:root {
  --color-primary-50: #E6EBF2;
  --color-primary-100: #C4D1E3;
  --color-primary-200: #9FB4D0;
  --color-primary-300: #7A97BD;
  --color-primary-400: #557AAA;
  --color-primary-500: #1E3A8A;
  --color-primary-600: #1B3470;
  --color-primary-700: #182B5F;
  --color-primary-800: #14214A;
  --color-primary-900: #101C3A;
  --color-secondary-50: #F3F4F6;
  --color-secondary-100: #E5E7EB;
  --color-secondary-200: #D1D5DB;
  --color-secondary-300: #9CA3AF;
  --color-secondary-400: #6B7280;
  --color-secondary-500: #4B5563;
  --color-secondary-600: #374151;
  --color-secondary-700: #2D3748;
  --color-secondary-800: #1F2937;
  --color-secondary-900: #111827;
  --color-accent-50: #F9FAFB;
  --color-accent-100: #F3F4F6;
  --color-accent-200: #E5E7EB;
  --color-accent-300: #D1D5DB;
  --color-accent-400: #9CA3AF;
  --color-accent-500: #6B7280;
  --color-accent-600: #4B5563;
  --color-text-primary: #1F2937;
  --color-text-secondary: #4B5563;
  --color-text-tertiary: #9CA3AF;
  --color-text-inverse: #FFFFFF;
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F3F4F6;
  --color-bg-tertiary: #E5E7EB;
  --color-border-light: #E5E7EB;
  --color-border-medium: #D1D5DB;
  --color-border-strong: #9CA3AF;
  --duration-instant: 0ms;
  --duration-fast: 150ms;
  --duration-base: 200ms;
  --duration-slow: 300ms;
  --duration-slower: 500ms;
  --duration-slowest: 600ms;
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-expo-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-expo-in: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-sm-hover: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-md-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-lg-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-xl-hover: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 40px rgba(30, 58, 138, 0.3);
  --shadow-glow-hover: 0 0 60px rgba(30, 58, 138, 0.5);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-3xl: 24px;
  --radius-full: 9999px;
  --gradient-primary: linear-gradient(135deg, #1E3A8A 0%, #14214A 100%);
  --gradient-hero: linear-gradient(135deg, #F3F4F6 0%, #E5E7EB 50%, #D1D5DB 100%);
  --gradient-subtle: linear-gradient(180deg, rgba(30, 58, 138, 0.05) 0%, rgba(55, 65, 81, 0.05) 100%);
  --gradient-button: linear-gradient(135deg, #1E3A8A 0%, #1B3470 100%);
  --gradient-button-hover: linear-gradient(135deg, #1B3470 0%, #14214A 100%);
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(30, 58, 138, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(31, 41, 55, 0.1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:focus-visible { outline: 2px solid var(--color-primary-500); outline-offset: 2px; }
:focus:not(:focus-visible) { outline: none; }

::selection { background: var(--color-primary-200); color: var(--color-primary-900); }

h1, h2, h3, h4, h5, h6 {
  font-family: 'Sora', 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.375rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.375rem; }
}

a { color: var(--color-primary-500); text-decoration: none; }
a:hover { color: var(--color-primary-600); text-decoration: underline; }

.container {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page-wrap {
  max-width: 72rem;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  padding: 3rem;
  margin-bottom: 2rem;
  border: 1px solid var(--color-border-light);
}

.card-lg {
  padding: 4rem;
}

.text-center { text-align: center; }
.text-secondary { color: var(--color-text-secondary); }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-6 { margin-bottom: 3rem; }
.mb-8 { margin-bottom: 4rem; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mt-6 { margin-top: 3rem; }

ul, ol { margin-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: 0.5rem; line-height: 1.8; color: var(--color-text-secondary); }

.blog-content p {
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.8;
  font-size: 1.0625rem;
}

.blog-content h2 {
  margin-top: 3rem;
  margin-bottom: 1rem;
  color: var(--color-text-primary);
}

.blog-content h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-primary);
}

.blog-content ul, .blog-content ol {
  margin-bottom: 1.5rem;
}

.blog-content li {
  margin-bottom: 0.5rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
}

.blog-content strong {
  color: var(--color-text-primary);
}

.blog-content blockquote {
  border-left: 4px solid var(--color-primary-500);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--color-primary-50);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.blog-content .tip-box {
  background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
  border: 1px solid var(--color-primary-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.blog-content .tip-box strong {
  color: var(--color-primary-600);
}

.blog-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9375rem;
}

.blog-content th {
  background: var(--color-primary-500);
  color: white;
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
}

.blog-content td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-secondary);
}

.blog-content tr:nth-child(even) td {
  background: var(--color-accent-50);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-weight: 600;
  font-size: 1.0625rem;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-expo-out);
  border: none;
  text-decoration: none;
  user-select: none;
}

.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--gradient-button);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
}

.btn-primary:hover {
  background: var(--gradient-button-hover);
  box-shadow: 0 6px 20px rgba(30, 58, 138, 0.4);
  transform: translateY(-2px);
  color: white;
}

.btn-secondary {
  background: var(--color-bg-primary);
  color: var(--color-primary-600);
  border: 2px solid var(--color-primary-200);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-300);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--color-primary-600);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

.btn-block { width: 100%; }

.header-gradient {
  background: var(--gradient-hero);
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--color-border-light);
  position: relative;
  overflow: hidden;
}

.header-gradient::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(30, 58, 138, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 20s ease-in-out infinite;
}

.header-gradient::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.1); }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.header-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text-primary);
  font-family: 'Sora', 'Inter', sans-serif;
}

.header-sub {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.nav-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  font-weight: 600;
  font-size: 0.875rem;
}

.nav-link:hover {
  color: var(--color-primary-600);
  background: var(--color-primary-50);
  text-decoration: none;
}

.nav-link.active {
  background: linear-gradient(135deg, #1E3A8A 0%, #1B3470 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
}

.nav-link.active:hover {
  background: linear-gradient(135deg, #1B3470 0%, #14214A 100%);
  color: white;
}

.footer {
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border-light);
  padding: 3rem 0;
  margin-top: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-logo {
  width: 40px;
  height: 40px;
  background: var(--gradient-button);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1.25rem;
  font-family: 'Sora', sans-serif;
}

.footer-brand-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
  font-family: 'Sora', sans-serif;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-heading {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--duration-fast);
}

.footer-links a:hover {
  color: var(--color-primary-600);
  text-decoration: underline;
}

.footer-trust-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.footer-trust-item svg {
  width: 16px;
  height: 16px;
  fill: #10B981;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid var(--color-border-light);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  margin: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-primary-500);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb .sep {
  color: var(--color-text-tertiary);
}

.breadcrumb .current {
  color: var(--color-text-secondary);
  font-weight: 500;
}

.cta-section {
  background: var(--gradient-button);
  border-radius: var(--radius-2xl);
  padding: 3.5rem;
  text-align: center;
  color: white;
  margin-top: 3rem;
}

.cta-section h2 {
  color: white;
  margin-bottom: 1rem;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.125rem;
  margin-bottom: 2rem;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

.cta-section .btn {
  background: white;
  color: var(--color-primary-600);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.cta-section .btn:hover {
  background: var(--color-accent-50);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  color: var(--color-primary-700);
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--color-primary-50);
  color: var(--color-primary-600);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

.meta {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.meta-sep {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
}

.table-wrap {
  overflow-x: auto;
}

@media (max-width: 768px) {
  .card { padding: 1.5rem; }
  .card-lg { padding: 2rem; }
  .page-wrap { padding: 1.5rem 1rem; }
  .cta-section { padding: 2rem 1.5rem; }
  .cta-section h2 { font-size: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { gap: 0.25rem; }
  .nav-link { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
}