rgba(124, 58, 237, 0.04));
}

#legal h3 {
  font-size: 1.05rem;
  color: var(--text);
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  margin-top: 20px;
}

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

#site-footer {
  background: linear-gradient(135deg, #0d1b2a 0%, #1a2744 50%, #0d1b2a 100%);
  color: #9ca3af;
  padding: 44px 24px 32px;
  margin-top: 20px;
  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(--secondary), var(--accent));
}

#site-footer::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 115, 232, 0.15), transparent 70%);
  pointer-events: none;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

#site-footer p {
  margin-bottom: 8px;
  font-size: 0.88rem;
  color: #9ca3af;
}

#site-footer a {
  color: #cbd5e1;
  transition: color var(--transition), text-shadow var(--transition);
}

#site-footer a:hover {
  color: var(--primary-light);
  text-shadow: 0 0 12px rgba(74, 158, 255, 0.5);
}

#back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 900;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.85);
  box-shadow: 0 8px 24px rgba(26, 115, 232, 0.4);
  transition: all var(--transition);
}

#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 14px 36px rgba(26, 115, 232, 0.55);
}

#back-to-top:active {
  transform: translateY(-1px) scale(0.98);
}

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

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

@media (max-width: 1024px) {
  .header-inner {
    gap: 10px;
    padding: 0 16px;
  }

  #site-search input {
    width: 130px;
  }

  #site-search input:focus {
    width: 160px;
  }

  #main-nav a {
    padding: 8px 9px;
    font-size: 0.82rem;
  }

  .banner-slide {
    padding: 40px 32px;
  }

  .banner-slide h2 {
    font-size: 1.7rem;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 60px;
  }

  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 10px 16px;
    gap: 10px;
  }

  .logo {
    order: 1;
  }

  #dark-mode-toggle {
    order: 2;
    margin-left: auto;
  }

  #mobile-menu-toggle {
    display: block;
    order: 3;
  }

  #site-search {
    order: 4;
    width: 100%;
    border-radius: var(--radius-sm);
  }

  #site-search input {
    flex: 1;
    width: auto;
  }

  #site-search input:focus {
    width: auto;
  }

  #main-nav {
    order: 5;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
  }

  #main-nav.open {
    max-height: 500px;
    opacity: 1;
    padding-top: 6px;
  }

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

  #main-nav a {
    padding: 10px 14px;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
  }

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

  main {
    padding: 0 16px 40px;
  }

  section {
    padding: 24px 20px;
    border-radius: var(--radius);
  }

  #banner {
    min-height: 280px;
    border-radius: var(--radius);
  }

  .banner-slide {
    padding: 32px 24px;
  }

  .banner-slide h2 {
    font-size: 1.45rem;
  }

  .banner-slide p {
    font-size: 0.95rem;
  }

  .banner-slide a {
    padding: 10px 26px;
    font-size: 0.9rem;
  }

  #hero-intro h1 {
    font-size: 1.5rem;
  }

  section > h2 {
    font-size: 1.3rem;
  }

  section h3 {
    font-size: 1.1rem;
  }

  #hero-intro ul,
  #products ul,
  #howto ul,
  #contact ul {
    grid-template-columns: 1fr;
  }
}

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

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

  .logo svg {
    width: 34px;
    height: 34px;
  }

  #banner {
    min-height: 260px;
  }

  .banner-slide {
    padding: 26px 18px;
  }

  .banner-slide h2 {
    font-size: 1.25rem;
  }

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

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

  section {
    padding: 20px 16px;
  }

  section > h2 {
    font-size: 1.18rem;
  }

  #faq summary {
    padding: 14px 16px;
    font-size: 0.92rem;
  }

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

  #testimonials blockquote {
    padding: 18px 18px 18px 50px;
  }

  #testimonials blockquote::before {
    font-size: 2.8rem;
    left: 14px;
  }

  #back-to-top {
    width: 42px;
    height: 42px;
    bottom: 18px;
    right: 18px;
    font-size: 0.66rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: repeat(2, 1fr);
  }
}

@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;
  }
}

@media print {
  #site-header,
  #back-to-top,
  #banner {
    display: none;
  }

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

  section {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
}