:root {
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-soft: #f1f5f9;
  --bg-nav: rgba(255, 255, 255, 0.82);
  --bg-footer: #1e293b;
  --bg-card: #ffffff;
  --bg-hero: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 45%, #ede9fe 100%);
  --bg-tag: #e2e8f0;
  --bg-btn-primary: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  --bg-btn-secondary: #e2e8f0;
  --bg-input: #ffffff;
  --bg-faq-active: #f8fafc;
  --bg-glass: rgba(255, 255, 255, 0.6);
  --bg-glass-border: rgba(255, 255, 255, 0.5);

  --text-primary: #17202a;
  --text-heading: #0f172a;
  --text-secondary: #334155;
  --text-muted: #475569;
  --text-light: #64748b;
  --text-inverse: #ffffff;
  --text-link: #1d4ed8;
  --text-link-hover: #1e3a8a;
  --text-btn-primary: #ffffff;
  --text-btn-secondary: #1e293b;
  --text-tag: #1e293b;
  --text-footer: #cbd5e1;
  --text-footer-heading: #f1f5f9;

  --border-color: #e2e8f0;
  --border-focus: #2563eb;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 8px 24px -6px rgba(37, 99, 235, 0.35);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark {
  --bg-body: #0b1120;
  --bg-surface: #1e293b;
  --bg-soft: #1e293b;
  --bg-nav: rgba(15, 23, 42, 0.82);
  --bg-footer: #0b1120;
  --bg-card: #1e293b;
  --bg-hero: linear-gradient(135deg, #1e293b 0%, #1e3a8a 60%, #312e81 100%);
  --bg-tag: #334155;
  --bg-btn-primary: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
  --bg-btn-secondary: #334155;
  --bg-input: #1e293b;
  --bg-faq-active: #1e293b;
  --bg-glass: rgba(30, 41, 59, 0.6);
  --bg-glass-border: rgba(148, 163, 184, 0.25);

  --text-primary: #e5e7eb;
  --text-heading: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-light: #94a3b8;
  --text-inverse: #0f172a;
  --text-link: #60a5fa;
  --text-link-hover: #93c5fd;
  --text-btn-primary: #ffffff;
  --text-btn-secondary: #e2e8f0;
  --text-tag: #e2e8f0;
  --text-footer: #cbd5e1;
  --text-footer-heading: #f1f5f9;

  --border-color: #334155;
  --border-focus: #60a5fa;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
  --shadow-glow: 0 8px 24px -6px rgba(59, 130, 246, 0.4);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  transition: background-color 0.4s ease, color 0.4s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(600px circle at 10% 5%, rgba(99, 102, 241, 0.08), transparent 55%),
    radial-gradient(700px circle at 90% 15%, rgba(59, 130, 246, 0.07), transparent 55%),
    radial-gradient(500px circle at 50% 90%, rgba(139, 92, 246, 0.06), transparent 60%);
  pointer-events: none;
  transition: opacity 0.4s ease;
}

body.dark::before {
  background:
    radial-gradient(600px circle at 10% 5%, rgba(99, 102, 241, 0.14), transparent 55%),
    radial-gradient(700px circle at 90% 15%, rgba(59, 130, 246, 0.12), transparent 55%),
    radial-gradient(500px circle at 50% 90%, rgba(139, 92, 246, 0.1), transparent 60%);
}

a {
  color: var(--text-link);
  transition: color var(--transition-base);
}

a:hover {
  color: var(--text-link-hover);
}

::selection {
  background: rgba(37, 99, 235, 0.25);
  color: var(--text-heading);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg-soft);
}

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

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-nav);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .navbar {
    background-color: var(--bg-surface);
  }
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-heading);
  text-decoration: none;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: transform var(--transition-base), color var(--transition-base);
}

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

.logo svg {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.logo:hover svg {
  transform: rotate(-6deg);
  box-shadow: 0 10px 28px -6px rgba(37, 99, 235, 0.5);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  position: relative;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-base);
  padding: 6px 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--bg-btn-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--text-link);
}

.nav-links a:hover::after,
.nav-links a:focus::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  display: flex;
  align-items: center;
  background-color: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  transition: border-color var(--transition-base), background-color var(--transition-base), box-shadow var(--transition-base);
}

.search-box:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-box input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  width: 140px;
  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;
  padding: 2px;
  transition: color var(--transition-base), transform var(--transition-base);
}

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

.theme-toggle {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  cursor: pointer;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.theme-toggle:hover {
  color: var(--text-link);
  border-color: var(--border-focus);
  transform: rotate(18deg) scale(1.05);
  box-shadow: var(--shadow-glow);
}

.theme-toggle:active {
  transform: rotate(18deg) scale(0.96);
}

.mobile-menu-btn {
  display: none;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px 10px;
  color: var(--text-secondary);
  transition: color var(--transition-base), border-color var(--transition-base);
}

.mobile-menu-btn:hover {
  color: var(--text-link);
  border-color: var(--border-focus);
}

.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  animation: fadeSlideDown 0.6s ease both;
}

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

.breadcrumb a:hover {
  text-decoration: underline;
  color: var(--text-link-hover);
}

.breadcrumb span {
  color: var(--text-muted);
  margin: 0 6px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 64px 0 56px;
  background: var(--bg-hero);
  border-radius: var(--radius);
  margin-top: 20px;
  box-shadow: var(--shadow-md);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -15%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.55), transparent 70%);
  pointer-events: none;
  animation: floatBlob 12s ease-in-out infinite;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -45%;
  left: -12%;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.28), transparent 70%);
  pointer-events: none;
  animation: floatBlob 15s ease-in-out infinite reverse;
}

body.dark .hero::before {
  background: radial-gradient(circle, rgba(59, 130, 246, 0.22), transparent 70%);
}

body.dark .hero::after {
  background: radial-gradient(circle, rgba(139, 92, 246, 0.25), transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  padding: 0 20px;
}

.hero h1 {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  background: linear-gradient(120deg, var(--text-heading) 20%, #2563eb 60%, #7c3aed 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

body.dark .hero h1 {
  background: linear-gradient(120deg, #f8fafc 20%, #93c5fd 60%, #c4b5fd 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition-base), color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
  font-family: inherit;
}

.btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 60%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}

.btn:hover::after {
  left: 140%;
}

.btn-primary {
  background: var(--bg-btn-primary);
  color: var(--text-btn-primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover,
.btn-primary:focus {
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
  color: var(--text-btn-primary);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-secondary {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-btn-secondary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover,
.btn-secondary:focus {
  border-color: var(--border-focus);
  transform: translateY(-2px);
  color: var(--text-link);
  box-shadow: var(--shadow-md);
}

.btn-secondary:active {
  transform: translateY(0) scale(0.98);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 40px 0;
}

.stat-item {
  position: relative;
  overflow: hidden;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 26px 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
}

.stat-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--bg-btn-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.stat-item:hover::before {
  transform: scaleX(1);
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.section {
  margin: 64px 0;
}

.section-header {
  margin-bottom: 32px;
  position: relative;
}

.section-header h2 {
  position: relative;
  display: inline-block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.section-header h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 48px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--bg-btn-primary);
  transition: width var(--transition-base);
}

.section-header:hover h2::after {
  width: 84px;
}

.section-header p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 720px;
  margin-top: 8px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}

.card {
  position: relative;
  overflow: hidden;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
}

.card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.16), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-base), transform var(--transition-base);
  pointer-events: none;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--border-focus);
}

.card:hover::before {
  opacity: 1;
  transform: scale(1.2);
}

.card h3 {
  position: relative;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 10px;
}

.card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
}

.article-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
}

.article-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--bg-btn-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

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

.article-card:hover::after {
  transform: scaleY(1);
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 10px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-meta span:first-child {
  color: var(--text-link);
  font-weight: 600;
}

.article-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 8px;
  line-height: 1.5;
  transition: color var(--transition-base);
}

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

.article-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 14px;
}

.read-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-link);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-base), gap var(--transition-base), transform var(--transition-base);
}

.read-more:hover {
  color: var(--text-link-hover);
  gap: 9px;
  transform: translateX(2px);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

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

.faq-item.active {
  background: var(--bg-faq-active);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 19px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: inherit;
  transition: color var(--transition-base), background-color var(--transition-base);
}

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

.faq-question .icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--bg-tag);
  transition: transform var(--transition-base), background-color var(--transition-base), color var(--transition-base);
  color: var(--text-muted);
  font-size: 1.15rem;
  line-height: 1;
}

.faq-item.active .faq-question .icon {
  transform: rotate(135deg);
  background: var(--bg-btn-primary);
  color: var(--text-btn-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
  padding: 0 24px;
  opacity: 0;
}

.faq-item.active .faq-answer {
  max-height: 700px;
  padding: 0 24px 22px;
  opacity: 1;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  counter-reset: step;
}

.howto-step {
  position: relative;
  overflow: hidden;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 26px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
}

.howto-step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-btn-primary);
  color: var(--text-btn-primary);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 16px;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base);
}

.howto-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

.howto-step:hover::before {
  transform: scale(1.1) rotate(-6deg);
}

.howto-step h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.howto-step p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

thead th {
  background-color: var(--bg-soft);
  color: var(--text-heading);
  font-weight: 700;
  text-align: left;
  padding: 15px 20px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

tbody td {
  padding: 14px 20px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  line-height: 1.65;
  transition: color var(--transition-base);
}

tbody tr {
  transition: background-color var(--transition-base);
}

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

tbody tr:hover {
  background-color: var(--bg-soft);
}

tbody tr:hover td:first-child {
  color: var(--text-link);
  font-weight: 600;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.tag {
  display: inline-flex;
  align-items: center;
  background: var(--bg-tag);
  color: var(--text-tag);
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.tag:hover {
  background: var(--bg-btn-primary);
  color: var(--text-btn-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.footer {
  position: relative;
  background-color: var(--bg-footer);
  color: var(--text-footer);
  padding: 56px 0 24px;
  margin-top: 72px;
  transition: background-color var(--transition-base), color var(--transition-base);
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--bg-btn-primary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 32px;
  margin-bottom: 36px;
}

.footer h4 {
  color: var(--text-footer-heading);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

.footer h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--bg-btn-primary);
}

.footer p {
  font-size: 0.9rem;
  color: var(--text-footer);
  line-height: 1.85;
}

.footer ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer ul a {
  color: var(--text-footer);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-base), padding-left var(--transition-base);
}

.footer ul a:hover {
  color: #93c5fd;
  padding-left: 6px;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid #334155;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-footer);
}

.footer-bottom a {
  color: var(--text-footer);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-bottom a:hover {
  color: #93c5fd;
  text-decoration: underline;
}

.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-btn-primary);
  color: var(--text-btn-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  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);
  z-index: 999;
}

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

.back-to-top:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px) scale(1.06);
}

.back-to-top:active {
  transform: translateY(-2px) scale(0.98);
}

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  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;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes floatBlob {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(-18px, 22px) scale(1.06);
  }
  66% {
    transform: translate(14px, -16px) scale(0.96);
  }
}

@keyframes fadeSlideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-nav);
    backdrop-filter: saturate(180%) blur(18px);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    border-bottom: 1px solid var(--border-color);
    padding: 18px 20px;
    gap: 16px;
    box-shadow: var(--shadow-lg);
    animation: fadeSlideDown 0.3s ease both;
  }

  .nav-links.open a::after {
    display: none;
  }

  .hero {
    padding: 48px 0 42px;
  }

  .hero h1 {
    font-size: 1.65rem;
  }

  .hero p {
    font-size: 0.98rem;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .section {
    margin: 48px 0;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

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

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

@media (max-width: 480px) {
  .stats {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 1.4rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .section-header h2 {
    font-size: 1.35rem;
  }

  .card,
  .article-card {
    padding: 22px 18px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .faq-answer {
    padding: 0 18px;
  }

  .faq-item.active .faq-answer {
    padding: 0 18px 18px;
  }

  .search-box {
    display: none;
  }
}

@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;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}