:root {
  --brand-primary: #1e1e2f;
  --brand-secondary: #e94e4e;
  --brand-accent: #f5b342;
  --brand-light: #f8f9fc;
  --brand-dark: #12121c;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-light: #ffffff;
  --bg-body: #ffffff;
  --bg-card: #ffffff;
  --bg-muted: #f2f3f7;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --border-color: #e0e2e8;
  --border-glass: rgba(255, 255, 255, 0.5);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 24px rgba(233, 78, 78, 0.25);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: all 0.25s ease;
  --transition-slow: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --gradient-brand: linear-gradient(135deg, #1e1e2f 0%, #2d2d4a 40%, #e94e4e 100%);
  --gradient-accent: linear-gradient(135deg, #e94e4e 0%, #f5b342 100%);
  --gradient-soft: linear-gradient(135deg, #f8f9fc 0%, #eef0f7 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(248,249,252,0.7));
}

[data-theme="dark"] {
  --brand-primary: #2a2a40;
  --brand-secondary: #ff6b6b;
  --brand-accent: #ffc857;
  --brand-light: #1a1a28;
  --brand-dark: #0a0a12;
  --text-primary: #eeeeff;
  --text-secondary: #b0b0cc;
  --text-light: #ffffff;
  --bg-body: #12121c;
  --bg-card: #1e1e2f;
  --bg-muted: #26263a;
  --bg-glass: rgba(30, 30, 47, 0.72);
  --border-color: #2e2e44;
  --border-glass: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 24px rgba(255, 107, 107, 0.3);
  --gradient-brand: linear-gradient(135deg, #0a0a12 0%, #1e1e2f 40%, #ff6b6b 100%);
  --gradient-accent: linear-gradient(135deg, #ff6b6b 0%, #ffc857 100%);
  --gradient-soft: linear-gradient(135deg, #1a1a28 0%, #26263a 100%);
  --gradient-card: linear-gradient(145deg, rgba(30,30,47,0.9), rgba(26,26,40,0.7));
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--brand-secondary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--brand-accent);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

::selection {
  background: var(--brand-secondary);
  color: #fff;
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--brand-secondary);
  border-radius: 10px;
  border: 2px solid var(--bg-muted);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--brand-accent);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
  background-color: var(--bg-glass);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  flex-shrink: 0;
  transition: var(--transition);
}

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

.logo svg {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  transition: var(--transition);
}

.logo:hover svg {
  transform: rotate(-6deg) scale(1.05);
  box-shadow: var(--shadow-glow);
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
  white-space: nowrap;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transition: width 0.3s ease, left 0.3s ease;
}

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

.nav-links a:hover::after {
  width: 100%;
  left: 0;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-muted);
  border-radius: 30px;
  padding: 6px 14px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--brand-secondary);
  box-shadow: 0 0 0 3px rgba(233, 78, 78, 0.12);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  color: var(--text-primary);
  font-size: 0.9rem;
  width: 140px;
  font-family: inherit;
}

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

.search-box button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  transition: var(--transition);
  padding: 2px;
}

.search-box button:hover {
  color: var(--brand-secondary);
  transform: scale(1.1);
}

.theme-toggle,
.menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 8px;
  border-radius: 50%;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover,
.menu-toggle:hover {
  background: var(--bg-muted);
  color: var(--brand-secondary);
  transform: rotate(15deg);
}

.menu-toggle {
  display: none;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-top: 1px solid var(--border-glass);
  padding: 16px 20px 24px;
  gap: 4px;
  animation: slideDown 0.3s ease;
}

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

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

.mobile-menu a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.mobile-menu a:hover {
  color: var(--brand-secondary);
  padding-left: 8px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 16px 0;
  align-items: center;
}

.breadcrumb a {
  color: var(--text-secondary);
}

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

.breadcrumb span {
  color: var(--text-primary);
  font-weight: 500;
}

.banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin: 24px auto 40px;
  max-width: 1200px;
  background: var(--gradient-brand);
  min-height: 300px;
  display: flex;
  align-items: center;
  padding: 48px 56px;
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

.banner::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 179, 66, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
  animation: floatOrb 8s ease-in-out infinite;
}

.banner::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(233, 78, 78, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
  animation: floatOrb 10s ease-in-out infinite reverse;
}

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

.banner-slide {
  display: none;
  width: 100%;
  animation: fadeInUp 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.banner-slide.active {
  display: block;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.banner h1,
.banner h2 {
  color: #fff;
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  max-width: 720px;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.banner p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.1rem;
  max-width: 620px;
  margin-bottom: 28px;
  line-height: 1.7;
}

.banner-btn {
  display: inline-block;
  background: var(--gradient-accent);
  color: #fff;
  padding: 14px 36px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(233, 78, 78, 0.35);
  position: relative;
  overflow: hidden;
}

.banner-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.banner-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(233, 78, 78, 0.5);
  color: #fff;
}

.banner-btn:hover::before {
  left: 100%;
}

.banner-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 2;
}

.banner-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: var(--transition);
}

.banner-dots span:hover {
  background: rgba(255, 255, 255, 0.7);
}

.banner-dots span.active {
  background: var(--brand-accent);
  width: 28px;
  border-radius: 8px;
  box-shadow: 0 0 12px rgba(245, 179, 66, 0.6);
}

section {
  padding: 72px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.section-header .divider {
  width: 64px;
  height: 4px;
  background: var(--gradient-accent);
  margin: 18px auto 0;
  border-radius: 4px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.card {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-glass);
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-secondary);
}

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

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--text-primary);
  font-weight: 700;
}

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

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: var(--transition);
  border: 1px solid var(--border-glass);
}

.card:hover .card-icon {
  transform: scale(1.08) rotate(-4deg);
  box-shadow: var(--shadow-glow);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.stat-item {
  text-align: center;
  padding: 28px 20px;
  background: var(--gradient-soft);
  border-radius: var(--radius-md);
  transition: var(--transition);
  border: 1px solid var(--border-glass);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 6px;
  font-weight: 500;
}

.article-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.article-item {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  padding: 26px;
  border: 1px solid var(--border-glass);
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.article-item::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s ease;
}

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

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

.article-item h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.4;
  transition: var(--transition);
}

.article-item:hover h3 {
  color: var(--brand-secondary);
}

.article-meta {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.article-meta span {
  position: relative;
}

.article-meta span + span::before {
  content: "·";
  margin-right: 16px;
  opacity: 0.5;
}

.article-item p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 14px;
  line-height: 1.7;
}

.read-more {
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--brand-secondary);
  transition: var(--transition);
}

.read-more:hover {
  gap: 10px;
  color: var(--brand-accent);
}

.faq-list {
  max-width: 880px;
  margin: 0 auto;
}

.faq-item {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--brand-secondary);
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  border-color: var(--brand-secondary);
  box-shadow: var(--shadow-md);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 26px;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1rem;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  gap: 12px;
  transition: var(--transition);
  font-family: inherit;
}

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

.faq-question svg {
  flex-shrink: 0;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  color: var(--brand-secondary);
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.22, 1, 0.36, 1), padding 0.3s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.85;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 26px 22px;
}

.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.step-item {
  text-align: center;
  padding: 32px 22px;
  background: var(--gradient-soft);
  border-radius: var(--radius-md);
  position: relative;
  transition: var(--transition-slow);
  border: 1px solid var(--border-glass);
}

.step-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.step-item::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -14px;
  width: 28px;
  height: 2px;
  background: var(--border-color);
  transform: translateY(-50%);
}

.step-item:last-child::after {
  display: none;
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  margin: 0 auto 18px;
  box-shadow: 0 6px 18px rgba(233, 78, 78, 0.3);
  transition: var(--transition);
}

.step-item:hover .step-number {
  transform: scale(1.1) rotate(-8deg);
}

.step-item h4 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  color: var(--text-primary);
  font-weight: 700;
}

.step-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer {
  background: var(--brand-primary);
  color: rgba(255, 255, 255, 0.8);
  padding: 64px 0 28px;
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 44px;
}

.footer h4 {
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 20px;
  font-weight: 700;
  position: relative;
  padding-bottom: 10px;
}

.footer h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.footer p,
.footer li {
  font-size: 0.9rem;
  line-height: 2;
  color: rgba(255, 255, 255, 0.7);
}

.footer a {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer a:hover {
  color: var(--brand-accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

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

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  border: none;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .howto-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .step-item::after {
    display: none;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .banner h1,
  .banner h2 {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .search-box {
    display: none;
  }
  .banner {
    padding: 32px 24px;
    min-height: 240px;
    border-radius: var(--radius-md);
    margin: 16px auto 32px;
  }
  .banner h1,
  .banner h2 {
    font-size: 1.5rem;
  }
  .banner p {
    font-size: 0.95rem;
    margin-bottom: 20px;
  }
  .banner-btn {
    padding: 12px 28px;
    font-size: 0.95rem;
  }
  .grid-3,
  .grid-2,
  .article-list {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .howto-steps {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .section-header h2 {
    font-size: 1.6rem;
  }
  .section-header {
    margin-bottom: 40px;
  }
  section {
    padding: 52px 0;
  }
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
  .card {
    padding: 24px;
  }
  .stat-number {
    font-size: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .banner h1,
  .banner h2 {
    font-size: 1.25rem;
  }
  .banner p {
    font-size: 0.88rem;
  }
  .stat-number {
    font-size: 1.7rem;
  }
  .section-header h2 {
    font-size: 1.4rem;
  }
  .article-item {
    padding: 20px;
  }
  .faq-question {
    padding: 16px 20px;
    font-size: 0.95rem;
  }
  .faq-answer {
    padding: 0 20px;
  }
  .faq-item.open .faq-answer {
    padding: 0 20px 18px;
  }
  .logo {
    font-size: 1.2rem;
  }
  .logo svg {
    width: 32px;
    height: 32px;
  }
}

@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 {
  .navbar,
  .back-to-top,
  .banner-dots,
  .mobile-menu {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .card,
  .article-item,
  .faq-item {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}