:root {
  --primary: #e94560;
  --primary-dark: #c73650;
  --primary-light: #ff6b81;
  --accent: #f9a826;
  --accent-light: #ffc857;
  --bg: #f8f9fc;
  --bg-alt: #ffffff;
  --bg-elevated: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8888a8;
  --border: rgba(26, 26, 46, 0.08);
  --border-strong: rgba(26, 26, 46, 0.15);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.1);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.14);
  --shadow-glow: 0 8px 32px rgba(233, 69, 96, 0.25);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-blur: 16px;
  --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);
  --header-height: 72px;
  --max-width: 1200px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --primary: #ff6b81;
  --primary-dark: #e94560;
  --primary-light: #ff8fa3;
  --accent: #ffc857;
  --accent-light: #ffd97d;
  --bg: #0f0f1a;
  --bg-alt: #1a1a2e;
  --bg-elevated: #22223a;
  --text: #f0f0f8;
  --text-secondary: #c0c0d8;
  --text-muted: #8888a8;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 8px 32px rgba(255, 107, 129, 0.3);
  --glass-bg: rgba(26, 26, 46, 0.72);
  --glass-border: rgba(255, 255, 255, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #ff6b81;
    --primary-dark: #e94560;
    --primary-light: #ff8fa3;
    --accent: #ffc857;
    --accent-light: #ffd97d;
    --bg: #0f0f1a;
    --bg-alt: #1a1a2e;
    --bg-elevated: #22223a;
    --text: #f0f0f8;
    --text-secondary: #c0c0d8;
    --text-muted: #8888a8;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.16);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 8px 32px rgba(255, 107, 129, 0.3);
    --glass-bg: rgba(26, 26, 46, 0.72);
    --glass-border: rgba(255, 255, 255, 0.1);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  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-dark);
  opacity: 0.85;
}

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.125rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }

p {
  margin-bottom: 1em;
  color: var(--text-secondary);
}

p:last-child {
  margin-bottom: 0;
}

blockquote {
  margin: 1.25em 0;
  padding: 1.25em 1.5em;
  background: var(--bg-alt);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  box-shadow: var(--shadow-sm);
  font-style: italic;
  color: var(--text-secondary);
}

blockquote p {
  margin-bottom: 0;
}

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

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

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

::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 5px;
  border: 2px solid var(--bg);
}

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

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

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.03);
  color: var(--text);
  opacity: 1;
}

.logo svg {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.logo:hover svg {
  box-shadow: var(--shadow-glow);
  transform: rotate(-4deg);
}

.logo-text {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

#main-nav {
  margin-left: auto;
}

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

#main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

#main-nav 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);
}

#main-nav a:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.08);
  opacity: 1;
}

#main-nav a:hover::after {
  width: calc(100% - 28px);
}

#menu-toggle,
#theme-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text);
  font-size: 1.125rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

#theme-toggle {
  display: flex;
  margin-left: 8px;
}

#menu-toggle:hover,
#theme-toggle:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

#menu-toggle:active,
#theme-toggle:active {
  transform: translateY(0) scale(0.96);
}

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

.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 72px 24px;
  scroll-margin-top: calc(var(--header-height) + 16px);
}

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

.section > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 64px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
}

.section > h3 {
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--text);
}

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

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

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

.section ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 18px;
  width: 8px;
  height: 8px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.12);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.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(233, 69, 96, 0.18);
}

.section ol {
  counter-reset: item;
  margin: 16px 0;
  padding-left: 0;
}

.section ol li {
  counter-increment: item;
  position: relative;
  padding: 10px 0 10px 44px;
  color: var(--text-secondary);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.section ol li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 10px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(233, 69, 96, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.section ol li:hover::before {
  transform: scale(1.1);
  box-shadow: 0 4px 16px rgba(233, 69, 96, 0.45);
}

.banner {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  padding: 0;
  max-width: 100%;
}

.banner::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.3) 0%, transparent 70%);
  animation: bannerFloat 12s ease-in-out infinite;
  pointer-events: none;
}

.banner::after {
  content: "";
  position: absolute;
  bottom: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(249, 168, 38, 0.25) 0%, transparent 70%);
  animation: bannerFloat 15s ease-in-out infinite reverse;
  pointer-events: none;
}

@keyframes bannerFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(5%, 5%) scale(1.1); }
}

.banner-slide {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.85;
}

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

.banner-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 100px 24px 90px;
  text-align: center;
  color: #fff;
}

.banner-content h1 {
  color: #fff;
  font-size: clamp(1.875rem, 5vw, 3.25rem);
  font-weight: 800;
  margin-bottom: 20px;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
  background: linear-gradient(135deg, #ffffff 0%, #ffd97d 50%, #ff6b81 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.banner-content p {
  max-width: 720px;
  margin: 0 auto 32px;
  font-size: clamp(1rem, 2vw, 1.1875rem);
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.8;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.15s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border: none;
  border-radius: 50px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s both;
}

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

.btn-primary:hover {
  color: #fff;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 40px rgba(233, 69, 96, 0.45);
  opacity: 1;
}

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

.btn-primary:active {
  transform: translateY(-1px) scale(0.99);
}

#breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 24px 0;
}

#breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
}

#breadcrumb li {
  display: flex;
  align-items: center;
  color: var(--text-muted);
}

#breadcrumb li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--text-muted);
  font-size: 1.125rem;
}

#breadcrumb a {
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

#breadcrumb a:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.08);
  opacity: 1;
}

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

.news-item,
.article-item {
  position: relative;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  overflow: hidden;
}

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

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

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

.news-item h3,
.article-item h3 {
  margin-bottom: 8px;
  transition: color var(--transition-fast);
}

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

.news-item .meta,
.article-item .meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.news-item .meta::before,
.article-item .meta::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.article-item a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.article-item a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.article-item a:hover {
  gap: 10px;
  color: var(--primary-dark);
  opacity: 1;
}

.article-item a:hover::after {
  transform: translateX(3px);
}

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

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

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

#faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

#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;
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--primary);
  background: rgba(233, 69, 96, 0.1);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}

#faq details[open] summary {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.04);
}

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

#faq details p {
  padding: 0 24px 20px;
  margin: 0;
  animation: faqSlide 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

#contact p {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
  margin-bottom: 0;
  transition: padding-left var(--transition-fast), color var(--transition-fast);
}

#contact p:hover {
  padding-left: 8px;
  color: var(--text);
}

#contact p:last-of-type {
  border-bottom: none;
}

#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
  margin-top: 16px;
}

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

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

#sitemap a,
#links a {
  display: block;
  padding: 12px 18px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

#sitemap a:hover,
#links a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
  opacity: 1;
}

#site-footer {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: rgba(255, 255, 255, 0.75);
  padding: 48px 24px 32px;
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

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

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

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-inner p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  margin-bottom: 12px;
}

.footer-inner a {
  color: rgba(255, 255, 255, 0.85);
  padding: 2px 6px;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.footer-inner a:hover {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
  opacity: 1;
}

#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 900;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

#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 12px 40px rgba(233, 69, 96, 0.5);
}

#back-to-top:active {
  transform: translateY(-2px) scale(1.02);
}

.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);
  will-change: opacity, transform;
}

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

.section {
  animation: sectionFade 0.6s ease both;
}

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

@media (max-width: 1024px) {
  #main-nav ul {
    gap: 0;
  }

  #main-nav a {
    padding: 8px 10px;
    font-size: 0.875rem;
  }
}

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

  .header-inner {
    padding: 0 16px;
    gap: 8px;
  }

  .logo-text {
    font-size: 1.0625rem;
  }

  .logo svg {
    width: 36px;
    height: 36px;
  }

  #menu-toggle {
    display: flex;
    margin-left: auto;
  }

  #theme-toggle {
    margin-left: 0;
  }

  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    margin-left: 0;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition-slow);
  }

  #main-nav.open {
    max-height: 80vh;
    overflow-y: auto;
    padding: 12px 0;
  }

  #main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 16px;
  }

  #main-nav a {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

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

  .banner-content {
    padding: 72px 20px 64px;
  }

  .section {
    padding: 48px 16px;
  }

  .section > h2 {
    margin-bottom: 24px;
  }

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

  #faq summary {
    padding: 16px 18px;
    font-size: 0.9375rem;
  }

  #faq details p {
    padding: 0 18px 18px;
  }

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

  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }

  #site-footer {
    padding: 36px 16px 24px;
  }
}

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

  .banner-content {
    padding: 56px 16px 48px;
  }

  .btn-primary {
    padding: 12px 28px;
    font-size: 0.9375rem;
  }

  .section {
    padding: 40px 14px;
  }

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

  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  #sitemap a,
  #links a {
    padding: 10px 8px;
    font-size: 0.875rem;
  }
}

@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,
  #menu-toggle,
  #theme-toggle,
  #main-nav {
    display: none !important;
  }

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

  .section {
    padding: 16px 0;
    page-break-inside: avoid;
  }

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