:root {
  --color-primary: #f7931a;
  --color-primary-dark: #e07e00;
  --color-secondary: #1a1a2e;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #e0e0e0;
  --color-success: #28a745;
  --color-warning: #ffc107;
  --color-error: #dc3545;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.7;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  --container-max: 1200px;
  --header-height: 64px;
  --border-radius: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
}
body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
main {
  flex: 1;
  padding-bottom: var(--spacing-xxl);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover, a:focus {
  color: var(--color-primary-dark);
  text-decoration: underline;
}
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-md);
}
h1 { font-size: 2rem; }
h2 { font-size: 1.625rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }
p { margin-bottom: var(--spacing-md); }
ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--spacing-md);
  background: var(--color-primary);
  color: #fff;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  z-index: 10000;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: var(--spacing-md);
  outline: 2px solid var(--color-secondary);
}
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--spacing-md);
}
.logo-link {
  display: flex;
  align-items: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-secondary);
  text-decoration: none;
}
.logo-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  position: relative;
}
.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-secondary);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 10px;
}
.nav-toggle-icon::before { top: 14px; }
.nav-toggle-icon::after { bottom: 14px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background: transparent;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  top: 21px;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  bottom: 21px;
  transform: rotate(-45deg);
}
.main-nav {
  display: flex;
  align-items: center;
}
.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-lg);
}
.nav-item {
  margin: 0;
}
.nav-link {
  display: block;
  padding: var(--spacing-sm) 0;
  color: var(--color-text);
  font-weight: 500;
  text-decoration: none;
  position: relative;
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}
.nav-link:hover::after,
.nav-link.is-active::after {
  width: 100%;
}
.nav-link.is-active {
  color: var(--color-primary);
}
.header-cta {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  min-height: 44px;
  min-width: 44px;
  justify-content: center;
}
.header-cta:hover {
  background: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}
.hero {
  padding: var(--spacing-xxl) 0;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}
.hero-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}
.hero-desc {
  font-size: 1.125rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
}
.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}
.hero-image img {
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
  min-height: 44px;
  min-width: 44px;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}
.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover {
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
}
.breadcrumb {
  padding: var(--spacing-md) 0;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
}
.breadcrumb-item {
  display: flex;
  align-items: center;
}
.breadcrumb-item:not(:last-child)::after {
  content: "/";
  margin-left: var(--spacing-sm);
  color: var(--color-text-light);
}
.breadcrumb-item a {
  color: var(--color-text-light);
}
.breadcrumb-item:last-child {
  color: var(--color-text);
  font-weight: 500;
}
.section {
  padding: var(--spacing-xxl) 0;
}
.section-alt {
  background: var(--color-bg-alt);
}
.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}
.section-desc {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
  color: var(--color-text-light);
}
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}
.card {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.card-image {
  aspect-ratio: 3/2;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.card-content {
  padding: var(--spacing-lg);
}
.card-title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
}
.card-title a {
  color: var(--color-secondary);
  text-decoration: none;
}
.card-title a:hover {
  color: var(--color-primary);
}
.card-desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  background: var(--color-bg);
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-secondary);
  gap: var(--spacing-md);
  min-height: 44px;
}
.faq-question:hover {
  background: var(--color-bg-alt);
}
.faq-toggle-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
}
.faq-toggle-icon::before,
.faq-toggle-icon::after {
  content: "";
  position: absolute;
  background: var(--color-text);
  transition: transform var(--transition-fast);
}
.faq-toggle-icon::before {
  width: 100%;
  height: 2px;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}
.faq-toggle-icon::after {
  width: 2px;
  height: 100%;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
}
.faq-question[aria-expanded="true"] .faq-toggle-icon::after {
  transform: translateX(-50%) rotate(90deg);
}
.faq-answer {
  display: none;
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  background: var(--color-bg-alt);
}
.faq-answer.is-open {
  display: block;
}
.faq-answer-content {
  color: var(--color-text-light);
  line-height: 1.8;
}
.cta-section {
  padding: var(--spacing-xxl) 0;
  background: linear-gradient(135deg, var(--color-secondary) 0%, #2a2a4e 100%);
}
.cta-box {
  text-align: center;
  color: #fff;
}
.cta-title {
  color: #fff;
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}
.cta-desc {
  opacity: 0.9;
  margin-bottom: var(--spacing-xl);
}
.cta-tochat {
  background: var(--color-primary);
  color: #fff;
}
.cta-tochat:hover {
  background: var(--color-primary-dark);
  color: #fff;
}
.article-header {
  padding: var(--spacing-xl) 0;
  background: var(--color-bg-alt);
}
.article-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  color: var(--color-text-light);
  font-size: 0.875rem;
}
.meta-label {
  font-weight: 500;
}
.article-content {
  padding: var(--spacing-xl) 0;
  max-width: 800px;
  margin: 0 auto;
}
.article-content h2 {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}
.article-content h3 {
  margin-top: var(--spacing-lg);
}
.article-content p {
  margin-bottom: var(--spacing-lg);
}
.article-content ul,
.article-content ol {
  margin-bottom: var(--spacing-lg);
}
.article-content li {
  margin-bottom: var(--spacing-sm);
}
.related-links {
  padding: var(--spacing-xl);
  background: var(--color-bg-alt);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-xl);
}
.related-title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
}
.related-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.related-item {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}
.related-item:last-child {
  border-bottom: none;
}
.related-reason {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: var(--spacing-xs);
}
.compare-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--spacing-lg) 0;
}
.compare-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  background: var(--color-bg);
}
.compare-table th,
.compare-table td {
  padding: var(--spacing-md);
  text-align: left;
  border: 1px solid var(--color-border);
  vertical-align: top;
}
.compare-table th {
  background: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-secondary);
  white-space: nowrap;
}
.compare-table tbody tr:hover {
  background: var(--color-bg-alt);
}
.site-footer {
  background: var(--color-secondary);
  color: #fff;
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}
.footer-title {
  font-size: 1rem;
  color: #fff;
  margin-bottom: var(--spacing-md);
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: var(--spacing-sm);
}
.footer-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}
.footer-links a:hover {
  color: var(--color-primary);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
}
.footer-meta {
  margin-bottom: var(--spacing-md);
}
.footer-sitemap {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}
.footer-sitemap a {
  color: rgba(255,255,255,0.7);
}
.footer-sitemap a:hover {
  color: var(--color-primary);
}
.footer-disclaimer {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.6);
  max-width: 700px;
  margin: 0 auto var(--spacing-sm);
}
.footer-update {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.5);
}
.footer-copyright {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
}
.sticky-chat {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1001;
  background: var(--color-primary);
  padding: var(--spacing-sm);
  padding-bottom: calc(var(--spacing-sm) + env(safe-area-inset-bottom, 0px));
  box-shadow: 0 -2px 10px rgba(0,0,0,0.15);
}
.sticky-chat-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-md);
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
}
.sticky-chat-icon {
  flex-shrink: 0;
}
.sticky-chat-close {
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-sm);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.2);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  padding: 0;
}
.sticky-chat-close:hover {
  background: rgba(255,255,255,0.3);
}
.sticky-chat.is-hidden {
  display: none !important;
}
body.has-sticky-chat {
  padding-bottom: 70px;
}
.page-header {
  padding: var(--spacing-xl) 0;
  background: var(--color-bg-alt);
  text-align: center;
}
.page-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}
.page-desc {
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}
.page-content {
  padding: var(--spacing-xl) 0;
}
.text-center { text-align: center; }
.text-left { text-align: left; }
.mb-0 { margin-bottom: 0; }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mt-xl { margin-top: var(--spacing-xl); }
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.375rem; }
  h3 { font-size: 1.125rem; }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    order: 2;
  }
  .header-cta {
    order: 1;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
  }
  .main-nav.is-open {
    display: block;
  }
  .nav-list {
    flex-direction: column;
    gap: 0;
  }
  .nav-item {
    border-bottom: 1px solid var(--color-border);
  }
  .nav-item:last-child {
    border-bottom: none;
  }
  .nav-link {
    padding: var(--spacing-md);
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-title {
    font-size: 1.75rem;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-image {
    order: -1;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
  .sticky-chat {
    display: block;
  }
  body.has-sticky-chat main {
    padding-bottom: var(--spacing-xl);
  }
  .article-title {
    font-size: 1.5rem;
  }
  .article-meta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  .compare-table th,
  .compare-table td {
    padding: var(--spacing-sm);
    font-size: 0.875rem;
  }
}
@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .btn {
    width: 100%;
  }
  .hero-actions {
    flex-direction: column;
  }
}