```css
/* ===== CSS RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-light);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

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

a { color: var(--text-accent); text-decoration: none; transition: opacity 0.2s, color 0.2s; }
a:hover { opacity: 0.8; }

ul, ol { padding-left: 1.5rem; }

h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; letter-spacing: -0.02em; margin-bottom: 0.5rem; }

/* ===== CSS VARIABLES (THEMES) ===== */
:root {
  --bg-light: #f8fafc;
  --bg-dark: #0f172a;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-accent: #1f4e8c;
  --border-light: #e2e8f0;
  --card-bg: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.85);
  --footer-bg: #1e293b;
  --footer-text: #cbd5e1;
  --btn-bg: #1f4e8c;
  --btn-text: #ffffff;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --blur: blur(12px);
  --gradient-primary: linear-gradient(135deg, #1e3a5f 0%, #1f4e8c 50%, #2d6a9f 100%);
  --gradient-accent: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-soft: linear-gradient(145deg, #f0f4ff, #e8edf5);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-light: #0f172a;
  --bg-dark: #0b1220;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-accent: #6ea8fe;
  --border-light: #334155;
  --card-bg: #1e293b;
  --nav-bg: rgba(15, 23, 42, 0.9);
  --footer-bg: #0f172a;
  --footer-text: #94a3b8;
  --btn-bg: #3b82f6;
  --btn-text: #ffffff;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --gradient-primary: linear-gradient(135deg, #1e2c44 0%, #1e3a5f 50%, #1f4e8c 100%);
  --gradient-soft: linear-gradient(145deg, #1e293b, #0f172a);
}

/* ===== LAYOUT CONTAINER ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* ===== NAVBAR ===== */
.navbar {
  background: var(--nav-bg);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
  gap: 1rem;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.3s ease;
}

.logo:hover { transform: scale(1.02); }

.menu {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.menu a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s, color 0.3s;
  position: relative;
}

.menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--text-accent);
  transition: width 0.3s ease;
}

.menu a:hover::after, .menu a:focus::after { width: 100%; }
.menu a:hover { color: var(--text-accent); }

.nav-actions {
  display: flex;
  gap: 0.8rem;
  align-items: center;
}

/* ===== BUTTONS ===== */
.btn {
  background: var(--btn-bg);
  color: var(--btn-text);
  border: 2px solid transparent;
  padding: 0.6rem 1.4rem;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 14px rgba(31, 78, 140, 0.3);
}

.btn:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(31, 78, 140, 0.4);
}

.btn:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  border: 2px solid var(--text-accent);
  color: var(--text-accent);
  box-shadow: none;
}

.btn-outline:hover { background: var(--text-accent); color: #fff; }

/* ===== SEARCH BOX ===== */
.search-box {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: 50px;
  padding: 0.3rem 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.search-box:focus-within {
  border-color: var(--text-accent);
  box-shadow: 0 0 0 3px rgba(31, 78, 140, 0.1);
}

.search-box input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  outline: none;
  padding: 0.4rem 0.3rem;
  width: 140px;
  font-size: 0.9rem;
  transition: width 0.3s;
}

.search-box input::placeholder { color: var(--text-secondary); opacity: 0.7; }

.search-box input:focus { width: 180px; }

/* ===== BANNER ===== */
.banner {
  background: var(--gradient-primary);
  color: white;
  padding: 4rem 2.5rem;
  border-radius: var(--radius-lg);
  margin: 2rem 0;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.8s ease both;
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.banner::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.banner h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.banner p {
  font-size: 1.1rem;
  max-width: 600px;
  position: relative;
  z-index: 1;
  opacity: 0.95;
  margin-bottom: 1.5rem;
}

.banner .btn {
  background: #ffffff;
  color: #1f4e8c;
  border: none;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
}

.banner .btn:hover { transform: translateY(-2px) scale(1.02); }

/* ===== SECTIONS ===== */
section {
  padding: 2rem 0;
  animation: fadeInUp 0.6s ease both;
}

section h2 {
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  border-bottom: 2px solid var(--border-light);
  padding-bottom: 0.6rem;
  margin-bottom: 1.5rem;
  position: relative;
}

section h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--text-accent);
}

/* ===== CARD GRID ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.8rem;
  margin: 2rem 0;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.6s ease both;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--text-accent);
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card h4 {
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
}

.card .meta {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin: 0.8rem 0;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.card p { color: var(--text-primary); }

.card .badge {
  display: inline-block;
  background: var(--text-accent);
  color: white;
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-top: 0.5rem;
}

/* ===== FAQ ===== */
.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.faq-item:hover { box-shadow: var(--shadow-md); border-color: var(--text-accent); }

.faq-question {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  gap: 1rem;
}

.faq-question span {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--text-accent);
  transition: transform 0.3s;
  flex-shrink: 0;
}

.faq-item.active .faq-question span { transform: rotate(45deg); }

.faq-answer {
  color: var(--text-primary);
  margin-top: 0.8rem;
  line-height: 1.7;
  display: none;
  animation: fadeIn 0.3s ease;
}

.faq-item.active .faq-answer { display: block; }

/* ===== FOOTER ===== */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  border-top: 3px solid var(--text-accent);
}

.footer a {
  color: var(--footer-text);
  text-decoration: underline;
  transition: color 0.3s;
}

.footer a:hover { color: #ffffff; }

.footer .col-title {
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 1rem;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.footer p { margin-bottom: 0.5rem; }

/* ===== TABLE ===== */
.table-wrap { overflow-x: auto; margin: 1.5rem 0; }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

th {
  background: var(--text-accent);
  color: white;
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  letter-spacing: 0.02em;
}

td {
  border-bottom: 1px solid var(--border-light);
  padding: 14px 16px;
  color: var(--text-primary);
}

tr:last-child td { border-bottom: none; }

tr:hover td { background: rgba(31, 78, 140, 0.03); }

/* ===== SCROLL TOP ===== */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--btn-bg);
  color: var(--btn-text);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  font-size: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ===== BADGE ===== */
.badge {
  background: var(--text-accent);
  color: white;
  padding: 0.25rem 0.9rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-block;
  letter-spacing: 0.02em;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ===== SCROLL REVEAL (Intersection Observer) ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== HOVER EFFECTS ===== */
.card:hover .badge { background: var(--gradient-accent); }

.card:hover h3 { color: var(--text-accent); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .container { padding: 0 15px; }

  .nav-inner { flex-direction: column; align-items: stretch; gap: 0.8rem; }

  .menu {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: center;
  }

  .menu a { padding: 0.3rem 0.5rem; font-size: 0.9rem; }

  .nav-actions {
    display: flex;
    justify-content: space-between;
    width: 100%;
  }

  .search-box { flex: 1; max-width: 100%; }

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

  .banner {
    padding: 2.5rem 1.5rem;
    border-radius: var(--radius-md);
  }

  .banner h1 { font-size: 1.8rem; }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }

  .card { padding: 1.5rem; }

  .scroll-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }

  section { padding: 1.5rem 0; }

  section h2 { font-size: 1.5rem; }

  .faq-question { font-size: 0.95rem; }

  .footer { padding: 2rem 0 1.5rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 12px; }

  .logo { font-size: 1.3rem; }

  .menu { gap: 0.5rem; }
  .menu a { font-size: 0.8rem; padding: 0.2rem 0.4rem; }

  .btn { padding: 0.5rem 1rem; font-size: 0.8rem; }

  .banner { padding: 2rem 1rem; }
  .banner h1 { font-size: 1.5rem; }
  .banner p { font-size: 0.95rem; }

  .card-grid { gap: 1rem; }
  .card { padding: 1.2rem; }

  .faq-item { padding: 1rem; }
  .faq-question { font-size: 0.9rem; }

  .scroll-top {
    bottom: 15px;
    right: 15px;
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }
}

/* ===== DARK MODE SPECIFIC ===== */
[data-theme="dark"] .banner {
  background: var(--gradient-primary);
}

[data-theme="dark"] .banner h1,
[data-theme="dark"] .banner p { color: #f1f5f9; }

[data-theme="dark"] th { background: #2d3b50; }

[data-theme="dark"] .card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  border-color: var(--text-accent);
}

[data-theme="dark"] .btn {
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--text-accent);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--btn-bg);
}

/* ===== PRINT STYLES ===== */
@media print {
  .navbar, .scroll-top, .btn, .search-box { display: none !important; }
  body { background: white; color: black; }
  .card { box-shadow: none; border: 1px solid #ccc; }
}
```