:root {
  --primary: #c0392b;
  --primary-light: #e74c3c;
  --primary-dark: #962d22;
  --accent: #e67e22;
  --accent-soft: #f39c12;
  --teal: #3b6b6e;
  --teal-light: #5a9ea3;
  --bg: #faf9f6;
  --bg-alt: #f0ede8;
  --bg-card: #ffffff;
  --bg-hero-start: #faf7f2;
  --bg-hero-end: #eae5dd;
  --text: #1e2b2f;
  --text-secondary: #2f3e42;
  --text-muted: #5e6b6f;
  --text-light: #8a9a9e;
  --border: #e9e5dd;
  --border-light: #f0ede8;
  --shadow-sm: 0 2px 20px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.06);
  --shadow-primary: 0 8px 20px rgba(192, 57, 43, 0.3);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans SC', sans-serif;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-blur: blur(16px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121a1c;
    --bg-alt: #1a2528;
    --bg-card: #1e2b2f;
    --bg-hero-start: #1a2528;
    --bg-hero-end: #1e2b2f;
    --text: #e4edef;
    --text-secondary: #b8cbcf;
    --text-muted: #8a9a9e;
    --text-light: #6b7c80;
    --border: #2a3a3e;
    --border-light: #243438;
    --shadow-sm: 0 2px 20px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.35);
    --glass-bg: rgba(30, 43, 47, 0.78);
    --glass-border: rgba(255, 255, 255, 0.06);
  }
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  flex-wrap: wrap;
  gap: 8px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: transform var(--transition-fast);
}

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

.logo svg {
  width: 36px;
  height: 36px;
  transition: transform var(--transition-base);
}

.logo:hover svg {
  transform: rotate(-10deg) scale(1.08);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-links a {
  text-decoration: none;
  color: inherit;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}

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

.nav-links a:hover {
  color: var(--primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-alt);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  border: 1px solid transparent;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.12);
  background: var(--bg-card);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 6px 8px;
  outline: none;
  font-size: 0.9rem;
  width: 160px;
  color: var(--text);
  font-family: inherit;
}

.search-box input::placeholder {
  color: var(--text-light);
}

.search-box button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  border-radius: 50%;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.search-box button:hover {
  color: var(--primary);
  transform: scale(1.12);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--text);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--bg-alt);
}

.breadcrumb {
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--text-light);
}

.breadcrumb a {
  color: var(--teal);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

main {
  padding: 24px 0 60px;
}

section {
  margin-bottom: 56px;
  animation: fadeInUp 0.7s ease both;
}

section:nth-child(2) {
  animation-delay: 0.05s;
}

section:nth-child(3) {
  animation-delay: 0.1s;
}

section:nth-child(4) {
  animation-delay: 0.15s;
}

section:nth-child(5) {
  animation-delay: 0.2s;
}

section:nth-child(6) {
  animation-delay: 0.25s;
}

section:nth-child(7) {
  animation-delay: 0.3s;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

h1 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--text);
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.9rem;
  font-weight: 650;
  margin: 40px 0 20px;
  color: var(--text);
  border-left: 6px solid var(--primary);
  padding-left: 18px;
  letter-spacing: -0.01em;
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 2px;
}

h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 28px 0 14px;
  color: var(--text-secondary);
}

h4 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 20px 0 10px;
  color: var(--teal);
}

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

.hero {
  background: linear-gradient(135deg, var(--bg-hero-start) 0%, var(--bg-hero-end) 100%);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--glass-border);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(192, 57, 43, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(230, 126, 34, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero h1 {
  position: relative;
  z-index: 1;
}

.hero p {
  font-size: 1.15rem;
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  margin: 24px 0;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--teal));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
  border-radius: 3px 3px 0 0;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.card:hover::before {
  transform: scaleX(1);
}

.card svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  transition: transform var(--transition-base);
}

.card:hover svg {
  transform: scale(1.1) rotate(-4deg);
}

.card h4 {
  margin-top: 0;
  color: var(--text);
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: center;
  text-align: center;
  padding: 32px 0;
}

.stat-item {
  flex: 1 1 160px;
  padding: 20px 12px;
  border-radius: var(--radius-md);
  transition: background var(--transition-base), transform var(--transition-base);
}

.stat-item:hover {
  background: var(--bg-alt);
  transform: translateY(-4px);
}

.stat-item .number {
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-item .label {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

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

.article-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

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

.article-item:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.article-item h4 {
  margin-top: 0;
  font-size: 1.2rem;
  transition: color var(--transition-fast);
}

.article-item:hover h4 {
  color: var(--primary);
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 8px;
}

.read-more {
  display: inline-block;
  margin-top: 12px;
  color: var(--primary);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.read-more:hover {
  color: var(--primary-dark);
  transform: translateX(4px);
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
  transition: background var(--transition-fast);
}

.faq-item:hover {
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  padding-left: 12px;
  padding-right: 12px;
  margin-left: -12px;
  margin-right: -12px;
}

.faq-question {
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
  transition: color var(--transition-fast);
  gap: 12px;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-question span {
  font-size: 0.8rem;
  color: var(--text-light);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.faq-item:hover .faq-question span {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  margin-top: 12px;
  color: var(--text-secondary);
  display: block;
  padding-right: 20px;
  line-height: 1.75;
}

.contact-info {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 36px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-base);
}

.contact-info:hover {
  box-shadow: var(--shadow-lg);
}

.contact-info div {
  flex: 1 1 200px;
}

.contact-info h4 {
  margin-bottom: 8px;
  color: var(--teal);
}

.contact-info p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

.site-footer {
  background: linear-gradient(135deg, #1e2b2f 0%, #162022 100%);
  color: #cfd9db;
  padding: 48px 0 24px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  margin-top: 60px;
  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(--teal));
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  margin-bottom: 36px;
}

.footer-grid h4 {
  color: #ffffff;
  margin-bottom: 16px;
  font-size: 1rem;
  margin-top: 0;
}

.footer-grid a {
  color: #b0c4c8;
  text-decoration: none;
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-grid a:hover {
  color: #ffffff;
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid #2f3e42;
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.85rem;
  color: #8a9a9e;
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  box-shadow: var(--shadow-primary);
  font-size: 1.6rem;
  z-index: 999;
  transition: transform var(--transition-base), box-shadow var(--transition-base), opacity var(--transition-base);
  opacity: 0.85;
}

.back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 28px rgba(192, 57, 43, 0.45);
  opacity: 1;
  color: #fff;
}

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

@media (prefers-color-scheme: dark) {
  .site-footer {
    background: linear-gradient(135deg, #0e1517 0%, #0a1012 100%);
  }

  .card::before {
    background: linear-gradient(90deg, var(--primary-light), var(--accent-soft), var(--teal-light));
  }

  .article-item::after {
    background: linear-gradient(90deg, var(--primary-light), var(--accent-soft));
  }

  .hero::before {
    background: radial-gradient(circle, rgba(231, 76, 60, 0.1) 0%, transparent 70%);
  }

  .hero::after {
    background: radial-gradient(circle, rgba(243, 156, 18, 0.08) 0%, transparent 70%);
  }

  .search-box:focus-within {
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.2);
  }

  .faq-item:hover {
    background: #1a2528;
  }
}

@media (max-width: 1024px) {
  h1 {
    font-size: 2.1rem;
  }

  h2 {
    font-size: 1.7rem;
  }

  .hero {
    padding: 40px 32px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 12px;
    padding: 16px 0;
    order: 3;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    font-size: 1rem;
    padding: 8px 0;
  }

  .menu-toggle {
    display: block;
    order: 2;
  }

  .search-box {
    width: 100%;
    margin-top: 8px;
    order: 4;
  }

  .search-box input {
    width: 100%;
  }

  .logo {
    order: 1;
  }

  h1 {
    font-size: 1.9rem;
  }

  h2 {
    font-size: 1.6rem;
    padding-left: 14px;
    border-left-width: 5px;
  }

  h3 {
    font-size: 1.25rem;
  }

  .hero {
    padding: 32px 24px;
    border-radius: var(--radius-lg);
  }

  .hero p {
    font-size: 1.05rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .article-list {
    grid-template-columns: 1fr;
  }

  .contact-info {
    padding: 24px;
    gap: 24px;
    flex-direction: column;
  }

  .contact-info div {
    flex: 1 1 100%;
  }

  .stats {
    gap: 20px;
  }

  .stat-item .number {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1.4rem;
  }

  section {
    margin-bottom: 40px;
  }

  .faq-item:hover {
    padding-left: 8px;
    padding-right: 8px;
    margin-left: -8px;
    margin-right: -8px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.6rem;
  }

  h2 {
    font-size: 1.35rem;
    margin: 28px 0 16px;
  }

  h3 {
    font-size: 1.15rem;
  }

  h4 {
    font-size: 1.05rem;
  }

  .hero {
    padding: 24px 18px;
    border-radius: var(--radius-md);
  }

  .hero p {
    font-size: 1rem;
  }

  .card {
    padding: 22px 18px;
    border-radius: var(--radius-md);
  }

  .article-item {
    padding: 20px 16px;
  }

  .stat-item .number {
    font-size: 1.7rem;
  }

  .stat-item .label {
    font-size: 0.85rem;
  }

  .faq-question {
    font-size: 1rem;
  }

  .contact-info {
    padding: 20px 16px;
    border-radius: var(--radius-lg);
  }

  .site-footer {
    padding: 36px 0 20px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
}

@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;
  }
}

@media print {
  .site-header,
  .back-to-top,
  .search-box,
  .menu-toggle {
    display: none !important;
  }

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

  .card,
  .article-item,
  .contact-info {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }

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

::selection {
  background: rgba(192, 57, 43, 0.18);
  color: var(--primary-dark);
}

@media (prefers-color-scheme: dark) {
  ::selection {
    background: rgba(231, 76, 60, 0.3);
    color: #fff;
  }
}

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  border-radius: 5px;
  border: 2px solid var(--bg-alt);
}

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

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
  color: #fff;
}