:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --primary-lighter: #3a7abf;
  --accent: #4a9eff;
  --accent-secondary: #ff6b9d;
  --accent-tertiary: #ffd93d;
  --bg-body: #f0f4f8;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.35);
  --bg-header: rgba(255, 255, 255, 0.82);
  --bg-footer: #1a2a3a;
  --text-primary: #1a2a3a;
  --text-secondary: #4a5a6a;
  --text-muted: #7a8a9a;
  --text-inverse: #ffffff;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 24px rgba(74, 158, 255, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-fast: 0.18s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-banner-1: linear-gradient(135deg, #0f2440 0%, #1a3a5c 30%, #2a5a8c 65%, #3a7abf 100%);
  --gradient-banner-2: linear-gradient(135deg, #1a2a4a 0%, #2a4a6a 40%, #3a6a9a 75%, #4a8aca 100%);
  --gradient-banner-3: linear-gradient(135deg, #0e2035 0%, #1e3d5c 35%, #2e5d8c 70%, #4a8ac0 100%);
  --gradient-accent: linear-gradient(135deg, #4a9eff 0%, #ff6b9d 100%);
  --gradient-btn: linear-gradient(135deg, #2a5a8c 0%, #3a7abf 100%);
  --gradient-btn-hover: linear-gradient(135deg, #3a7abf 0%, #4a9eff 100%);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  --header-height: 68px;
  --max-width: 1200px;
  --content-padding: clamp(16px, 4vw, 40px);
}

[data-theme="dark"] {
  --primary: #4a9eff;
  --primary-light: #6ab0ff;
  --primary-lighter: #8ac4ff;
  --accent: #6ab0ff;
  --accent-secondary: #ff8db5;
  --accent-tertiary: #ffe066;
  --bg-body: #0d1520;
  --bg-card: #162030;
  --bg-card-hover: #1c2a3d;
  --bg-glass: rgba(22, 32, 48, 0.78);
  --bg-glass-border: rgba(74, 158, 255, 0.15);
  --bg-header: rgba(13, 21, 32, 0.88);
  --bg-footer: #0a1018;
  --text-primary: #e2e8f0;
  --text-secondary: #a0b0c0;
  --text-muted: #6a7a8a;
  --text-inverse: #0d1520;
  --border-color: #2a3a4a;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 24px rgba(74, 158, 255, 0.15);
  --gradient-banner-1: linear-gradient(135deg, #0a1525 0%, #122840 30%, #1a3a5c 65%, #2a5a8c 100%);
  --gradient-banner-2: linear-gradient(135deg, #0d1a2a 0%, #1a2a4a 40%, #2a4a6a 75%, #3a6a9a 100%);
  --gradient-banner-3: linear-gradient(135deg, #081220 0%, #142a42 35%, #1e3d5c 70%, #2e5d8c 100%);
  --gradient-btn: linear-gradient(135deg, #2a5a8c 0%, #4a9eff 100%);
  --gradient-btn-hover: linear-gradient(135deg, #4a9eff 0%, #6ab0ff 100%);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

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

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

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

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

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

ul,
ol {
  list-style: none;
}

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

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

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--bg-header);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--bg-glass-border);
  transition: background var(--transition-slow), box-shadow var(--transition-base), border-color var(--transition-slow);
}

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--text-primary);
  transition: transform var(--transition-base);
}

.logo:hover {
  transform: scale(1.03);
  color: var(--text-primary);
}

.logo svg {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(26, 58, 92, 0.25);
  transition: box-shadow var(--transition-base);
}

.logo:hover svg {
  box-shadow: 0 4px 16px rgba(74, 158, 255, 0.35);
}

.logo-text {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

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

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

#main-nav a {
  display: block;
  padding: 6px 14px;
  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-fast), background var(--transition-fast);
}

#main-nav a::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transition: transform var(--transition-base);
}

#main-nav a:hover {
  color: var(--accent);
  background: rgba(74, 158, 255, 0.08);
}

#main-nav a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

#search-form {
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

#search-form:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.15), var(--shadow-glow);
}

#search-input {
  width: 180px;
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
  transition: width var(--transition-base);
}

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

#search-input:focus {
  width: 220px;
}

#search-form button {
  padding: 8px 16px;
  background: var(--gradient-btn);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 0 50px 50px 0;
  transition: background var(--transition-base), transform var(--transition-fast);
  white-space: nowrap;
}

#search-form button:hover {
  background: var(--gradient-btn-hover);
  transform: scale(1.02);
}

#theme-toggle {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1.1rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition-base), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#theme-toggle:hover {
  transform: rotate(20deg) scale(1.1);
  background: rgba(74, 158, 255, 0.12);
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

#menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
  color: var(--text-primary);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

#menu-toggle:hover {
  background: rgba(74, 158, 255, 0.12);
  transform: scale(1.05);
}

#main-content {
  padding-top: var(--header-height);
}

#banner {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.banner-slider {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 1;
  min-height: 240px;
  max-height: 520px;
}

.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.06);
  transition: opacity 0.8s ease, transform 0.8s ease;
  pointer-events: none;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  overflow: hidden;
}

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

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

.banner-slide:nth-child(1) {
  background: var(--gradient-banner-1);
}

.banner-slide:nth-child(2) {
  background: var(--gradient-banner-2);
}

.banner-slide:nth-child(3) {
  background: var(--gradient-banner-3);
}

.banner-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.15) 100%);
  pointer-events: none;
  border-radius: inherit;
}

.banner-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 50px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.banner-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  cursor: pointer;
  transition: background var(--transition-base), transform var(--transition-base), width var(--transition-base);
}

.banner-dots .dot.active {
  background: #fff;
  width: 28px;
  border-radius: 5px;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.5);
}

.banner-dots .dot:hover {
  background: rgba(255, 255, 255, 0.75);
  transform: scale(1.15);
}

#breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px var(--content-padding) 0;
}

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

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

#breadcrumb li:not(:last-child)::after {
  content: "›";
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1;
}

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

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

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

section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px var(--content-padding);
}

section h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: var(--text-primary);
  position: relative;
  padding-left: 18px;
}

section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2em;
  bottom: 0.2em;
  width: 5px;
  background: var(--gradient-accent);
  border-radius: 3px;
}

section h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  font-weight: 700;
  line-height: 1.4;
  margin: 28px 0 12px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

section p {
  margin-bottom: 14px;
  color: var(--text-secondary);
  line-height: 1.85;
}

section .lead {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-secondary);
  padding: 20px 24px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--accent);
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
}

section ul,
section ol {
  margin: 12px 0 20px;
  padding-left: 0;
}

section ul li,
section ol li {
  position: relative;
  padding: 8px 0 8px 28px;
  color: var(--text-secondary);
  line-height: 1.8;
  transition: color var(--transition-fast);
}

section ul li:hover,
section ol li:hover {
  color: var(--text-primary);
}

section ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 8px rgba(74, 158, 255, 0.4);
  transition: transform var(--transition-fast);
}

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

section ol {
  counter-reset: item;
}

section ol li {
  counter-increment: item;
}

section ol li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 12px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-btn);
  border-radius: 50%;
  line-height: 1;
}

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

#brand,
#products,
#solutions,
#industry,
#cases,
#news,
#articles,
#howto,
#faq,
#contact,
#sitemap,
#links {
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.news-item,
.article-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

.news-item:hover,
.article-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.news-item:hover::before,
.article-item:hover::before {
  transform: scaleX(1);
}

.news-item h3,
.article-item h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
}

.news-item h3 a,
.article-item h3 a {
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.news-item h3 a:hover,
.article-item h3 a:hover {
  color: var(--accent);
}

.news-item .meta,
.article-item .meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-item .meta::before,
.article-item .meta::before {
  content: "🕐";
  font-size: 0.75rem;
}

.article-item .summary {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.read-more::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.read-more:hover {
  gap: 8px;
  color: var(--primary-light);
}

.read-more:hover::after {
  transform: translateX(3px);
}

blockquote {
  position: relative;
  padding: 20px 24px 20px 56px;
  margin: 16px 0;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

blockquote::before {
  content: """;
  position: absolute;
  left: 16px;
  top: 8px;
  font-size: 3rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.35;
  font-family: Georgia, serif;
}

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

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

#faq details {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}

#faq details:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

#faq details[open] {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  background: var(--bg-card-hover);
}

#faq summary {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  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: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--accent);
  background: rgba(74, 158, 255, 0.1);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}

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

#faq summary:hover {
  color: var(--accent);
  background: rgba(74, 158, 255, 0.04);
}

#faq details p {
  padding: 0 24px 20px;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--text-secondary);
  animation: fadeSlideIn 0.35s ease;
}

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

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

#contact ul li {
  padding: 10px 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

#contact ul li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
  border-color: var(--accent);
}

#sitemap ul {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

#sitemap ul li {
  padding: 0;
}

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

#sitemap a {
  display: block;
  padding: 12px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), color var(--transition-base), background var(--transition-base);
}

#sitemap a:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-card-hover);
}

#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#links ul li {
  padding: 0;
}

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

#links a {
  display: inline-block;
  padding: 8px 20px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), color var(--transition-base), background var(--transition-base);
}

#links a:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(74, 158, 255, 0.08);
}

#site-footer {
  background: var(--bg-footer);
  color: rgba(255, 255, 255, 0.8);
  margin-top: 40px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  overflow: hidden;
  position: relative;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px var(--content-padding) 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
}

.footer-col h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.footer-col p {
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul li {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
}

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  position: relative;
}

.footer-col ul li a::before {
  content: "›";
  position: absolute;
  left: -14px;
  opacity: 0;
  transition: opacity var(--transition-fast), left var(--transition-fast);
  color: var(--accent);
}

.footer-col ul li a:hover {
  color: var(--accent);
  padding-left: 6px;
}

.footer-col ul li a:hover::before {
  opacity: 1;
  left: -8px;
}

#site-footer section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

#site-footer section h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 8px;
  margin-top: 16px;
}

#site-footer section p {
  font-size: 0.8rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 8px;
}

#site-footer #copyright {
  padding-bottom: 16px;
}

#site-footer #copyright p:last-child {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.8rem;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 8px;
}

.footer-meta {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px var(--content-padding);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.35);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  line-height: 1.7;
}

#back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 900;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-btn);
  border-radius: 50%;
  box-shadow: var(--shadow-md), 0 0 20px rgba(74, 158, 255, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.9);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

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

#back-to-top:hover {
  background: var(--gradient-btn-hover);
  box-shadow: var(--shadow-lg), 0 0 32px rgba(74, 158, 255, 0.45);
  transform: translateY(-4px) scale(1.08);
}

#back-to-top:active {
  transform: translateY(-2px) scale(1);
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(74, 158, 255, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(74, 158, 255, 0); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@media (max-width: 1024px) {
  #main-nav a {
    padding: 6px 10px;
    font-size: 0.82rem;
  }

  #search-input {
    width: 140px;
  }

  #search-input:focus {
    width: 170px;
  }
}

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

  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-header);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--bg-glass-border);
    padding: 12px var(--content-padding) 20px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  }

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

  #main-nav ul {
    flex-direction: column;
    gap: 2px;
    width: 100%;
  }

  #main-nav a {
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    width: 100%;
    text-align: left;
  }

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

  #menu-toggle {
    display: flex;
  }

  #search-form {
    display: none;
  }

  .banner-slider {
    aspect-ratio: 2 / 1;
    min-height: 200px;
  }

  section {
    padding: 36px var(--content-padding);
  }

  section h2 {
    font-size: 1.35rem;
  }

  .news-item,
  .article-item {
    padding: 20px 22px;
  }

  #sitemap ul {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

  .footer-inner {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
    padding: 36px var(--content-padding) 24px;
  }

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

@media (max-width: 520px) {
  :root {
    --header-height: 56px;
  }

  body {
    font-size: 15px;
  }

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

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

  .banner-slider {
    aspect-ratio: 1.6 / 1;
    min-height: 180px;
  }

  .banner-dots {
    bottom: 12px;
    padding: 6px 12px;
    gap: 8px;
  }

  .banner-dots .dot {
    width: 8px;
    height: 8px;
  }

  .banner-dots .dot.active {
    width: 22px;
  }

  section {
    padding: 28px var(--content-padding);
  }

  section h2 {
    font-size: 1.2rem;
    padding-left: 14px;
  }

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

  section h3 {
    font-size: 1.05rem;
  }

  section .lead {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .news-item,
  .article-item {
    padding: 16px 18px;
    border-radius: var(--radius-sm);
  }

  .news-item h3,
  .article-item h3 {
    font-size: 1rem;
  }

  #faq summary {
    padding: 14px 18px;
    font-size: 0.9rem;
  }

  #faq details p {
    padding: 0 18px 16px;
    font-size: 0.85rem;
  }

  #sitemap ul {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  #sitemap a {
    padding: 10px 14px;
    font-size: 0.82rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 28px var(--content-padding) 20px;
  }

  .footer-col h3 {
    font-size: 0.92rem;
  }

  .footer-meta {
    font-size: 0.7rem;
    padding: 16px var(--content-padding);
  }

  blockquote {
    padding: 16px 18px 16px 44px;
  }

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

  #back-to-top {
    bottom: 16px;
    right: 16px;
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }
}

@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,
  .banner-dots,
  #main-nav {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 12pt;
  }

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

  section {
    padding: 16px 0;
    max-width: 100%;
  }
}