:root {
  --bg: #ffffff;
  --surface: #f8f9fc;
  --surface-elevated: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8888a8;
  --primary: #ff6b6b;
  --primary-dark: #e85555;
  --primary-light: #ff9a9e;
  --primary-glow: rgba(255, 107, 107, 0.15);
  --accent: #4ecdc4;
  --accent-dark: #3ab5ad;
  --border: #e8e8f0;
  --border-light: #f0f0f6;
  --card: #ffffff;
  --card-hover: #fefefe;
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.04);
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-primary: 0 8px 24px rgba(255, 107, 107, 0.3);
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --transition-fast: 0.15s ease;
  --transition: 0.25s ease;
  --transition-slow: 0.4s ease;
  --gradient-primary: linear-gradient(135deg, #ff6b6b 0%, #ff9a9e 100%);
  --gradient-hero: linear-gradient(135deg, #1e1e2f 0%, #2d1b3d 50%, #1a1a2e 100%);
  --gradient-surface: linear-gradient(135deg, #f8f9fc 0%, #f0f2f8 100%);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
}

[data-theme="dark"] {
  --bg: #12121f;
  --surface: #1a1a2e;
  --surface-elevated: #1e1e32;
  --text: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6a6a88;
  --primary: #ff6b6b;
  --primary-dark: #e85555;
  --primary-light: #ff8a8a;
  --primary-glow: rgba(255, 107, 107, 0.2);
  --accent: #4ecdc4;
  --accent-dark: #3ab5ad;
  --border: #2a2a40;
  --border-light: #222238;
  --card: #1e1e32;
  --card-hover: #24243a;
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.2);
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);
  --shadow-primary: 0 8px 24px rgba(255, 107, 107, 0.25);
  --glass-bg: rgba(30, 30, 50, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --gradient-surface: linear-gradient(135deg, #1a1a2e 0%, #1e1e32 100%);
}

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

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

input,
textarea {
  font-family: inherit;
}

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

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}

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

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary);
  color: #fff;
  padding: 8px 16px;
  z-index: 9999;
  transition: top var(--transition-fast);
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--primary-dark);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  flex-shrink: 0;
}

.logo:hover {
  transform: scale(1.03);
  opacity: 0.9;
}

.logo svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.logo:hover svg {
  transform: rotate(-8deg) scale(1.05);
}

.nav-desktop {
  display: flex;
  gap: 2px;
  align-items: center;
}

.nav-desktop a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition);
}

.nav-desktop a:hover,
.nav-desktop a:focus {
  background: var(--surface);
  color: var(--primary);
}

.nav-desktop a:hover::after,
.nav-desktop a:focus::after {
  transform: translateX(-50%) scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 4px 12px;
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  color: var(--text);
  font-size: 0.88rem;
  width: 140px;
  padding: 4px;
  transition: width var(--transition);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

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

.search-box button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.search-box button:hover {
  color: var(--primary);
  background: var(--primary-glow);
}

.theme-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-glow);
  transform: rotate(15deg);
}

.theme-toggle:active {
  transform: rotate(15deg) scale(0.92);
}

.mobile-menu-btn {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.mobile-menu-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 16px;
  z-index: 999;
  box-shadow: var(--shadow-md);
  animation: slideDown 0.25s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mobile-nav.open {
  display: block;
}

.mobile-nav a {
  display: block;
  padding: 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.mobile-nav a:hover {
  background: var(--surface);
  color: var(--primary);
  padding-left: 16px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  list-style: none;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 6px;
  color: var(--text-muted);
  font-size: 1.1em;
  line-height: 1;
}

.breadcrumb a {
  color: var(--primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.hero {
  position: relative;
  background: var(--gradient-hero);
  color: #fff;
  padding: 80px 0 60px;
  overflow: hidden;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin-bottom: 8px;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 107, 107, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatGlow 8s ease-in-out infinite;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(78, 205, 196, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatGlow 10s ease-in-out infinite reverse;
}

@keyframes floatGlow {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.8;
  }
  50% {
    transform: translate(-20px, 20px) scale(1.1);
    opacity: 1;
  }
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  animation: fadeInUp 0.7s ease both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero h1 {
  font-size: 2.4rem;
  line-height: 1.3;
  margin-bottom: 16px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero h1 span {
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.hero h1 span::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  opacity: 0.3;
  z-index: -1;
}

.hero p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 24px;
  max-width: 520px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.15);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn:hover::before {
  opacity: 1;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 107, 107, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary);
}

.btn-primary:active {
  transform: translateY(0) scale(0.97);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.btn-outline:active {
  transform: translateY(0) scale(0.97);
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: left;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.6);
  white-space: nowrap;
}

.hero-visual {
  display: flex;
  justify-content: center;
  animation: fadeInUp 0.7s ease 0.15s both;
}

.hero-visual svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

.carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
  min-width: 100%;
  padding: 32px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

.carousel-slide h3 {
  color: var(--primary);
  margin-bottom: 8px;
  font-size: 1.1rem;
  font-weight: 700;
}

.carousel-slide p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--border);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}

.carousel-dot:hover {
  background: var(--text-muted);
}

.carousel-dot.active {
  background: var(--primary);
  width: 24px;
  box-shadow: 0 0 8px var(--primary-glow);
}

.section {
  padding: 64px 0;
  position: relative;
}

.section-alt {
  background: var(--surface);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.8;
}

.section-header .accent {
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.section-header .accent::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  opacity: 0.25;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  border-radius: var(--radius-full) var(--radius-full) 0 0;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--primary);
  background: var(--card-hover);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary-glow), rgba(255, 107, 107, 0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover .card-icon {
  transform: scale(1.08) rotate(-4deg);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  font-weight: 700;
  line-height: 1.4;
  transition: color var(--transition-fast);
}

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

.card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
  position: relative;
}

.article-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

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

.article-item:hover::before {
  transform: scaleY(1);
}

.article-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  align-items: center;
}

.article-meta span {
  position: relative;
}

.article-meta span::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
  margin-right: 6px;
  vertical-align: middle;
}

.article-item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  font-weight: 700;
  line-height: 1.5;
}

.article-item h3 a {
  transition: color var(--transition-fast);
}

.article-item h3 a:hover {
  color: var(--primary);
}

.article-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 12px;
  line-height: 1.8;
}

.article-more {
  color: var(--primary);
  font-size: 0.88rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition), color var(--transition-fast);
}

.article-more:hover {
  gap: 10px;
  color: var(--primary-dark);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item:hover {
  border-color: var(--primary);
}

.faq-item.open {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  font-family: inherit;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  line-height: 1.5;
}

.faq-question:hover {
  color: var(--primary);
  background: var(--primary-glow);
}

.faq-icon {
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--primary);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 24px 20px;
}

.faq-answer p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

.howto-steps {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
}

.howto-steps::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 40px;
  bottom: 40px;
  width: 2px;
  background: var(--border);
  z-index: 0;
}

.howto-step {
  display: flex;
  gap: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  z-index: 1;
  transition: all var(--transition);
}

.howto-step:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  transform: translateX(4px);
}

.step-number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 4px 12px var(--primary-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.howto-step:hover .step-number {
  transform: scale(1.1);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.step-content h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  font-weight: 700;
  line-height: 1.4;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px;
  border-radius: var(--radius);
  transition: background-color var(--transition-fast);
}

.contact-item:hover {
  background: var(--surface);
}

.contact-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: all var(--transition);
}

.contact-item:hover .contact-icon {
  background: var(--primary);
  color: #fff;
  transform: scale(1.08);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.contact-item h4 {
  font-size: 0.95rem;
  margin-bottom: 4px;
  font-weight: 700;
}

.contact-item p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
}

.contact-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.contact-form:focus-within {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:hover,
.form-group textarea:hover {
  border-color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--card);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
  line-height: 1.7;
}

.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
  position: relative;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0.6;
}

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

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-top: 12px;
  max-width: 320px;
  line-height: 1.8;
}

.footer-brand .logo {
  font-size: 1.15rem;
}

.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  font-weight: 700;
  color: var(--text);
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.86rem;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  position: relative;
  display: inline-block;
}

.footer-col a::before {
  content: "›";
  position: absolute;
  left: -12px;
  opacity: 0;
  color: var(--primary);
  transition: opacity var(--transition-fast), left var(--transition-fast);
}

.footer-col a:hover {
  color: var(--primary);
  padding-left: 12px;
}

.footer-col a:hover::before {
  opacity: 1;
  left: 0;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.footer-bottom a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-primary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.9);
  transition: all var(--transition);
  z-index: 900;
}

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

.back-to-top:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 12px 32px rgba(255, 107, 107, 0.45);
}

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

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  cursor: default;
}

.tag:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-glow);
  transform: translateY(-1px);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.stat-box {
  text-align: center;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.stat-box:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  transform: translateY(-3px);
}

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

.stat-box .num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.stat-box .lbl {
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-top: 4px;
  display: block;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.case-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
}

.case-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--primary);
}

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

.case-body {
  padding: 24px;
}

.case-body h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  font-weight: 700;
  line-height: 1.4;
}

.case-body p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.8;
}

.case-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  background: var(--primary-glow);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 12px;
  transition: all var(--transition-fast);
}

.case-card:hover .case-tag {
  background: var(--primary);
  color: #fff;
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.testimonial {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.testimonial::before {
  content: "\201C";
  position: absolute;
  top: 8px;
  right: 20px;
  font-size: 4rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.08;
  font-family: Georgia, serif;
  transition: opacity var(--transition), transform var(--transition);
}

.testimonial:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  transform: translateY(-3px);
}

.testimonial:hover::before {
  opacity: 0.15;
  transform: scale(1.1);
}

.testimonial-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
  font-style: italic;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: transform var(--transition), box-shadow var(--transition);
}

.testimonial:hover .author-avatar {
  transform: scale(1.08);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.author-info h4 {
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.3;
}

.author-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

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

.reveal:nth-child(2) {
  transition-delay: 0.08s;
}

.reveal:nth-child(3) {
  transition-delay: 0.16s;
}

.reveal:nth-child(4) {
  transition-delay: 0.24s;
}

.reveal:nth-child(5) {
  transition-delay: 0.32s;
}

.reveal:nth-child(6) {
  transition-delay: 0.4s;
}

@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-brand p {
    max-width: 100%;
  }
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .hero-visual {
    order: -1;
  }

  .hero-visual svg {
    max-width: 280px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  .howto-steps::before {
    display: none;
  }
}

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

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

  .search-box {
    display: none;
  }

  .hero {
    padding: 48px 0 40px;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .hero-stats {
    gap: 20px;
  }

  .stat-number {
    font-size: 1.4rem;
  }

  .section {
    padding: 40px 0;
  }

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

  .section-header h2 {
    font-size: 1.4rem;
  }

  .section-header p {
    font-size: 0.92rem;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .carousel-slide {
    padding: 24px;
  }

  .carousel-slide h3 {
    font-size: 1rem;
  }

  .carousel-slide p {
    font-size: 0.88rem;
  }

  .contact-form {
    padding: 24px;
  }

  .howto-step {
    padding: 20px;
    gap: 16px;
  }

  .step-number {
    width: 36px;
    height: 36px;
    font-size: 0.9rem;
  }

  .article-item {
    padding: 20px;
  }

  .faq-question {
    padding: 16px 20px;
    font-size: 0.92rem;
  }

  .faq-answer {
    padding: 0 20px;
  }

  .faq-item.open .faq-answer {
    padding: 0 20px 16px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 36px 0 32px;
  }

  .hero h1 {
    font-size: 1.3rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
    padding: 12px 20px;
  }

  .hero-stats {
    gap: 16px;
  }

  .stat-number {
    font-size: 1.2rem;
  }

  .stat-label {
    font-size: 0.75rem;
  }

  .section-header h2 {
    font-size: 1.25rem;
  }

  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-box {
    padding: 16px;
  }

  .stat-box .num {
    font-size: 1.4rem;
  }

  .testimonial-grid,
  .case-grid {
    grid-template-columns: 1fr;
  }
}

@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero-visual svg {
    animation: none;
  }

  .hero::before,
  .hero::after {
    animation: none;
  }
}

@media print {
  .site-header,
  .mobile-nav,
  .back-to-top,
  .hero-visual,
  .carousel {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .hero {
    background: #fff;
    color: #000;
  }

  .card,
  .article-item,
  .faq-item {
    break-inside: avoid;
    border: 1px solid #ccc;
  }
}

@supports (backdrop-filter: blur(1px)) {
  .site-header {
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
  }
}

@supports not (backdrop-filter: blur(1px)) {
  .site-header {
    background: var(--bg);
  }

  .mobile-nav {
    background: var(--bg);
  }

  .carousel-slide {
    background: var(--surface);
  }
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

input:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
  outline: none;
}

.text-balance {
  text-wrap: balance;
}

.text-pretty {
  text-wrap: pretty;
}